(cid:20)(cid:21)(cid:22)(cid:23)(cid:23)(cid:24)(cid:25)(cid:24)(cid:26)(cid:22)(cid:27)(cid:24)(cid:28)(cid:29)(cid:30)(cid:31) (cid:29)(cid:27)!”(cid:29)(cid:22)(cid:21)(cid:31)

(cid:0)

;⇐>?(cid:19)@ABCD(cid:19)E=A<;(cid:19) HFH>IA;IJACA>K(cid:19)L;@EHM(cid:19)E=(cid:19)

(cid:19)

G<OEP(cid:19)Q(cid:19);@EH(cid:19)<@@H?⇐B(cid:19)=AHB=RSBCC?BID(cid:19)ECI>@⇐O(cid:19)T(cid:19)A;>=I@ABCD(cid:19) EAEBCA;BH(cid:19)E=(cid:19)

G<OEI;K(cid:19)GUVWXYZW(cid:19);U(cid:19)C>GRGR;@ER^(cid:18)R^_(cid:0) G<;>=IG>⇐(cid:19)EXU‘aZW(cid:19);U[(cid:19)_PP(cid:17)bc(cid:19) (cid:19)(cid:19)(cid:19)(cid:19)(cid:19)(cid:19) (cid:19)

IHHB>(cid:19)

(cid:19) ;@EH(cid:19)

DUZdeaVW(cid:19)>fWga(cid:19)

(cid:19)

HEBGA@AGI>A<;(cid:19)@⇐(cid:19)H>=FG>F=IC(cid:19) OI>B=AIC(cid:19)@⇐(cid:19)G<OEP(cid:19)E=(cid:19)

G<OEI;K(cid:19)DUZdeaVW(cid:19);U[(cid:19) (cid:19) ^Q^QH>QHEGQ^(cid:18)(cid:19)

G<;>=IG>⇐(cid:19)DUZdeaVW(cid:19);U[(cid:19)(cid:19)

PP(cid:17)bcQBQD(cid:143)(cid:143)Q(cid:14)(cid:144)QHEOQHDQHQ___^

(cid:19)

DfhZfigfVa(cid:19)

(cid:19) H>=FG>F=IC(cid:19)

DUZdeaVW(cid:19)>jia(cid:19)

(cid:19) HEBGA@AGI>A<;(cid:19)

DUZdeaVW(cid:19)GYWakUXjRGgYhh(cid:19) (cid:19) (cid:14)(cid:19)

DUZdeaVW(cid:19)GgYhhflfZYWfUV(cid:19)

(cid:19) AVWaXVYg(cid:19)

(cid:0) (cid:0) (cid:0)

(cid:0)

(cid:0)

(cid:0)

(cid:2)(cid:10)(cid:0) (cid:2)|(cid:3)(6+(cid:3)(cid:1)(cid:2)(cid:1)}(cid:0)

(cid:2)(cid:2)(cid:0) (cid:10)(cid:137)(cid:3)-)8(cid:3)(cid:1)(cid:2)(cid:1)}(cid:0)

6~~0(cid:15)(cid:127)(cid:13)(cid:128)(cid:0)(cid:16)(cid:15)0(cid:0) (cid:7)(cid:15)1(cid:129)/0(cid:130)(cid:131)/(cid:132)(cid:15)1(cid:0)

6~~0(cid:15)(cid:127)(cid:13)(cid:128)(cid:0)(cid:16)(cid:15)0(cid:0) (cid:7)(cid:15)1(cid:129)/0(cid:130)(cid:131)/(cid:132)(cid:15)1(cid:0)

8(cid:0) (cid:10)|(cid:3)(cid:138)6*(cid:3)(cid:1)(cid:2)(cid:1)}(cid:0) $(cid:129)(cid:129)(cid:130)(cid:13)(cid:128)(cid:0)(cid:16)(cid:15)0(cid:0)6~~0(cid:15)(cid:127)(cid:11)(cid:136)(cid:0)

6(cid:0) (cid:2)(cid:139)(cid:3)*&9(cid:3)(cid:1)(cid:2)(cid:1)(cid:140)(cid:0) $(cid:129)(cid:129)(cid:130)(cid:13)(cid:128)(cid:0)(cid:16)(cid:15)0(cid:0)+(cid:13)(cid:127)(cid:132)(cid:13)(cid:141)(cid:0)

=B(cid:142)[(cid:19)

DI>B(cid:19)

DBHG=AE>A<;(cid:19)<@(cid:19) =B(cid:142)AHA<;(cid:19)

m nopqrst uvnswxywxyzwz{s

(cid:0) (cid:4)(cid:130)0(cid:13)(cid:129)(cid:133)(cid:0)8(cid:11)(cid:134)(cid:130)(cid:31) (cid:4)(cid:11)0(cid:11)(cid:0)((cid:15)(cid:133)(cid:11)(cid:135)(cid:13)(cid:128)(cid:0) #(cid:11)(cid:136)(cid:132)/(cid:0)&(cid:135)(cid:13)0(cid:0) (cid:4)/05(cid:0)((cid:11)/(cid:13)0(cid:132)(cid:11)(cid:136)(cid:0) )1(cid:12)(cid:132)1(cid:13)(cid:13)0(cid:31)

%25(cid:0)3(cid:13)(cid:11)(cid:128)(cid:3)4-(cid:0) (cid:4)/0(cid:130)(cid:131)/(cid:130)0(cid:13)(cid:0)3(cid:13)(cid:11)(cid:128)(cid:0)

(cid:145)(cid:146)(cid:145)(cid:147)(cid:148)(cid:146)(cid:149)(cid:148)(cid:146)(cid:150)(cid:151) (cid:152)(cid:146)(cid:153)(cid:146)(cid:152)(cid:153)(cid:145)(cid:149)(cid:151)(cid:154)(cid:146)(cid:149)(cid:155)(cid:146)(cid:146)(cid:155)

(cid:145)(cid:146)(cid:145)(cid:147)(cid:148)(cid:146)(cid:149)(cid:148)(cid:146)(cid:150)(cid:151)

(cid:0)

(cid:4)(cid:130)0(cid:13)(cid:129)(cid:133)(cid:0)8(cid:11)(cid:134)(cid:130)s (cid:4)(cid:11)0(cid:11)(cid:0)((cid:15)(cid:133)(cid:11)(cid:135)(cid:13)(cid:128)(cid:0) #(cid:11)(cid:136)(cid:132)/(cid:0)&(cid:135)(cid:13)0(cid:0) (cid:4)/05(cid:0)((cid:11)/(cid:13)0(cid:132)(cid:11)(cid:136)(cid:0) )1(cid:12)(cid:132)1(cid:13)(cid:13)0s

%25(cid:0)3(cid:13)(cid:11)(cid:128)(cid:3)4-(cid:0) (cid:4)/0(cid:130)(cid:131)/(cid:130)0(cid:13)(cid:0)3(cid:13)(cid:11)(cid:128)(cid:0)(cid:0)

(cid:4)(cid:130)0(cid:13)(cid:129)(cid:133)(cid:0)8(cid:11)(cid:134)(cid:130)s (cid:4)(cid:11)0(cid:11)(cid:0)((cid:15)(cid:133)(cid:11)(cid:135)(cid:13)(cid:128)(cid:0) #(cid:11)(cid:136)(cid:132)/(cid:0)&(cid:135)(cid:13)0(cid:0) (cid:4)/05(cid:0)((cid:11)/(cid:13)0(cid:132)(cid:11)(cid:136)(cid:0) )1(cid:12)(cid:132)1(cid:13)(cid:13)0s

%25(cid:0)3(cid:13)(cid:11)(cid:128)(cid:3)4-(cid:0) (cid:4)/0(cid:130)(cid:131)/(cid:130)0(cid:13)(cid:0)3(cid:13)(cid:11)(cid:128)(cid:0)(cid:0)

(cid:4)(cid:130)0(cid:13)(cid:129)(cid:133)(cid:0)8(cid:11)(cid:134)(cid:130)(cid:0) (cid:4)(cid:11)0(cid:11)(cid:0)((cid:15)(cid:133)(cid:11)(cid:135)(cid:13)(cid:128)(cid:0) #(cid:11)(cid:136)(cid:132)/(cid:0)&(cid:135)(cid:13)0(cid:0)

(cid:4)/05(cid:0)((cid:11)/(cid:13)0(cid:132)(cid:11)(cid:136)(cid:0) )1(cid:12)(cid:132)1(cid:13)(cid:13)0(cid:0)

%25(cid:0)3(cid:13)(cid:11)(cid:128)(cid:3)4-(cid:0) (cid:4)/0(cid:130)(cid:131)/(cid:130)0(cid:13)(cid:0)3(cid:13)(cid:11)(cid:128)(cid:0)

E=BEI=BD(cid:19)JK(cid:19)

=B(cid:142)ABSBD(cid:19)JK(cid:19)

IEE=<(cid:142)BD(cid:19)JK(cid:19)

(cid:4)(cid:11)(cid:132)(cid:13)(cid:135)(cid:0)(cid:4)556(cid:0)(cid:0)(cid:0)(cid:0)(cid:0)(cid:0)(cid:0)(cid:0)(cid:0)(cid:141)(cid:141)(cid:141)5(cid:129)(cid:11)(cid:132)~(cid:13)(cid:135)5(cid:131)(cid:15)(cid:135)(cid:0)

(cid:0)

(cid:5)#$(cid:4)(cid:0)$(cid:4)(cid:0)(cid:6)+&(cid:6))+(cid:5),(cid:0)&-(cid:0).(cid:11)/(cid:11)0)1(cid:13)0(cid:12)2(cid:0)345(cid:0)(cid:0)(cid:5)#$(cid:4)(cid:0)$4(cid:0)&+(cid:0)(6(cid:5))+$63(cid:0)$8)%(cid:0)(cid:5)#)+)&(cid:0)(6,(cid:0)&(cid:5)(cid:0)8)(cid:0)(cid:7)&(cid:6)$)$(cid:4)(cid:7)3&(cid:4))%(cid:0)*(cid:0)6*,(cid:0)-&+((cid:0)&+(cid:0)()%’((cid:0)(cid:5)&(cid:0)(cid:5)#$+$)(cid:4)(cid:0)&+(cid:0)’(cid:4))%(cid:0)-&+(cid:0)&(cid:5)#)+(cid:0)(cid:5)#6*(cid:0)(cid:5)#)(cid:0)(cid:6)’+(cid:6)&(cid:4))(cid:0)-&+(cid:0)7#(cid:7)#(cid:0)(cid:5)(cid:0)#6(cid:4)(cid:0)8))(cid:0) (cid:6)+&9(cid:0)7#&3)(cid:0)&+(cid:0)$\ast (cid:0)(cid:6)6+(cid:5)(cid:0)$(cid:0)6,(cid:0)(6**)+(cid:0)):(cid:7))(cid:6)(cid:5)(cid:0)6(cid:4)(cid:0)):(cid:6))+)(cid:4)(cid:4)3,(cid:0)(cid:6))+($(cid:5)(cid:5))%(cid:0)8,(cid:0).(cid:11)/(cid:11)0)1(cid:13)0(cid:12)2(cid:0)3*45(cid:0) (cid:0)

(cid:1)(cid:2)(cid:2)(cid:3)(cid:1)(cid:2)(cid:3)(cid:4)(cid:5)(cid:3)(cid:4)(cid:6)(cid:7)(cid:3)(cid:2)(cid:2)(cid:2)(cid:1)(cid:8)(cid:9)(cid:2)(cid:10)(cid:0) (cid:0)

(cid:0)(cid:0)(cid:0)(cid:0)

(cid:6)(cid:11)(cid:12)(cid:13)(cid:0)(cid:14)(cid:0)(cid:15)(cid:16)(cid:0)(cid:17)(cid:18)(cid:19)

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL

REVISION HISTORY

Revision

Date

Revision Description

A1

25-OCT-2024

Issued for Inter-Discipline Check

A

B

07-NOV-2024

Issued for Review

13-JAN-2025

Issued for Approval

00

18-FEB-2025

Approved for Construction

• Remarks line added from IFA to AFC.

• All HOLDS were cleared.

• Table 8.1 Structural category corrected.

• 9.1.6 Appendix-3 SR equivalency note added.

• 9.2 References for Appendix-1, 2 & 3 added.

• Table 9.2 & 9.3: SR values updated, and Optional requirements for EN were deleted for clarity.

• 13 (1): Reference amended

• 13 (3): Bold fonts removed and updated.

• 14.2 Op-18: Text deleted and Notes updated.

• Appendix-1, 2 & 3 were added.

01

03-MAR-2025

Approved for Construction

• 14.2 Op-18: Notes updated.

HOLDS LIST

Hold No

Hold Description

200-20-ST-SPC-00029_01

Page 2 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

TABLE OF CONTENTS

INTRODUCTION … 7

1.1. Project Objective… 7

1.2. Project Scope … 7

2. DEFINITIONS AND ABBREVIATIONS … 11

2.1 Definitions … 11

2.2 Definitions of Structural Material Terms … 12

2.3 Abbreviations … 13

2.4 System of Units … 14

3. REGULATIONS, CODES AND STANDARDS … 15

3.1 Company References … 15

3.2 Project Documents … 16

3.3 Standards … 17

4. PURPOSE OF THE DOCUMENT … 22

5. GENERAL CONSIDERATION … 22

6. DESIGN PHILOSOPHY … 23

6.1 Material Characterization … 23

6.2 Material Selection Criteria … 23

6.2.1 Yield Strength Requirements … 23

6.2.2 Structure Exposure Level … 23

6.2.3 Component Criticality … 23

6.2.4 Lowest Anticipated Service Temperature, LAST … 23

6.2.5 Other Considerations … 24

6.3 Selection Process … 24

7. STRENGTH GROUPS AND TOUGHNESS CLASSES … 25

7.1 Strength Groups … 25

7.2 Toughness Classes … 25

8. MATERIAL SELECTION APPROACH … 26

8.1 Material Substitution … 29

9. MATERIALS … 31

9.1 Steel Material … 31

200-20-ST-SPC-00029_01

Page 3 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

9.1.1 General … 31

9.1.2 API RP 2Z Pre-Qualification … 31

9.1.3 Hot-Dip Galvanized Items … 33

9.1.4 Plates, Rolled Shapes and Structural Material … 33

9.1.4.1

Centerline Segregation Requirements… 33

9.1.4.2

Plate Edges… 33

9.1.4.3

Tubulars … 34

9.1.5 CTOD Testing for Toughness Class CV2X and CV2ZX … 34

9.1.6 Through-Thickness (Z-direction) Test for CV2X and CV2ZX … 35

9.2 Designation of Steel … 36

IDENTIFICATION, MARKING AND DOCUMENTATION … 45

10.1 Identification and Marking of Steel … 45

10.2 Documentation Requirements… 45

10.2.1 General … 45

10.2.2 Material Test Reports, MTR … 46

11. TRACEABILITY, SHIPPING AND STORAGE … 47

11.1 Material Traceability Program … 47

11.1.1 Material Description Code, MDC for Steels … 47

11.1.2 Shipping Requirements for Miscellaneous Materials … 48

12. QUALITY ASSURANCE PROVISIONS … 49

12.1 Hot and Cold Forming … 49

12.1.1 Cold Forming … 49

12.1.2 Hot Forming … 50

12.2 Ultrasonic Inspections of Through-Thickness Plate … 50

12.3 Steel Manufacturer Inspections … 51

12.4 Preparation for Shipping and Storage … 51

13. MATERIAL SPECIFICATION TABLES … 52

14. SUPPLEMENTARY STEEL REQUIREMENTS… 69

14.1 API STEEL OPTIONAL REQUIREMENTS … 69

14.2 EN STEEL OPTIONAL REQUIREMENTS … 69

15. ALTERNATIVE STEEL GRADES … 70

16. REPAIRS AND REPLACEMENT … 70

200-20-ST-SPC-00029_01

Page 4 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

17. FABRICATION, WELDING AND TESTING … 70

18. OTHER MATERIAL … 70

18.1 Grout Material … 70

18.2 Timber Material … 71

18.3 Swing Rope … 71

18.4 Fiberglass … 71

18.4.1 Fiberglass Grating … 71

18.4.2 Other Fiberglass Component … 72

18.5 Bolts and Nuts … 72

18.5.1 Heavy Hex Type Carbon Steel Bolts (Above 0.5in, along with metric threads

standard) … 72 18.5.2 Hex Type Carbon Steel Bolts (Below 0.5in) … 72

18.5.3 Stud bolts … 73

18.6 Solid Bars … 73

18.6.1 NDE Testing … 73

18.6.2 Frequency of Testing … 73

18.7 Handrails … 73

18.8 Steel Grating and Stair Treads … 74

18.9 Rubber Goods … 74

18.10 Rub Strips for Boat Landings and Barge Bumpers … 74

18.11 Chain Link Fencing … 75

18.12 Shipping Requirements for Miscellaneous Materials … 75

19. APPENDICES … 76

200-20-ST-SPC-00029_01

Page 5 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Figures & Tables

Figures

Figure 1-1 NFPS Compression Project COMP3 Scope………………………….…………….10

Tables

Table 2-1 Units of measurements … 14 Table 7-1 Steel Group SMYS Requirements … 25 Table 8-1 Material Selection for Topside Structure … 27 Table 8-2 Material Selection for Jacket Structure … 28 Table 8-3 Permissible Material Substitutions … 30 Table 9-1 Essential Variables for CV2X and CV2ZX … 32 Table 9-2 Steel Type for Topsides Structure … 37 Table 9-3 Steel Type for Jacket Structure … 41 Table 13-1 Yield Type I – Toughness Class NT … 53 Table 13-2 Yield Type I – Toughness Class CV1 … 54 Table 13-3 Yield Type I – Toughness Class CV2, CV2Z4 and CV2Z5 … 55 Table 13-4 Yield Type II – Toughness Class NT … 57 Table 13-5 Yield Type II – Toughness Class CV1 … 58 Table 13-6 Yield Type II – Toughness Class CV2, CV2Z4 and CV2Z5 … 59 Table 13-7 Yield Type II – Toughness Class CV2X and CV2ZX … 61 Table 13-8 Yield Type III – Toughness Class CV1 … 63 Table 13-9 Yield Type III – Toughness Class CV2, CV2Z4 and CV2Z5 … 65 Table 13-10 Yield Type III – Toughness Class CV2X and CV2ZX … 67 Table 18-1 Characteristic Cube Strength … 71

200-20-ST-SPC-00029_01

Page 6 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

1. INTRODUCTION

The North Field is the world’s largest natural gas field and accounts for nearly all the State of Qatar’s gas production. The principal objective of the NFPS projects is to sustain plateau from existing QatarEnergy LNG Operation – S1, S2, S3, N1 and N2 , production areas by implementing an integrated and optimum investment program consisting of subsurface development, pressure drop reduction steps and compression.

NFPS projects comprise 3 main investment programs:

1. Investment #1: Drilling and Associated Facilities [WHP12S/ WHP13S/ WHP14S/

WHP12N/ WHP13N]

2. Investment #2: Trunk line Looping and Intra-field pipeline looping [32” PL1LN, 32”

PL1LS, 38”PL610LS]

3. Investment #3: Compression Complexes and associated facilities [Phase 1 CP6S

& CP7S; Phase 2: CP8S & CP4N; Phase 3: CP4S & CP6N Phase 4: CP1S & CP1N]

Drilling and Looping, Investments #1 and #2, projects are in execution phase and are being executed as I1P1, EPCOL Projects except for WHP13N, which will be part of NFPS Compression Projects execution which compromises total up to 9 COMPs.

1.1. Project Objective

The objective of this Project includes:

• Achieve standards of global excellence in Safety, Health, Environment, Security and

Quality performance.

• Sustain the QatarEnergy LNG North Field Production Plateau by installing new RPs and one WHPs to support new Compression Complex facilities CP6S & CP7S and pre-installed facilities for future Compression Complex facilities including but not limited to CP4N & CP8S tie-in with integration to the existing facilities under Investment #3 program.

• Facility development shall be safe, high quality, reliable, maintainable, accessible,

operable, and efficient throughout their required life.

1.2. Project Scope

The Project Scope includes detailed engineering, procurement, construction, brownfield modifications, transportation & installation, hook-up and commissioning, tie-in to EXISTING PROPERTY and provide support for start-up activities of the following facilities and provisions for future development. The WORK shall be following the specified regulations, codes, specifications and standards, achieves the specified performance, and is safe and fit‐for‐purpose in all respects.

200-20-ST-SPC-00029_01

Page 7 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Facilities – 1A

• RP5S RP with 2 x 28” CRA clad pipelines to RP7S and 2 subsea composite Cables and associated J tubes from RP7S to RP5S & from CP7S to WHP13S. • New Fuel Gas 8” CRA Spur-lines and flanged risers from Subsea skid to RP7S • Hook-up and brownfield modification at WHP5S/RP5S bridge connection & WHP13S/CP7S Composite cable tie-in and E&I integration including RGA Control modification

• Pipeline decommissioning of 28” CS PL5S including associated demolition work

at WHP5S

Facilities – 2A

• RP6N RP with 1x28” CRA clad pipeline to WHP13N, 2 Subsea composite cables

and associated J tubes from WHP12N to RP4N and RP6N to WHP13N.

• New fuel gas spur-line and flanged riser from subsea skid to RP6N • WHP13N Topside • Hook-up and brownfield modification at WHP6N/RP6N, RP4N- HPU-Umbilical installation, E&I migration, and WHP6N/RP4N/WHP4N-E&I migration (Pre-CP4N), WHP13N and RP6N interconnection to NFB.

tie-in, WHP12N-new

tube

J

Facilities – 3A

• RP9S RP with 1x28” CRA clad pipeline to RP4S, • Hook-up and brownfield modification at RP4S/WHP9S, Modifications to integrate

RP9S to the RGA control network.

• Pipeline decommissioning of 28” CS PL9 to WYE on existing 38” trunkline PL48

including associated demolition work at WHP9S.

Facilities – 1B

• New fuel gas spur-line and flanged riser from subsea skid to RP4N • Fiber Optic Cable from RP6N to onshore LFP East, RP6N to RP4N and RP6N

to LQ6S.

• Hook-up and brownfield modification at RP6N Composite and FO Tie-ins NFB- PU Power & Control modifications, LQ6S/LFP (East)/BVS (East)- FO Tie-in Controls/Telecoms Integration

Facilities – 2B

• RP5N RP with 2 x 28” CRA clad pipelines to RP4N, 1 x 28” CRA clad pipeline to RP6N and 2 subsea composite Cables and associated J tubes from WHP12N to RP5N & from RP6N to RP5N.

• Hook-up and brownfield modification at WHP5N- RP5N Bridge connection, WHP12N Composite cable tie-in, RP4N Intrafield pipeline Hook up PL54 N/LN and E&I integration including NFB-PU Power & Control modifications

• Pipeline decommissioning of 2 x 16” PL56/PL54 Subsea Spur line from WHP5N

to reducing barred tee in subsea tie-in skid on PL6 / PL4.

200-20-ST-SPC-00029_01

Page 8 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Facilities – 3B

• 2 subsea composite Cables from RP4S to RP9S & from RP4S to WHP12S (with

J-tube)

• New Fuel Gas 8” CRA Spur-lines and flanged risers from Subsea skid to RP4S • Hook-up and brownfield modification at WHP12S/ RP9S/ RP4S Composite cable tie-in, Spurline riser installation at RP4S RGA Power & Control modifications.

Facilities – 4B

• 2 subsea composite Cables from CP8S to RP11S & from RP8S to RP11S (with

J-tube), FO Cable from RT2 to Barzan WHP1.

• New Fuel Gas 8” CRA Spur-lines and flanged risers from Subsea skid to RT2.

• Hook-up and brownfield modification at WHP8S/ WHP11S for Test separator Internal Upgrade and MEG system modification, Spur lines, Power & Control Tie-ins on RP8S, RP11S/WHP11S-Tie-in (Power and Control), RGA Power & Control modifications.

Facilities – 5B

• 2 subsea composite Cables from RT2 to WHP3S & from RT2 to WHP2S (with J-

tube)

• New Fuel Gas 8” CRA Spur-lines and flanged risers from Subsea skid to RP8S • Hook-up and brownfield modification at BRZ-WHP1 – FO cable tie-in, WHP2S/ WHP3S/ RT&RT2 Composite cable tie-in and associated modification, RGA Power & Control modifications.

Facilities – 6B

• RP3S RP with 1x24” CRA clad pipeline to RT2 with Stalk on risers, • Hook-up and brownfield modification at RT2 for 24” Intrafield pipeline and Composite/FO cable Hook-up, WHP3S for Production diversion and Utilities, Power and ICSS Hook-up, WHP2S for Composite Cable Tie-ins and Power & Control Integration RGA Power & Control modifications.

Decommissioning at topside existing and In-situ abandonment of existing Topside/subsea Composite Cables RT-WHP2S, RT-WHP3S, Topside/Subsea FO cable RT-BRXWHP1.

200-20-ST-SPC-00029_01

Page 9 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Figure 1-1 NFPS Compression Project COMP3 Scope

200-20-ST-SPC-00029_01

Page 10 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

2. DEFINITIONS AND ABBREVIATIONS

2.1 Definitions

Definition

Description

COMPANY

QatarEnergy LNG.

CONTRACTOR

Saipem S.p.A.

DELIVERABLES

FACILITIES

MILESTONE

PROJECT

SITE

SUBCONTRACT

SUBCONTRACTOR

All products (drawings, equipment, services) which must be submitted by CONTRACTOR to COMPANY at times specified in the contract. All machinery, apparatus, materials, articles, components, systems and items of all kinds to be designed, engineered, procured, manufactured, constructed, supplied, fabricated, tested and permanently installed by CONTRACTOR at SITE in connection with the NFPS Project as further described in Exhibit 6.

A reference event splitting a PROJECT activity for progress measurement purpose

COMP3 - NFPS Offshore Riser/Wellhead Platform & Intrafield Pipelines Project

(i) any area where Engineering, Procurement, Fabrication of the FACILITIES are being carried out and (ii) the area offshore required for installation of the FACILITIES in the State of Qatar Contract signed by SUBCONTRACTOR and CONTRACTOR for the performance of a certain portion of the WORK within the Project. Any organization selected and awarded by CONTRACTOR to supply a certain Project materials or equipment or whom a part of the WORK has been Subcontracted.

WORK

Refer to article 2 of CONTRACT AGREEMENT

WORK PACKAGE

The lowest manageable and convenient level in each WBS subdivision

VENDOR (SUPPLIER)

A party who is providing subcontracted services specified and ordered by CONTRACTOR or EPC CONTRACTOR

200-20-ST-SPC-00029_01

Page 11 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

2.2 Definitions of Structural Material Terms

Definition

Description

Pcm

Carbon equivalent, based upon the chemical portion of the Ito-Bessyo carbon equivalent equation

Toughness Class CV1

Charpy testing at LAST

Toughness Class CV2

Charpy testing below LAST

Toughness Class CV2X

Charpy testing below LAST and API RP 2Z qualified

Toughness Class CV2Z4 Charpy testing below LAST and API SR-4 Supplementary requirement for through-thickness testing per API SPEC 2W / API SPEC 2Y

Toughness Class CV2Z5 Charpy testing at 30C below LAST and API SR-5 Supplementary requirement for low sulfur per API SPEC 2W / API SPEC 2Y

Toughness Class CV2ZX Charpy testing below LAST, API RP 2Z qualified and API SR-4 Supplementary requirement for through-thickness testing per API SPEC 2W / API SPEC 2Y

Toughness Class NT

No Charpy testing required but materials shall be suitable for Yield Type toughness requirement at ambient temperature.

Toughness Designator X

Indicates formal welding pre-qualification required.

Toughness Designator Z4

Indicates through thickness properties required and verified by testing.

Toughness Designator Z5

Improved through thickness properties by limited sulfur content.

Toughness Designator ZX Combination of Toughness Designators Z4 and X.

Yield Type I

Yield Type II

Yield Type III

Specified Minimum Yield Strength (SMYS): 248 MPa (36 ksi), Specified Minimum Tensile Strength (SMTS): 400 MPa (58 ksi), Charpy V-Notch (CVN): 21/17 J ( 15/12 ft-lb) SMYS: 345 MPa (50 ksi), SMTS: 482 MPa (70 ksi), CVN: 42/35J

SMYS: 413 MPa (60 ksi), SMTS: 517 MPa (75 ksi), CVN: 47/40J

200-20-ST-SPC-00029_01

Page 12 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

2.3 Abbreviations

Code

Description

NFPS

North Field Production Sustainability

QELNG

QatarEnergy LNG

EPCI

FEED

AISC

API

CTOD

CVN

DC

Engineering Procurement Construction and Installation

Front End Engineering Design

American Institute of Steel Construction

American Petroleum Institute

Crack Tip Opening Displacement

Charpy V-Notch

Design Class

DSAW

Double Submerged Arc Welded

ERW

FCA

GRP

HAZ

HB

LAST

MC

MDC

MPT

MT

MTR

NA

NDE

SAW

SI

SMTS

SMYS

TMCP

TTP

UT

WSD

Electric Resistance Welded

Fabrication Change Allowance

Glass Reinforced Plastic

Heat-Affected Zone

Brinell Hardness

Lowest Anticipated Service Temperature

Material Category

Material Description Code

Magnetic Particle Testing

Metric Tons

Material Test Reports

Not Applicable

Non-Destructive Examination

Submerged Arc Welded

System International

Specified Minimum Tensile Strength

Specified Minimum Yield Strength

Thermomechanical Controlled Process

Through-Thickness Properties

Ultrasonic Testing

Work Stress Design

200-20-ST-SPC-00029_01

Page 13 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

2.4 System of Units

The System International (SI) units are adopted for the analyses and calculations unless otherwise indicated. In case other units are quoted from reference sources, e.g. imperial units in American codes, these units are converted to SI units.

Table 2-1 Units of measurements

DESCRIPTION

Length

Angle

Force

Moment

UNITS

m / mm

deg / rad

kN

kN.m

Stress and pressure

kPa / MPa

Time

Speed

Energy

Temperature

s

m/s

MJ

oC

Mass

kg / MT

200-20-ST-SPC-00029_01

Page 14 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

3. REGULATIONS, CODES AND STANDARDS

In general, all design activities shall confirm to legal and statutory regulations and recognized industry best practices. Conflict among applicable specification and / or codes shall be brought to the attention of the COMPANY for resolution COMPANY decision shall be final and shall be implemented. The latest editions of codes and specification effective as on date of contract shall be followed.

In general, the order of precedence shall be followed:

a) Qatari Governmental and Regulatory Requirements

b) COMPANY Procedures, Policies and Standards (Exhibit 5 Appendix I)

c) Project Specifications.

d) Industry Codes and Standards

e) COMPANY and CONTRACTOR’s Lessons Learned

If CONTRACTOR/SUBCONTRACTOR deems any deviations from the specifications will result in significant project cost and schedule saving, proposal to such deviations shall be submitted to COMPANY for review and approval. CONTRACTOR/SUBCONTRACTOR shall not proceed with any deviation to the specifications without prior COMPANY approval. In general, all design activities shall conform to legal and statutory regulations, and recognized industry best practices.

The following is a list of relevant regulations, codes, standards, specification, Company documents that shall be considered for the Project in the order of precedence listed above.

3.1 Company References

S. No

Document Number

Title

[1]

PRJ-PJL-PRC-004

[2]

PRJ-PJL-PRC-005

Facilities Engineering and Vendor Document Numbering Procedure

Facilities, System and Unit Number Codes and Descriptions Procedure

[3]

PRJ-PJL-PRC-006

Project Information Handover Procedure

[4]

PRJ-PJL-PRC-048

[5]

PRJ-PJL-PRC-049

Facilities Documentation Metadata Requirements Procedure Project Acceptance Procedure

Information Handover, Verification and

200-20-ST-SPC-00029_01

Page 15 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

3.2 Project Documents

S. No

Document Number

Title

[6]

200-22-ST-DEC-00004

[7]

200-20-ST-DEC-00007

[8]

200-20-ST-SPC-00036

Topside Structural Design Basis (Greenfield) for COMP3 Project

Brownfield Structural Design Basis Offshore for COMP3 Project

Specification for Structural Steelwork Hot Dip Galvanising for COMP3 Project

[9]

200-20-ST-SPC-00038

Specification for Offshore Steel Structure, Welding, and Inspection for COMP3 Project

[10]

200-20-ST-SPC-00032

[11]

200-20-ST-SPC-00040

Specification for Open Grid Flooring And Hand Railings for COMP3 Project

Specification for Structural Fatigue Life Improvement By Weld Grinding For COMP3 Project

[12]

200-20-ST-SPC-00033

Specification for Skid Mounted Assemblies - Structural Requirements for COMP3 Project

[13]

200-20-AB-SPC-00004

Architectural Specification – Offshore for COMP3 Project

[14]

200-20-ST-SPC-00035

[15]

200-20-CE-SPC-00026

Specification for Bridge Bearings for COMP3 Project

Specification for Elastomer and Thermoplastic selection for COMP3 Project

[16]

200-20-ST-SPC-00031

Specification for Structural Steel Pipe Supports for Pipes for COMP3 Project

[17]

200-20-ST-SPC-00034

[18]

200-20-ST-SPC-00041

Specification for Design of Deck Structures for Offshore Platforms for COMP3 Project

Specification for Design of Jackets And Piles for COMP3 Project

[19]

200-20-CE-SPC-00027

Specification for Fixed Facilities Protective Coating for COMP3 Project

[20]

COMP3-SPM-PE-PRC-00003 Document Numbering Procedure

200-20-ST-SPC-00029_01

Page 16 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

3.3 Standards

S. No.

[21]

[22]

[23]

[24]

[25]

[26]

[27]

[28]

[29]

[30]

REFERENCES

AISC-ASD, 9th Ed. 1989, Manual of Steel Construction, Allowable Stress Design, 9th Edition. API RP 2A-WSD, 22nd Ed. R 2020, Recommended Practice for Planning, Design and Constructing Fixed Offshore Platforms – Working Stress Design. API RP 2Z, 4th Ed. R 2020, Recommended Practice for Preproduction Qualification for Steel Plates for Offshore Structures API SPEC 2B, 6th Ed. R 2020, Specification for the Fabrication of Structural Steel Pipe API SPEC 2H, 9th Ed. R 2020, Specification for Carbon Manganese Steel Plate for Offshore Structures API SPEC 2MT1, 2nd Ed. R 2012, Specification for Carbon Manganese Steel Plate with Improved Toughness for Offshore Structures API SPEC 2W, 6th Ed. 2019, Specification for Steel Plates for Offshore Structures, Produced by Thermo-Mechanical Control Processing (TMCP) API SPEC 2Y, 5th Ed. R 2020, Specification for Steel Plates, Quenched-and-Tempered, for Offshore Structures API SPEC 5L, 46th Ed. 2019, Specification for Line Pipe, Forty-sixth Edition API SPEC 10A, 25th Ed. 2019, Specification for Cements and Materials for Well Cementing

[31]

ASME B1.1, Unified Inch Screw Threads (UN and UNR Thread Form)

[32]

[33]

[34]

ASME B18.2.2, Nuts for General Applications: Machine Screw Nuts, Hex, Square, Hex Flange, and Coupling Nuts (Inch Series) ASTM A 6/A 6M, Standard Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling ASTM A 20/A 20M, Standard Specification for General Requirements for Steel Plates for Pressure Vessels

[35]

ASTM A 36/A 36M, Standard Specification for Carbon Structural Steel

[36]

ASTM A 53/A 53M, Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless

Rev

9th Ed

22nd Ed

4th Ed

6th Ed

9th Ed

2nd Ed

6th Ed

5th Ed

46th Ed

25th Ed

2003

2015

2019

2020

2019

2024

200-20-ST-SPC-00029_01

Page 17 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

S. No.

[37]

[38]

[39]

[40]

[41]

[42]

[43]

[44]

[45]

[46]

[47]

[48]

REFERENCES

ASTM A 106/ A 106M, Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service ASTM A 123/ A 123M, Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products ASTM A 131/A 131M, Standard Specification for Structural Steel for Ships ASTM A 193/A 193M, Standard Specification for Alloy-Steel and Stainless Steel Bolting for High Pressure or High Temperature, or Both ASTM A 194/A 194M, Standard Specification for Carbon and Alloy- Steel and Stainless Steel Nuts for Bolts for High Pressure or High Temperature Service, or Both ASTM A 275/A 275M, Standard Practice for Magnetic Particle Examination of Steel Forgings ASTM A 304, Standard Specification for Carbon and Alloy Steel Bars Subject to End-Quench Hardenability Requirements ASTM A 370, Standard Test Methods and Definitions for Mechanical Testing of Steel Products ASTM A 388/A 388M, Standard Practice for Ultrasonic Examination of Heavy Steel Forgings ASTM A 392, Standard Specification for Zinc-Coated Steel Chain-Link Fence Fabric ASTM F3125/F3125M, Standard Specification for High Strength Structural Bolts, Steel and Allow Steel, Heat Treated, 120 (830 Mpa) and105 ksi (1040 Mpa) Minimum Tensile Strength, Inch and Metric Dimensions ASTM A 537/A 537M, Standard Specification for Pressure Vessel Plates, Heat-Treated, Carbon-Manganese-Silicon Steel

[49]

ASTM A 563, Standard Specification for Carbon and Alloy Steel Nuts

[50]

[51]

[52]

ASTM A 572/A 572M, Standard Specification for High-Strength Low- Alloy Columbium-Vanadium Structural Steel ASTM A 578/A 578M, Standard Specification for Straight-Beam Ultrasonic Examination of Rolled Steel Plates for Special Applications ASTM A 633/A 633M, Standard Specification for Normalized High- Strength Low-Alloy Structural Steel Plates

Rev

2019

2024

2019

2024

2024

2023

2020

2024

2023

2022

2023

2020

2024

2021

2023

2024

200-20-ST-SPC-00029_01

Page 18 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

S. No.

[53]

[54]

[55]

[56]

[57]

[58]

[59]

[60]

[61]

[62]

[63]

[64]

[65]

[66]

[67]

[68]

[69]

REFERENCES

ASTM A 709/A 709M, Standard Specification for Structural Steel Bridges ASTM A 729/A 729M, Standard Specification for Alloy Steel Axles, Heat Treated, for Mass Transit and Electric Railway Services ASTM A 770/A 770M, Standard Specification for Through-Thickness Tension Testing of Steel Plates for Special Applications ASTM C 109/C 109M, Standard Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or [50 mm] Cube Specimens) ASTM D 143, Standard Test Methods for Small Clear Specimens of Timber ASTM D 245, Standard Practice for Establishing Structural Grades and Related Allowable Properties for Visually Graded Lumber ASTM D 2555, Standard Practice for Establishing Clear Wood Strength Values ASTM E 8/E 8M, Standard Test Methods for Tension Testing of Metallic Materials ASTM E 23, Standard Test Methods for Notched Bar Impact Testing of Metallic Materials ASTM E 84, Standard Test Method for Surface Burning Characteristics of Building Materials ASTM E 112, Standard Test Methods for Determining Average Grain Size ASTM E 399, Standard Test Method for Linear-Elastic Plane-Strain Fracture Toughness KIc of Metallic Materials ASTM F 436/F 436M, Standard Specification for Hardened Steel Washers Inch and Metric Dimensions AWS D1.1/D1.1M, 23rd Ed. 2020, Structural Welding Code – Steel – Includes 2016 Errata BSI BS 7448 PART 1, Fracture Mechanics Toughness Test – Part 1: Method for Determination of KIc, Critical CTOD and Critical J Values of Metallic Materials BSI BS EN 10225, Weldable Structural Steels for Fixed Offshore Structures – Technical Delivery Conditions BSI BS EN ISO 15653, Metallic Materials – Method of Test for the Determination of Quasistatic Fracture Toughness of Welds

Rev

2024

2022

2018

2024

2023

2022

2024

2024

2024

2024

2024

2024

2024

23rd Ed

1991

2023

2018

200-20-ST-SPC-00029_01

Page 19 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

S. No.

[70]

[71]

[72]

[73]

REFERENCES

BSI BS EN ISO 19902, Petroleum and Natural Gas Industries – Fixed Steel Offshore Structures American Forest and Paper Association - Design Values for Wood Construction (supplement) American Forest and Paper Association - National Design Specification for Wood Construction Coast Guard memorandum entitled “Policy File memorandum of the Use of Fiber Reinforced Plastic (FRP) Gratings and Cable Trays.”

[74]

EN ISO 10204, Metallic products – Types of inspection documents

[75]

[76]

[77]

[78]

[79]

[80]

[81]

[82]

[83]

[84]

[85]

[86]

ASTM A29/29M, Standard Specification for General Requirements for Steel Bars, Carbon and Alloy, Hot-Wrought EN 338, Structural timber - Strength classes ASTM E709, Standard Guide for Magnetic Particle Testing

ASTM A392-11a, Standard Specification for Zinc-Coated Steel Chain- Link Fence Fabric BS EN 10225-1, Weldable Structural Steels for Fixed Offshore Structures – Technical Delivery Conditions, Part 1: Plates BS EN 10225-2, Weldable Structural Steels for Fixed Offshore Structures – Technical Delivery Conditions, Part 2: Sections BS EN 10225-3, Weldable Structural Steels for Fixed Offshore Structures – Technical Delivery Conditions, Part 3: Hot finished hollow sections BSI – BS EN 10160, Ultrasonic Testing of Steel Flat Product of Thickness Equal or Greater Than 6 mm EN ISO 10893-8:2021, Non-Destructive Testing Of Steel Tubes - Part 8: Automated Ultrasonic Testing Of Seamless And Welded Steel Tubes For The Detection Of Laminar Imperfections EN ISO 10893-10:2020, Automated full peripheral ultrasonic testing of seamless and welded (except submerged arc-welded) steel tubes for the detection of longitudinal and/or transverse imperfections BS EN 10025-2:2019, Hot rolled products of Structural Steel, Part 2: Technical delivery conditions for non-alloy structural steel BS EN 10210-1, Hot finished structural hollow sections of non-alloy and fine grain steels, Part 1: Technical delivery conditions

Rev

2020

2020

2016

2021

2022

2019

2019

2023

2000

2021

2020

2019

2006

200-20-ST-SPC-00029_01

Page 20 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

S. No.

[87]

[88]

REFERENCES

ASTM F3125/F3125M-22, Standard Specification for High Strength Structural Bolts and Assemblies, Steel and Alloy Steel, Heat Treated, Metric Dimensions 830 MPa and 1040 MPa Minimum Tensile Strength ASME B18.21.1, Washers: Helical Spring-Lock, Tooth Lock, and Plain Washers

[89]

DIN 127, Spring lock washers with square ends or tang ends

[90]

[91]

[92]

ASTM A 307, Standard Specification for Carbon Steel Bolts, Studs, and Threaded Rod 60 000 PSI Tensile Strength ASTM F844, Standard Specification for Washers, Steel, Plain (Flat), Unhardened for General Use ASTM F593, Standard Specification for Stainless Steel Bolts, Hex Cap Screws, and Studs

[93]

ASME B18.22.1-1965 (R2008), Plain Washers

Rev

2023

2009

1987

2023

2024

2024

2008

200-20-ST-SPC-00029_01

Page 21 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

4. PURPOSE OF THE DOCUMENT

The purpose of this specification is to define the requirements for manufacturing and testing of structural materials such as plates, section, seamless tubular, rolled and welded tubular and plate girders for offshore structures in jacket, piles, topsides structures, flare structures, bridge structures and the appurtenances attached to them.

5. GENERAL CONSIDERATION

This document defines the minimum requirements of structural materials to be considered and used for the NFPS Compression Project.

This specification only applicable for LAST down to -30°C. Impact testing for toughness classes containing CV2 requirements (e.g., CV2, CV2X, CV2ZX, CV2Z4 and CV2Z5) shall be conducted at 30°C below LAST.

If approved by COMPANY for applications with LAST ≤ -20°C, impact testing for toughness classes containing CV2 requirements (e.g., CV2, CV2X, CV2ZX, CV2Z4 and CV2Z5) may be conducted at 20°C below LAST on Class A steels per API RP 2A-WSD, Ref. [22].

Structural steel consist of pipe, plate and shapes manufactured shall be in accordance with the requirements brief in this document.

Protection of the structural steel before and during fabrication shall be such that it retains its physical configuration, strength and workability characteristics. Materials shall be stored aboveground on suitable skids or platforms and protected from the weather, dirt, grease, paint, spray and other foreign matter.

The structural steel shall be suitable for the environmental conditions specified.

Structural steel shapes, pipe and plate shall be new and straight, and free from laps, seams, scabs, rust and deformation. “New” shall mean not previously used in any fabricated section.

Certification sheets shall be furnished for all materials and shall include chemistry, mechanical properties, heat treatment and any additional data needed to show that the material is equivalent to the required API or ASTM specifications and their supplementary requirements.

200-20-ST-SPC-00029_01

Page 22 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

6. DESIGN PHILOSOPHY

6.1 Material Characterization

For the purpose of material selection and utilization in offshore structures, steels are characterized as belonging to a strength group and a toughness class.

Strength groups are defined by a range of yield strengths, which are determined by tensile testing of specimens in accordance with steel manufacturing specifications. The specified yield strength is a design criterion used to size members in accordance with selected design standards.

Toughness classes are determined by the ability of steels to achieve a minimum Charpy V-Notch (CVN) test energy at a specified minimum temperature.

Toughness becomes more important as the magnitude of varying actions increase, as the critically of the structure increases and as service temperatures decrease. The toughness of the steel affects the fracture resistance.

6.2 Material Selection Criteria

6.2.1 Yield Strength Requirements

The minimum yield strength for a given component geometry and thickness shall satisfy the strength requirements defined for all structural component related, in conjunction with the actions describes which related to all condition or situation (in-service, pre-service, removal, accidental and seismic).

6.2.2 Structure Exposure Level

The material selection shall take into account the structure’s exposure level. Structures can be categorized by various levels of exposure to determine criteria that are appropriate for the intended service of the structure. The levels are determined by consideration of life-safety and of environmental and economic consequences.

6.2.3 Component Criticality

In the selection of the appropriate material, consideration shall be given to the criticality of the component. A component (member or joint) is considered critical if it its sole failure is likely to lead to a catastrophic structural collapse. In general, the toughness requirements and inspection ensure that the material selected for a critical component has higher toughness and ductility requirements and more stringent inspection requirements than the material selected for a component with high redundancy, where alternative load paths in the structure lessen the risk of major failure.

6.2.4 Lowest Anticipated Service Temperature, LAST

The steel performance characteristics are affected by LAST. The LAST value to be used in the material selection shall be in accordance with applicable regulatory requirements in the region of application. For the purpose of this NFPS Compression Project COMP3, LAST was taken as:

• LAST = 0°C

• LAST is to be used for the general selection of materials unless local specific operating conditions

dictate otherwise.

200-20-ST-SPC-00029_01

Page 23 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

6.2.5 Other Considerations

Consideration shall be given to other factors, such as resistance to fracture in the presence of plastic deformation, residual stress, thickness restraint, cost, availability, weldability, resistance to lamellar tearing and demonstrated successful use.

6.3 Selection Process

The selection process and approach used for the NFPS Project COMP3 are described in Section 7.

Key parts of the process are the two methods described below:

• Material Category (MC) Approach

The MC approach, the steel selection is based on the interrelation of the structure’s exposure level, the material yield strength and toughness, and the component consequence ranking. Thickness is considered in connection with component type.

• Design Class (DC) Approach

The DC approach, it allows wider discretion in selecting the appropriate material strength group and toughness class on the basis of a component’s critically rating.

Either approach provides a framework for material selection, welding qualification and extent of inspection commensurate with the level of reliability implicit in the design process.

The selection process and approach used for the NFPS Compression Project are described in Section 7.

200-20-ST-SPC-00029_01

Page 24 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

7. STRENGTH GROUPS AND TOUGHNESS CLASSES

7.1 Strength Groups

Steels are grouped according to specified minimum yield strength (SMYS) as presented in table below.

Table 7-1 Steel Group SMYS Requirements

Yield Type

Yield Strength

Toughness Class

I

II

III

248 MPa (36 ksi)

NT, CV1,CV2, CV2Z4 and CV2Z5

345 MPa (50 ksi)

NT, CV1, CV2, CV2Z4, CV2Z5, CV2X and CV2ZX

413 MPa (60 ksi)

CV1, CV2, CV2Z4, CV2Z5, CV2X and CV2ZX

7.2 Toughness Classes

This section describes the toughness classes and the types of steel for which they are considered applicable. All testing shall conform to an internationally recognized standard.

• Class NT

Steels (not CVN tested) are considered suitable for application in critical welded components at service temperatures above 0 °C.

• Class CV1

Steels are suitable for use where service temperatures, thickness, cold work, restraint, stress concentration, impact loading and /or redundancy indicate the need for improved notch toughness.

• Class CV2

Steels at least tested at 30°C below LAST. Such steels are suitable for major primary structures or structural components and for critical or non-redundant components, particularly in the presence of factors such as:

• High stresses and stress concentrations

• High residual stresses

• Severe cold work from fabrication

Low temperatures

• High calculated fatigue damage

Impact loading

In addition to all the other characteristics of class CV2 steel, class CV2Z steels shall have through- thickness (short transverse direction) ductility for resistance to lamellar tearing caused by tensile stress in the direction of thickness.

Class CV2Z4

CV2 steels with through-thickness (short transverse direction) ductility for resistance to lamellar tearing caused by tensile stress in the direction of thickness. Such materials shall have limited Sulphur content and they are ultrasonically tested to verify the internal soundness of the material. Through-thickness ductility shall be demonstrated by having a minimum reduction in area of 30 % as per API 2W in a tension test conducted on specimens cut from the through-thickness direction.

200-20-ST-SPC-00029_01

Page 25 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

However, for EN steels, testing shall be as per EN10164 which then use Z35 category.

• Class CV2Z5

CV2 steels with limited Sulphur content aimed to improve the resistance to lamellar tearing caused by tensile stress in the direction of thickness.

• Class CV2X

CV2X steels with a formal CTOD pre-qualification and additional tensile test in addition to the other characteristics of CV2Z5. Refer to section 9.1.2 for API RP 2Z pre-qualification requirements and and Table 9-1 for essential variables.

• Class CV2ZX

CV2ZX steels with a formal CTOD pre-qualification in addition to the other characteristics of CV2Z4 as applicable. Refer to section 9.1.2 for API RP 2Z pre-qualification requirements and and Table 9-1 for essential variables

In addition to the above, further material requirements are addressed also by Section 13 in conjunction with the applicable international standards listed in Section 3.

8. MATERIAL SELECTION APPROACH

This approach is roughly based on BSI EN ISO 19902, Ref. [70], especially the designations for toughness categories and toughness testing requirements. The development of the selection tables is more closely tied to the Design Class approach of BSI EN ISO 19902, Ref. [70], rather than Material Category approach.

The material selection approach is to group structural members into categories relating to function.

Toughness and supplementary requirements have been assigned for three thickness ranges and three categories of steel strength (i.e. yield stress for each functional category).

The requirements provide a range of improved notch toughness, through-thickness properties and formal API RP 2Z, Ref. [23] CTOD pre-qualification to meet a variety of service conditions (i.e. high stresses, restraint, impact loading, fatigue, through-thickness loading, temperature, etc.) and also address relative importance of a member to the integrity of the structure.

Note that it may be practical in certain situations to specify a higher grade steel for an entire member rather than specifying several grades. In deciding which approach to adopt, the additional work should consider associated with fabricating a dual grade and possibly varying thickness member versus the higher material cost of using a single grade/constant thickness member.

The following tables summarized the material selection approach for deck structure and jacket structure.

200-20-ST-SPC-00029_01

Page 26 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Table 8-1 Material Selection for Topside Structure

Structural Category

Item Description

Yield Type

T < 19mm

19mm  T  50mm

TA

TB

TC

TD

TE

TF

TG

Nodes/Joint Cans Deck legs, Trusses, Girders, Flareboom, Bridge, joints under tension loads i.e tension Supports

Primary Members Deck legs, Truss chords, Truss diagonals, Girders, Flarebooms, Blast walls. Bridge chords and braces

Secondary Members Bracing, Floor beams, Deck plate Stiffeners

Crane Pedestal and supports

Lifting Points Padeye main plates and attachment points of the padeye to the structure

Outfitting Steel Walkways, Access platforms, Stairs, Ladders, Handrail and kickplates and grating supports, Minor equipment support, Miscellaneous support steel works

Miscellaneous Installation aids, bumpers, Fenders and guides, Closure plate

I II III

I II III

I II III

I II III

I II III

I II III

I II III

NA CV2 CV2

NT NT CV2

NT NT CV2

NA CV2Z5 CV2Z5

NA CV2Z5 CV2Z4

NT NT NA

NT NT NT

T > 50mm

NA CV2ZX(4) CV2ZX(6)

NA CV2Z4 CV2ZX

NT CV1 CV2Z5

CV1(2) CV2(2) CV2X(1)(6)

NT CV1 CV2

NA CV2ZX CV2ZX

NA CV2Z4 CV2ZX

NT NT NA

CV1(2) CV1(3) CV2Z5(5)

NA CV2ZX(4) CV2ZX(6)

NA CV2ZX(4) CV2ZX(6)

NT CV1(3) NA

NT CV1 CV1

CV1(2) CV1(3) CV2(5)

Notes:

(1) CV2ZX can be substituted where CV2X is required, but CV2X cannot be specified where CV2ZX

is required.

(2) The use of this CVN class is limited to 65MM unless stated in relevant material specification (3) The use of this CVN class is limited to 60MM unless stated in relevant material specification (4) The use of this CVN class is limited “grade-wise “ to the following maximum thickness:

• API SPEC 2Y = 150 mm (6 in.) • API SPEC 2W = 100 mm (4 in.) • BS EN 10225 = 100 mm (4 in.) • ASTM A 131/A 131M = 65 mm (2.5 in.)

200-20-ST-SPC-00029_01

Page 27 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

(5) The use of this CVN class is limited “grade-wise “ to the following maximum thickness:

• API SPEC 2Y = 100 mm (4 in.) • API SPEC 2W = 100 mm (4 in.) • API SPEC 5L X60 = 50 mm (2 in.) • BS EN 10225 = 100 mm (4 in.) • ASTM A 572/A 572M = 60 mm (2.375 in.) • ASTM A 131/A 131M = 60 mm (2.375 in.)

(6) The use of this CVN class is limited to 100mm

Table 8-2 Material Selection for Jacket Structure

Structural Category

Item Description

Yield Type

T < 19mm

19mm  T  50mm

JA

JB

JC

JD1

JD2

JE

JF

Joint Cans

Primary Members Diagonals, legs, Brace end stubs @ nodes Stiffeners @ nodes

Secondary Members Horizontal and conductor panel framing, knee braces

Piling Heavy wall at mud line

Piling Elsewhere

Stiffeners

Lifting Points Padeye main plates and attachment points of the padeye to the structure

I II III

I II III

I II III

I II III

I II III

I II III

I II III

NA CV2 CV2

NT NT CV2

NT NT CV1

NA NA CV2

NT NT CV1

NT CV1 CV1

NA CV2Z4 CV2ZX

NT CV1 CV2Z5

NT CV1 CV2Z5

CV2 CV2Z5 CV2Z5

NT CV1 CV2

NT CV1 CV2

NA CV2Z5 CV2Z4

NA CV2Z4 CV2ZX

T > 50mm

NA CV2ZX(4) CV2ZX(6)

CV1(2) CV2(2) CV2X(1)(6)

NA NA NA

CV2Z5 CV2X(1) (4) CV2X(1)(6)

CV1(2) CV2(2) CV2Z5(5)

NT CV1(3) CV2(5)

NA CV2ZX(4) CV2ZX(6)

200-20-ST-SPC-00029_01

Page 28 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Structural Category

Item Description

Miscellaneous Conductor panels, Boat landings, Mudmats, Launch cradle, caisson, caisson supports, J-tubes, J- tubes supports, Guards, Buoyancy tanks & tank supports/connection to jacket, Installation aids, bumpers, Fenders and guides, Closure plate

Miscellaneous Crowns

Outfitting Steel Walkways, Access platforms, stairs, ladders

JG

JH

JI

Notes:

Yield Type

I II III

T < 19mm

19mm  T  50mm

T > 50mm

NT NT NT

NT CV1 CV1

CV1(2) CV1(3) CV2(5)

I II III

I II III

NA CV2 CV2

NT NT NA

NA CV2Z5 CV2ZX

NT NT NA

NA CV2ZX CV2ZX

NT CV1 NA

(1) CV2ZX can be substituted where CV2X is required, but CV2X cannot be specified where CV2ZX is required.

(2) The use of this CVN class is limited to 65MM unless stated in relevant material specification (3) The use of this CVN class is limited to 60MM unless stated in relevant material specification (4) The use of this CVN class is limited “grade-wise “ to the following maximum thickness:

• API SPEC 2Y = 150 mm (6 in.) • API SPEC 2W = 100 mm (4 in.) • BS EN 10225 = 100 mm (4 in.) • ASTM A 131/A 131M = 65 mm (2.5 in.)

(5) The use of this CVN class is limited “grade-wise “ to the following maximum thickness:

• API SPEC 2Y = 100 mm (4 in.) • API SPEC 2W = 100 mm (4 in.) • API SPEC 5L X60 = 50 mm (2 in.) • BS EN 10225 = 100 mm (4 in.) • ASTM A 572/A 572M = 60 mm (2.375 in.) • ASTM A 131/A 131M = 60 mm (2.375 in.)

(6) The use of this CVN class is limited to 100mm

8.1 Material Substitution

The material with higher CVN class can substitute the application of lower CVN class as per the design requirements.

200-20-ST-SPC-00029_01

Page 29 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Whenever there is a substitute of material by higher grade, WPS to be selected accordingly.

The below CVN class order (highest to lowest) shall be considered for substitution:

• CV2ZX (highest CVN toughness class) • CV2X • CV2Z4 • CV2Z5 • CV2 • CV1 • NT (lowest CVN toughness class)

Any material when substituted shall fully comply with the requirements of the substituted CVN class.

The detail table describing the permissible substitution is listed below:

Table 8-3 Permissible Material Substitutions

No. Substitution CVN Class

Design Requirement CVN class

CV2X CV2Z4 CV2Z5 CV2 CV1

NT

√

√

1

2

3

4

5

6

CV2ZX

CV2X

CV2Z4

CV2Z5

CV2

CV1

√

√

√

√

√

√

√

√

√

√

√

√

√

√

√

√

√

√

Note: ‘√’ indicates applicable for substitution

200-20-ST-SPC-00029_01

Page 30 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

9. MATERIALS

9.1 Steel Material

9.1.1 General

All steel shall be produced and delivered in accordance with the requirements of ASTM A 6/A 6M, Ref. [33] or ASTM A 20/ASTM A 20M , Ref. [34] as applicable and shall, and shall meet the requirements of this specification. Standard Charpy test temperature and energy requirements shall be satisfied even if the requirements are more lenient. Any changes to steel delivery requirements shall be approved by COMPANY prior to procurement.

Boron and Nitrogen shall not be intentionally added to any steel.

Handrails and other miscellaneous items shall be one of the following materials:

• API SPEC 5L Grade B

• ASTM A 53/A 53M Grade B

• ASTM A 106/A 106M Grade B

Stair treads shall be fabricated from serrated bar grating or shall be manufactured steel treads with abrasive nosing (e.g. Grip Strut). The same type of stair tread shall be used throughout the platform.

All steel shall meet the minimum additional requirements specified in the Section 11, “Material” Section of API RP 2A-WSD, Ref. [22].

9.1.2 API RP 2Z Pre-Qualification

For steels designated Toughness Class CV2X and CV2ZX, pre-qualification shall be required in accordance with API RP 2Z.

For the non-API material grades recommended by this specification for CV2X/CV2ZX classes (i.e. EN 10225 material grades), API RP 2Z is not applicable. For such material grades option 17 shall be specified and the Pre- Qualification shall be provided in accordance with the technical requirements given in Annex B of EN 10225, Ref. [68].

If API RP 2Z pre-qualification has been specified, the following applies:

• Prior to the start of full production, manufacturer shall produce a pre-qualification plate of the maximum thickness specified for each Specified Minimum Yield Strength (SYMS) to be provided.

• The pre-qualification plate shall be fully tested and inspected for compliance with all

requirements of API RP 2Z, Ref. [23].

• The prior qualification record or historical weldability data performed by

the Manufacturer/Plate mill in lieu of performing new preproduction qualification is acceptable and shall be within the compliance of API RP 2Z.

• Once pre-qualification plate has been successfully accomplished, the manufacturing steps and process control variables for production plate shall be documented in a

200-20-ST-SPC-00029_01

Page 31 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

proposed Manufacturing Procedure Specification (MPS) to be approved by COMPANY prior to production. In case of stock materials, the existing weldability data may suffice.

• The variables shall conform to the essential variable range tolerances of API RP 2Z, Ref.

[23] and list as per Table 9-1 below.

• Rolled shapes cannot be pre-qualified to API RP 2Z Ref. [23] and where CV2Z or CV2ZX

is designated, fabricated beams shall be required.

Table 9-1 Essential Variables for CV2X and CV2ZX

No.

List of Essential Variables

1 Specific plate-rolling mill and steel product facility

2 Specific steel-making method or melting practice (EAF-VD, BOF-LRF-VD, etc.), hot- metal charge, nominal weight or heat, and any hot-metal treatment (degassing, desulfurization, injection refining, etc.)

3 Method of inclusion shape control and procedure for verifying metallurgical

effectiveness

4 Chemical composition (including limits on residual elements) and maximum Pcm

5 Casting method (top poured ingot, bottom-poured ingot, or continuous), usage of

argon shrouding, and implementation of strand-cast soft reduction

6 Segregation-control procedures (electromagnetic stirring, electromagnetic braking, etc.) and segregation quality-control procedures (sulfur and phosphorous prints of slab cross sections and testing frequency) for continuous-cast product

7 Continuous cast slab thickness or ingot size and weight and relationship to plate

thickness

8 Slab-reheat temperature and time at temperature

9 Roughing-mill start and finish temperature and total reduction

10 Finishing mill or controlled rolling start and finish temperature

11 Total reduction

12 Normalizing temperature and time (API SPEC 2H)

13 Austenitizing temperature and time (API SPEC 2H/API SPEC 2Y)

14 Plate temperature at start of accelerated cooling or direct quenching (API SPEC 2W)

15 Plate temperature at finish of accelerated cooling or direct quenching and method of

controlling (API SPEC 2W)

16 Tempering temperature and time at temperature and its relationship to the chemical

composition (API SPEC 2Y)

200-20-ST-SPC-00029_01

Page 32 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

9.1.3 Hot-Dip Galvanized Items

Hot-dip galvanizing shall be performed in accordance with Structural Steelwork Hot Dip Galvanising, Specification Ref.[8].

The following items shall be hot-dip galvanized after fabrication:

• Handrails, Handrail Sockets, Stairways, Ladders • Helideck, Apron Frames • Electrical and Instrumentation Brackets • Miscellaneous Hardware

9.1.4 Plates, Rolled Shapes and Structural Material

Steel plates and rolled shapes and structural material shall be free of rolling defects, burrs, rough spots, and other surface imperfections as defined by the applicable material standard.

Surface finish for steel surfaces shall be such that only blasting and no grinding is required to achieve a surface acceptable for painting. All remedial grinding shall be at manufacturer expense.

All structural steel shall not exceed as tensile strength of 620 MPa or the applicable ASTM or API specification.

All floor plate shall conform to the requirements of ASTM A 36/A 36M, Ref.[35]. Higher material grades, listed as recommended grades in this specification, may be used for floor plating of heavy loaded deck areas (e.g handling ways or laydown areas).

9.1.4.1 Centerline Segregation Requirements

For mill orders of CV2X, CV2ZX and CVZ4 plate steels, the method of controlling and monitoring centreline segregation shall be specified within the MPS.

CONTRACTOR shall submit a macro-etch procedure to COMPANY for review and approval through MPS.

The frequency of sampling and macro-etch acceptance criteria shall be subject to evaluation by COMPANY.

9.1.4.2 Plate Edges

Plate edges shall be even, smooth and free of laminations.

Edge shearing of plates > 25mm thickness requires COMPANY approval. Edge shearing of plates > 40mm thickness shall not be permitted. This requirement may be waived with written COMPANY permission, if one of the following provisions are met:

• Manufacturer can demonstrate the use of adequate technologies to avoid deterioration of

plate edges.

• Plates are delivered oversized at no extra cost. The oversize shall consider +20mm all

edges as minimum, unless specified otherwise.

200-20-ST-SPC-00029_01

Page 33 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

9.1.4.3 Tubulars

Fabricated pipe furnished to this specification shall comply with API SPEC 2B, Ref.[24] and Specification for Offshore Steel Structures, Welding and Inspection for COMP3 project Ref.[9].

CVN impact testing shall be performed on transverse specimens in accordance with ASTM A 370, Ref.[44]. Acceptance criteria shall be as stated on the material specification tables in Section 12.

Dimensional tolerances of individual tubular sections 457mm and above shall be in accordance with API SPEC 2B, Ref.[24]. Tubular between 457mm and 914mm for use in shallow water (i.e. ≤ 500m) and purchased in small quantities from existing stocks may be to API SPEC 5L, Ref.[29] tolerances with COMPANY approval.

A maximum of 1.5% cold expansion shall be allowed.

Spiral welded pipe shall not be used for structural applications.

Electric Resistance Welded (ERW) pipe shall not be utilized unless all of the following criteria are met:

• Wall thickness is ≤ 19mm

• Steel is Yield Class I

• High frequency welding is utilized for the longitudinal seam

• Application is not for primary or secondary structural members.

Only Submerged Arc Welded (SAW) or Double Submerged Arc Welded (DSAW) tubulars welded with a qualified procedure in accordance with Specification for Offshore Steel Structures, Welding and Inspection for COMP3 project Ref.[9] or seamless pipe, are acceptable for structural use.

ASTM A 500 structural tubing may be used in Steel Group I only. Careful attention shall be given to the precautionary notes in AWS D1.1/D1.1M, Ref. [66] ASTM A 500 Gr B structural tubing shall not be used on the blast wall.

Hydrostatic testing of structural tubulars is not required. Rolled tubulars shall not have more than one longitudinal seam.

For purposes of verification or for referee measurements where tolerances are disputed, diameter measurements of pipe sizes 508mm and smaller shall be made with a snap gauge, caliper or other device that measures actual diameter across a single plane.

9.1.5 CTOD Testing for Toughness Class CV2X and CV2ZX

All steel plate designated Toughness Class CV2X and CV2ZX shall meet the following:

• Manufactured by a steel mill qualified in accordance to API RP 2Z, Ref. [23] Preproduction

Qualification

• Supplied in accordance to API RP 2Z, Ref. [23]

• Supplied by Mill that has demonstrated and fully documented compliance

200-20-ST-SPC-00029_01

Page 34 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

• Mill shall provide full documentation to COMPANY showing all test result including metallographic examination of heat-affected-zone sampled, Charpy transition curves and weldability test results, prior to production of steel.

• CTOD testing shall be conducted at LAST or lower.

For EN 10225 Steel the following additional requirements shall apply:

1. Option 17 Appendix B applies for steel weldability qualification, with CTOD acceptance criteria as follows:

Gr50 & T= max 76mm: min 0.25%, Gr50 & T over 76mm: min 0.38%

Gr60 & T = max 76mm: min 0.30%, Gr60 & T over 76mm: min 0.38%

2. Validation of CTOD HAZ specimens. Unless more stringent requirements is specified in the relevant testing standard, shall confirm that:

• min 75% of central 2/3 crack length shall be in HAZ

• for CGHAZ: Min 15% of the central 2/3 of the crack length shall be located in CGHAZ

• for SCHAZ/ICHAZ: Min 50% of the central 2/3 of the crack length shall be located in SCHAZ/ICHAZ

3. Hardness test acceptance criteria: weld metal hardness shall exceed base metal hardness.

4. In addition to EN Option 17 chemistry qualified range regulations, Plate manufacturing process variables specified in the above Table 9-1 shall be part of the weldability records and their qualified range for actual plate manufacturing shall be as per APIRP2Z table 2.

A different variable range for manufacturing parameters may be proposed for acceptance to CPY along with detailed technical justification aimed to ensure that the proposed range does not lead to decrease in plate quality.

9.1.6 Through-Thickness (Z-direction) Test for CV2X and CV2ZX

When Toughness Class CV2Z4 is specified, both API Supplementary Requirement SR-5 (Low Sulfur Steel Improved Through-Thickness Properties) and Supplementary Requirement SR-4 (Through-Thickness Z-Direction Testing) apply and shall conform to API SPEC 2W, Ref. [27] or API Spec 2Y, Ref. [28] or API Spec 2H, Ref. [25] . When Toughness Class CV2Z5 is specified, only API Supplementary Requirement SR-5 applies.

for

Results from all through-thickness tensile tests, including failures, shall be reported in the certification documents.

For EN 10225 steel, Option 3 instead of SR-5 and Option 12 instead of SR-4 shall apply.

Refer Appendix-3 for Comparison of API vs EN steel optional and supplementary requirements equivalency.

200-20-ST-SPC-00029_01

Page 35 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

9.2 Designation of Steel

The designation of steel for each component of the structures shown in the structural drawings shall be specified with steel type as defined in Section 7 and Section 8.

Refer Appendix-1 for Comparison of API vs EN specifications, Appendix-2 for Comparison of properties for ASTM/API vs ISO grades and Appendix-3 for Comparison of API vs EN steel optional and supplementary requirements equivalency.

200-20-ST-SPC-00029_01

Page 36 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Table 9-2 Steel Type for Topsides Structure

Plates

Seamless Tubular

Shapes

Toughness Class

Application/Usage

Yield Type

Struc. Cat.

III (60 ksi)

A

API 2W Gr 60 (SR-1, SR-4, SR-5 & SR-6)

API 2Y Gr 60 (S-1, S-4, S-5 & S-8)

BS EN10225 S460G1+Q BS EN10225 S460G2+Q

III (60 ksi)

B

API 2W Gr 60 (SR-1, SR-4, SR-5 & SR-6)

API 2Y Gr 60 (S-1, S-4, S-5 & S-8)

BS EN10225 S460G1+Q BS EN10225 S460G2+Q

III (60 ksi)

D

API 2W Gr 60 (SR-1, SR-4, SR-5 & SR-6

API 5L X60 (S-5)

API 2Y Gr 60 (S-1, S-4, S-5 & S-8)

BS EN10225 S460G1+Q

BS EN10225 S460G2+Q

T < 19mm - CV2

19mm ≤ T ≤ 50mm - CV2ZX

T > 50mm - CV2ZX

Nodes/Joints Cans: Deck legs, Trusses, Girders, Flareboom, Bridge, joints under tension loads i.e tension Supports

T < 19mm - CV2

19mm ≤ T ≤ 50mm - CV2Z5

T > 50mm - CV2X

Primary Members: Deck legs, Truss chords, Truss diagonals, Girders, Flarebooms, Bridges, Blast walls

Crane Pedestal and supports

T < 19mm - CV2Z5

19mm ≤ T ≤ 50mm - CV2ZX

T > 50mm - CV2ZX

200-20-ST-SPC-00029_01

Page 37 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Yield Type

Struc. Cat.

II (50 ksi)

A

Plates

API 2H Gr 50 (S-1, S-4 & S-5)

API 2W Gr 50 (SR-1, SR-3, SR-4 & SR-5 & SR-9 for T>50 mm)

BS EN10225 S355G7+N BS EN10225 S355G8+N BS EN10225 S355G7+M BS EN10225 S355G8+M

Seamless Tubular

Shapes

Toughness Class

Application/Usage

API 5L X52 (S-1, S-4 & S-5)

ASTM A572 Gr 50 (S-1, S-4 & S-5)

T < 19mm - CV2

19mm ≤ T ≤ 50mm - CV2Z4

T > 50mm - CV2ZX

Nodes/Joints Cans: Deck legs, Trusses, Girders, Flareboom, Bridge, joints under tension loads i.e tesnsion supports

II (50 ksi)

II (50 ksi)

B

API 2H Gr 50

API 5L X52

ASTM A572 Gr 50

T < 19mm - NT

BS EN10225 S355G2+N

BS EN10225 S355G11

19mm ≤ T ≤ 50mm – CV1

BS EN10225 S355G7+N

BS EN10225 S355G8+N

BS EN10225 S355G11+N

T > 50mm - CV2

C

API 2H Gr 50

API 5L X52

ASTM A572 Gr 50

T < 19mm - NT

BS EN10225 S355G2+N

BS EN10225 S355G11

19mm ≤ T ≤ 50mm – CV1

BS EN10225 S355G7+N

BS EN10225 S355G11+N

T > 50mm – CV1

Primary Members: Deck legs, Truss chords, Truss diagonals, Girders, Bridges, Flarebooms, Blast walls

Secondary Members: Bracing, Floor Beams and Deck Plate

200-20-ST-SPC-00029_01

Page 38 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Seamless Tubular

API 5L X52 (S-5)

Shapes

Toughness Class

Application/Usage

T < 19mm – CV2Z5

Crane Pedestal and supports

19mm ≤ T ≤ 50mm – CV2ZX

T > 50mm – CV2ZX

Yield Type

Struc. Cat.

II (50 ksi)

D

Plates

API 2H Gr 50 (S-5) API 2W Gr 50 (SR-5) API 2W Gr 50 (SR-1, SR-3, SR-4, SR-5 & SR-9 for T>50 mm)

BS EN10225 S355G7+N BS EN10225 S355G8+N

BS EN10225 S355G7+M

BS EN10225 S355G8+M

II (50 ksi)

E

API 2H Gr 50 (S-1, S-4 & S-5)

T < 19mm – CV2Z5

Lifting Points

API 2W Gr 50 (SR-1,SR-3, SR-4,SR-5 & SR-9 for T>50 mm)

BS EN10225 S355G7+N

BS EN10225 S355G8+N

BS EN10225 S355G7+M

BS EN10225 S355G8+M

19mm ≤ T ≤ 50mm – CV2Z4

T > 50mm – CV2ZX

200-20-ST-SPC-00029_01

Page 39 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Yield Type

Struc. Cat.

II (50 ksi) I (36 ksi)

F

C

Plates

Seamless Tubular

Shapes

Toughness Class

Application/Usage

API 2H Gr.50

API 5L X52

ASTM A572 Gr.50

NT

Out-Fitting Steel

ASTM A36

API 5L Gr B

ASTM A36

T < 19mm – NT

19mm ≤ T ≤ 50mm – NT

T > 50mm – CV1

Secondary Members: Bracing, Floor Beams and Deck Plate

I (36 ksi)

F

ASTM A36

API 5L Gr B

ASTM A36

NT

Out-Fitting Steel

200-20-ST-SPC-00029_01

Page 40 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Table 9-3 Steel Type for Jacket Structure

Yield Type II (50 ksi)

Struc. Cat. A

Plates

API 2H Gr 50 (S-1, S-4 & S-5)

Seamless Tubular

API 5L X52 (S-1, S-4 & S-5)

API 2W Gr 50 (SR-1, SR-3, SR-4 & SR- 5 & SR-9 for T>50 mm)

BS EN10225 S355G7+N BS EN10225 S355G8+N BS EN10225 S355G7+M BS EN10225 S355G8+M API 2H Gr 50

II (50 ksi)

B

Shapes

Toughness Class

Application/Usage

T < 19mm – CV2

Joint Cans and joints under Tension loads

19mm ≤ T ≤ 50mm – CV2Z4

T > 50mm – CV2ZX

API 5L X52

ASTM A572 Gr 50

T < 19mm – NT

API 2W Gr 50

BS EN10225 S355G11

19mm ≤ T ≤ 50mm – CV1

BS EN10225 S355G2+N

BS EN10225 S355G11+N

T > 50mm – CV2

BS EN10225 S355G7+N

BS EN10225 S355G8+N API 2H Gr 50

C

II (50 ksi)

API 5L X52

ASTM A572 Gr 50

T < 19mm – NT

BS EN10225 S355G2+N

BS EN10225 S355G11

19mm ≤ T ≤ 50mm – CV1

Primary Members: Legs, Diagonals, Brace End Stubs @ Nodes, Stiffener @ Nodes

Secondary Members: Horizontal and Knee Braces

II

D1

BS EN10225 S355G7+N API 2H Gr 50 (S-5)

BS EN10225 S355G11+N

T > 50mm – NA T < 19mm – NA

Piles:

200-20-ST-SPC-00029_01

Page 41 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Yield Type (50 ksi)

Struc. Cat.

Plates

Seamless Tubular

II (50 ksi)

D2

BS EN10225 S355G7+N BS EN10225 S355G8+N BS EN10225 S355G7+M BS EN10225 S355G8+M API 2H Gr 50

BS EN10225 S355G2+N

BS EN10225 S355G7+N

BS EN10225 S355G8+N

II (50 ksi)

E

API 2H Gr 50

API 2W Gr 50

BS EN10225 S355G2+N

BS EN10225 S355G7+N

Shapes

Toughness Class

Application/Usage

19mm ≤ T ≤ 50mm – CV2Z5

Heavy Wall at Mud Line

T > 50mm – CV2X

T < 19mm – NT

Piles: Elsewhere

19mm ≤ T ≤ 50mm – CV1

T > 50mm – CV2

T < 19mm – CV1

Stiffeners

19mm ≤ T ≤ 50mm – CV1

T > 50mm – CV1

II (50 ksi)

G

API 2H Gr 50

API 5L X52

ASTM A572 Gr 50

T < 19mm – NT

BS EN10225 S355G2+N

BS EN10225 S355G11

19mm ≤ T ≤ 50mm – CV1

II

H

BS EN10225 S355G7+N API 2H Gr 50

BS EN10225 S355G11+N

T > 50mm – CV1 T < 19mm – CV2

Miscellaneous: Boat Landings, Walkways, Mudmats, Pile Shims and Launch Cradle Miscellaneous:

200-20-ST-SPC-00029_01

Page 42 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Yield Type (50 ksi)

Struc. Cat.

Plates

(S-1, S-4 & S-5)

Seamless Tubular

API 2W Gr 50 (SR-1, SR-3, SR-4, SR-5 & SR-9 for T>50 mm)

BS EN10225 S355G7+N

BS EN10225 S355G8+N

BS EN10225 S355G7+M

BS EN10225 S355G8+M

Shapes

Toughness Class

Application/Usage

19mm ≤ T ≤ 50mm – CV2Z5

T > 50mm – CV2ZX

Crowns

II (50 ksi)

I (36 ksi)

I (36 ksi)

I

API 2H Gr.50

API 5L X52

ASTM A572 Gr.50

T < 19mm – NT

BS EN10225 S355G2+N

BS EN10225 S355G7+N

BS EN10225 S355G11

19mm ≤ T ≤ 50mm – NT

BS EN10225 S355G11+N

T > 50mm – CV1

C

ASTM A36

API 5L Gr B

ASTM A36

T < 19mm – NT

19mm ≤ T ≤ 50mm – NT

T > 50mm – NA

Out-Fitting Steel: Walkways, Access Platforms, Stairs and Ladders

SECONDARY MEMBERS: Horizontal and Knee Braces

E

ASTM A36

API 5L Gr B

ASTM A36

NT

Stiffeners

200-20-ST-SPC-00029_01

Page 43 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Yield Type I (36 ksi)

Struc. Cat. G

Plates

Seamless Tubular

Shapes

Toughness Class

Application/Usage

ASTM A36

API 5L Gr B

ASTM A36

T < 19mm – NT

19mm ≤ T ≤ 50mm – NT

T > 50mm – CV1

Miscellaneous: Boat Landings, Walkways, Mudmats, Pile Shims and Launch Cradle

Out-Fitting Steel: Walkways, Access Platforms, Stairs and Ladders

I (36 ksi)

I

ASTM A36

API 5L Gr B

ASTM A36

NT

200-20-ST-SPC-00029_01

Page 44 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

10. IDENTIFICATION, MARKING AND DOCUMENTATION

10.1

Identification and Marking of Steel

All material shall be identified with coded markings, which include the name of the producer, the steel grade, the heat number, the direction of rolling and plate number in accordance with ASTM A 6/A 6M, Ref. [33] or ASTM A 20/ A 20M, Ref. [34] plus marked with the MDC in accordance with this specification.

ASTM A6 and A20 marking requirements shall not followed by the EN material grades recommended by this specification for which the requirements by the relevant material standard shall apply

All identification markings shall be clearly visible capable to remain intact and legible till storage at the fabrication yard material warehouse. When specified by COMPANY, additional identification markings shall be required.

For each plate produced in accordance with API RP 2Z, Ref. [23] the plate shall be marked “API RP 2Z”.

CONTRACTOR shall develop and provide COMPANY with a copy of its material identification system for review and approval. The material identification procedure shall identify each structural member and trace it back to the original test certificate – from receipt and storage through sub-assembly and final erection.

10.2 Documentation Requirements

10.2.1 General

Documentation shall meet the following requirements:

• CONTRACTOR shall submit material receiving reports to COMPANY

• These reports shall verify delivery of all COMPANY furnished materials as the material

arrives at CONTRACTOR’s fabrication yard during construction

• The receipt of such material shall be documented as follows:

o Materials received shall be itemized

o Materials received shall be tallied against the shipping manifest

o Each shortfall, excess or exactness shall be verified upon receipt via the witness and

signature of COMPANY Representative

o All discrepancies shall be noted

• CONTRACTOR shall ensure that a shipping manifest is furnished for all deliveries to the

site. The shipping manifest shall detail all items in a shipment.

• The shipping manifest shall be checked against the shipment and verified by CONTRACTOR. COMPANY shall retain the option to have COMPANY Representative witness such check and verification.

200-20-ST-SPC-00029_01

Page 45 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

10.2.2 Material Test Reports, MTR

CONTRACTOR shall furnish COMPANY with copies of MTR and tests for all steel before the material is used.

CONTRACTOR shall check all MTR for compliance to this specification.

Stock plate shall bear mill heat numbers for identification.

MTR shall include data for chemical analysis, mechanical and non-destructive examinations and shall be identified by heat number, purchase order number, mill identification number and such special information as “fully killed” and “made to fine grain practice”.

MTR for mill orders shall include the chemical analyses for copper, niobium (columbium), chromium, nickel, molybdenum, vanadium and nitrogen. When the amount of an element is less than 0.010% the analysis may be reported as less than 0.01%.

For plate produced specifically for this project and in accordance with API RP 2Z, Ref. [23] the MTR shall have the words “prequalified in accordance to API RP 2Z” stamped on each certificate along with the signature of the authorized COMPANY Representative. If testing temperatures vary from those specified in API RP 2Z Ref. [23], the actual testing temperatures shall be specified.

COMPANY shall not accept any work performed unless MTR are submitted that meet the applicable API or ASTM material specification, and the additional requirements given in this specification, or until the material has been retested to confirm compliance in accordance with this specification.

The following certification levels in accordance with ISO 10204, Ref. [74] shall apply:

Certification level

Toughness Class

3.1

3.2

NT, CV1

CV2, CV2Z4, CV2Z5, CV2X and CV2ZX

200-20-ST-SPC-00029_01

Page 46 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

11. TRACEABILITY, SHIPPING AND STORAGE

11.1 Material Traceability Program

CONTRACTOR shall develop and implement a material traceability program. Prior to material receipt and any fabrication work beginning, a procedure incorporating all of the requirements shall be developed in accordance to this specification and submitted to COMPANY for review and approval.

Explicit material traceability is required for Yield Type II and III CV2, CV2Z4, CV2Z5, CV2X and CV2ZX materials.

Documentation shall allow records to be traced for all steel (including fabricated tubulars, pipes, structural shapes, and plates). Such documentation shall clearly trace each piece to its MTR, dimensional test records and weld inspection records.

Bulk traceability shall be required for Yield Type I, II and III steels, Toughness Class CV1 and NT materials.

CV1 and NT materials shall be purchased, stored, erected and welded according to COMPANY specifications; however, no permanent documentation is required to document traceability of material or welding inspections.

Records shall be organized during fabrication and for final submittal to enable timely retrieval off all records for a given piece.

11.1.1 Material Description Code, MDC for Steels

The material traceability procedure shall meet all the requirements stated in this section.

All structural steel shall be marked with a MDC. The MDC shall contain, as minimum the following information:

• Structural Category • Yield Type • Thickness Designator • Manufacturing Process

Structural category shall use the designation of TA, TB, TC, etc. or JA, JB, JC etc. in accordance with Table 8-1 and Table 8-2 as applicable.

Yield type shall use the designation of I, II, or III in accordance with Table 8-1 or Table 8-2 as applicable.

Thickness designator shall use the letters X, Y or Z based on the following:

• X = T < 19 mm • Y = 19 mm ≤ T ≤ 50 mm • Z = T > 50 mm

Manufacturing process shall use the following letters for the type of manufacture of the materials:

• T = TMCP

200-20-ST-SPC-00029_01

Page 47 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

• N = Normalized • Q = Quench and Tempered • H = Hot Rolled

The following examples illustrates the use of a MDC for a Node can of API 2W material, 345 MPa yield strength with a thickness of 38 mm: Example: JA – II – Y – T

11.1.2 Shipping Requirements for Miscellaneous Materials

CONTRACTOR shall prepare all miscellaneous materials for export shipment.

Miscellaneous materials shall be crated in a manner to provide maximum protection for shipment and storage and shall meet the requirements of Section 5.6.5 of this Specification.

CONTRACTOR shall provide the following additional items for each item they furnish:

1. Full fabrication drawings, including description of all materials and coatings

2. Detailed instructions for offshore installation

3. Total weight of each assembly

All equipment and component parts shall be warranted by CONTRACTOR against defective materials, design, and workmanship for 1 year after being placed in service, not to exceed 36 months after date of shipment.

200-20-ST-SPC-00029_01

Page 48 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

12. QUALITY ASSURANCE PROVISIONS

All defective, non-certified or improperly placed material shall be removed and replaced, at CONTRACTOR expense, by material satisfactory to COMPANY. This shall apply to all material, both before and after it is placed in the structure.

12.1 Hot and Cold Forming

Fabricated pipe may be hot-formed or cold-formed.

A method or procedure shall be considered hot forming when material is deformed by line heating or external force while at a surface temperature greater than 427 °C.

12.1.1 Cold Forming

Cold forming strain shall be calculated by equation below.

Where:

E

t

= Cold forming strain in percent

= Plate thickness

OD = Outside diameter of member

If cold forming strain exceeds 5%, a cold forming procedure shall receive written COMPANY approval before forming proceeds.

For CV2X, CV2ZX, CV2, CV2Z5 and CV2Z5 steels, a cold forming procedure qualification is required. The as-formed plate shall satisfy all mechanical tests specified in the API, ASTM or EN specifications and any Supplemental Requirements contained herein. Considering the highest plastic strain expected during rolling activities, the mill to perform the mechanical tests on the as-formed plates based on toughness class.

Strain aging tests of CV2X, CV2ZX, CV2, CV2Z4 and CV2Z5 steels shall be performed on plates when the plastic strain is expected to exceed 5.0% ((OD-t)/t < 20), at a frequency of one test per heat by the Plate Mill, and the following requirements:

• Charpy V-notch (CVN) impact test shall be run on specimens removed after straining

and subsequent aging at 250 °C for one hour.

• Transverse Charpy specimens shall be used.

• See list of tables in Section 13 for required CVN impact energy test temperature.

• The test shall be performed by plate Mill on the most highly strained material in each

heat.

•

If material from each heat cannot be traced, then all heats shall be tested at the maximum possible strain.

200-20-ST-SPC-00029_01

Page 49 of 79

100tODtE−=

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

12.1.2 Hot Forming

Prior to hot forming, written hot-forming procedure shall submit to COMPANY for review and approval. Written approval of the procedure from the Steel Manufacturer shall be included.

The as-formed plate shall satisfy all mechanical tests specified in the API and ASTM Specifications and any Supplemental Requirements contained herein.

Steel shall not be heated between the upper and lower critical temperatures, and forming in the range between 254 °C and 427 °C shall not be permitted.

If the forming temperature exceeds 648 °C for as-rolled or normalized steel or is 27.7 °C less than the tempering temperature for quenched and tempered steels, then:

• Mechanical property tests shall be run to ensure that steel mechanical properties conform to applicable API or ASTM specifications and the additional requirements given, see list of tables in Section 12. The tests shall be the same as required by the plate steel specifications.

•

If the results are satisfactory, no further tests shall be required unless the forming temperature is increased.

12.2 Ultrasonic Inspections of Through-Thickness Plate

Plates for which through-thickness tensile testing have been specified shall be ultrasonically examined.

CONTRACTOR shall submit the Ultrasonic examination system details to COMPANY for review and approval.

Ultrasonic reference standards shall be carbon or low alloy steel, which is acoustically similar to the plate being inspected.

Results of all ultrasonic examinations shall be included in the certification documents.

Plates

For API material grades recommended by this specification, plates shall be tested in accordance with ASTM A 578/A 578M, Ref. [51]. UT acceptance standard shall be per ASTM A 578/A 578M Ref. [51], Level C, Supplementary Requirement SR-1 (100% scanning).

For EN material grades recommended by this specification plates shall be tested in accordance with EN 10160 UT acceptance standard shall be per EN 10225 option 18, refer to section 14.2 EN Steel Optional Requirements of this specification.

Seamless Pipes

For API material grades recommended by this specification, pipes shall be subjected to ultrasonic test according to API SPEC 5L - Annex E. Below the detail of the applicable standards for UT and the relevant acceptance criteria:

• EN ISO 10893-10 level U2/C (longitudinal and transverse defects on OD/ID surfaces

• EN ISO 10893-8 level U2 (laminations)

200-20-ST-SPC-00029_01

Page 50 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

• The full length of SMLS pipes shall be ultrasonically tested. Non inspected ends, if any, shall be either manually ultrasonically tested or cut off, according to the practice applied by the manufacturing mill.

12.3 Steel Manufacturer Inspections

COMPANY shall have the right to visit Steel Manufacturer’s plant at COMPANY expense to ensure that the materials are produced and tested according to the specification requirements.

Manufacturer shall provide COMPANY with at least 14 days advance notice before production proceeds.

12.4 Preparation for Shipping and Storage

Preparation for shipping and storage shall comply with the requirements that the materials shall retain their final configuration, appearance, and strength characteristics.

CONTRACTOR shall repair all damage to the structure(s), equipment, and protective coatings that occurs during the loadout or tie-down.

200-20-ST-SPC-00029_01

Page 51 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

13. MATERIAL SPECIFICATION TABLES

1. Table 13-1 through Table 13-10 define the material specifications and requirements for

each Yield and Toughness Class.

2. CONTRACTOR shall specify and purchase steels identified in Table 13-1 through Table

13-10 in accordance with this specification.

3. This specification and Table 13-1 through Table 13-10 represent the minimum

requirements for structural steel plate, shapes, and pipe.

4. The requirements in this specification and its tables are not intended to address the range

of possible weldability and weld toughness issues that may arise.

5. CONTRACTOR shall consider his ability to fabricate steel and the effects of welding procedures, welding controls, required preheat, welding process, weld metal strength, weld metal hydrogen, steel thickness, restraint, etc., when ordering steel.

6. CONTRACTOR shall add additional chemical restrictions and testing requirements (as

required and where appropriate) when ordering steel.

7. Steels not identified in Table 13-1 through Table 13-10 shall be considered for use by COMPANY only after CONTRACTOR has exhausted all avenues for procuring these steels and CONTRACTOR develops a written technical justification for review and approval by COMPANY. The technical justification shall be a thorough evaluation that the steels proposed meet or exceed the minimum requirements of this specification. The evaluation shall include, but is not limited to, chemistries, mechanical properties, material supplementary requirements, weldability issues, prequalification requirements, design considerations, etc.

8. CONTRACTOR shall submit the technical justification for procuring steels not listed in this specification to COMPANY for review and approval prior to placing the Purchase Order and allowing sufficient time for COMPANY approval.

200-20-ST-SPC-00029_01

Page 52 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Table 13-1 Yield Type I – Toughness Class NT

Material Specification Requirements:

Description

Requirement

Additional Requirements

Yield Strength Range

248–380 MPa (36–55 ksi)

Tensile Strength Range

400–550 MPa (58–80 ksi)

Charpy V-Notch Impact

None

Carbon Equivalent (CE)

0.46

Maximum Thickness

50 mm (2 in.)

Steel Making

Fully killed

Where the standard material specification requires CVN testing, it shall be applied

General

The standard material specification’s (i.e., API ASTM, BS, etc.) CVN test temperature, absorbed energy, and CE requirements shall be satisfied even if the requirements of this specification are more lenient.

Use of EN 10025-2 and EN 10210-1 is limited to secondary and tertiary steel design.

Recommended Material Grades:

Toughness Class

NT

Plate

Pipe

Shapes

ASTM A 36 EN10025-2 S275J2

API 5L Gr B ASTM A 106 Gr B ASTM A 53 Gr B

ASTM A 36 ASTM A 500 Gr B ASTM A 709 36T2 EN10025-2 S275J2 EN10210-1 S275NH/J2H

200-20-ST-SPC-00029_01

Page 53 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Table 13-2 Yield Type I – Toughness Class CV1

Material Specification Requirements:

Description

Requirement

Additional Requirements

Yield Strength Range

248–380 MPa (36–55 ksi)

Tensile Strength Range

400–550 MPa (58–80 ksi)

Charpy V-Notch

27/20 J (20/15 ft-lb) at LAST

Carbon Equivalent (CE)

0.46

Maximum Thickness

65 mm (2.5 in.)

Except A500 = 50 mm (2 in.)

Steel Making

General

Fully killed and fine prior austenite grained ASTM 5 or finer

[A] Measured by the McQuaid-Ehn test as specified in ASTM E 112 or equivalent approved by Company

The standard material specification’s (i.e., API ASTM, BS, etc.) CVN test temperature, absorbed energy, and CE requirements shall be satisfied even if the requirements of this specification are more lenient.

Recommended Material Grades:

Toughness Class

Plate

CV1

ASTM A 36

Pipe

Shapes

API 5L Gr B ASTM A 53 Gr B ASTM A 106 Gr B

ASTM A 36 ASTM A 500 Gr B ASTM A 709 36T2

200-20-ST-SPC-00029_01

Page 54 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Table 13-3 Yield Type I – Toughness Class CV2, CV2Z4 and CV2Z5

Material Specification Requirements:

Description

Requirement

Additional Requirements

Yield Strength Range

248–380 MPa (36–55 ksi)

Tensile Strength Range

400–550 MPa (58–80 ksi)

Charpy V-Notch

[A] 27/20 J (20/15 ft-lb) at 30 C (54 F) below LAST. If approved by Company as per Section 5 of this document, tsting may be conducted at 20 °C (36 °F) below LAST.

Carbon Equivalent (CE)

0.46

Maximum Thickness

50 mm (2 in.)

Steel Making

Fully killed and fine prior austenite grained ASTM 5 or finer

CV2Z4

CV2Z5

Supplemental Requirements SR- 1, SR-4, and SR-5 apply

Supplemental Requirements SR- 5 applies

Formed tubulars, D/t ratio < 20 Supplemental Requirement SR-6

applies

General

The standard material specification’s (i.e., API ASTM, BS, etc.) CVN test temperature, absorbed energy, and CE requirements shall be satisfied even if the requirements of GP 29-01-45 are more lenient.

Except A500 = 32 mm (1.25 in.)

[A] Measured by the McQuaid-Ehn test as specified in ASTM E 112 or equivalent approved by Company

Supplemental Requirements shall be in accordance with Section 14 of this document

Supplemental Requirements shall be in accordance with Section 14 of this document

Supplemental Requirements shall be in accordance with Section 14 of this document

Recommended Material Grades:

Toughness Class

Plate

Pipe

Shapes

CV2

ASTM A 36

API 5L Gr B ASTM A 53 ASTM A 106 Gr B

ASTM A36 ASTM A500 ASTM A709 36T2

200-20-ST-SPC-00029_01

Page 55 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Recommended Material Grades:

Toughness Class

Plate

Pipe

Shapes

CV2Z5

ASTM A36

CV2Z4

ASTM A36

API 5L Gr B ASTM A 53 Gr B ASTM A 106 Gr B

API 5L Gr B ASTM A 53 Gr B

ASTM A36 ASTM A500 ASTM A709 36T2

ASTM A36 ASTM A500 ASTM A709 36T2

200-20-ST-SPC-00029_01

Page 56 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Table 13-4 Yield Type II – Toughness Class NT

Material Specification Requirements:

Description

Requirement

Additional Requirements

Yield Strength Range

345–482 MPa (50–70 ksi)

Tensile Strength Range

482–620 MPa (70–90 ksi)

Charpy V-Notch Impact

None Required

Carbon Equivalent (CE)

0.46

Maximum Thickness

50 mm (2 in.)

Where the standard material specification requires CVN testing, it shall be applied.

Steel Making

General

Fully killed

The standard material specification’s (i.e., API ASTM, BS, etc.) CVN test temperature, absorbed energy requirements, and CE shall be satisfied even if the requirements of this specification are more lenient.

Use of EN 10025-2 and EN 10210-1 is limited to secondary and tertiary steel design.

Recommended Material Grades:

Toughness Class

NT

Plate

Pipe

Shapes

API 2MT1 Gr 50 API 2H Gr 50 ASTM A 709 Gr 50W API SPEC 2W Gr 50 EN 10225-1 S355NLO/MLO EN 10025-2 S355J2

API 5L X52 EN 10225-3 S355NLHHO EN 10225-3 S355QLHHO

ASTM A 131 AH36 ASTM A 572 Gr 50 ASTM A 709 Gr 50W EN 10025-2 S355J2 EN10210-1 S355NH/J2H

200-20-ST-SPC-00029_01

Page 57 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Table 13-5 Yield Type II – Toughness Class CV1

Material Specification Requirements:

Description

Requirement

Additional Requirements

Yield Strength Range

345–482 MPa (50–70 ksi)

Tensile Strength Range

482–620 MPa (70–90 ksi)

Charpy V-Notch Impact

42/35 J (30/25 ft-lb) at LAST.

Carbon Equivalent (CE)

0.46

Maximum Thickness

60 mm (2.375 in.)

Steel Making

Fully killed and fine prior austenite grained ASTM 5 or finer

Formed tubulars, D/t ratio < 20

Supplemental Requirement SR-6 applies

General

For EN 10225-1 steels, Optional Requirement Op-11 applies

The standard material specification’s (i.e., API ASTM, BS, etc.) CVN test temperature, absorbed energy requirements, and CE shall be satisfied even if the requirements of this specification are more lenient.

CVN measured at plate centerline at mid-thickness per API SPEC 2W/API SPEC 2Y, applies to all plate grades only.

[A] Measured by the McQuaid-Ehn test as specified in ASTM E 112 or equivalent approved by Company

Supplemental Requirements shall be in accordance with Section 14 of this document (Applicable only for cold formed tubulars)

Use of EN 10025-2 and EN 10210-1 is limited to secondary and tertiary steel design.

Recommended Material Grades:

Toughness Class

CV1

Plate

Pipe

Shapes

API 2MT1 Gr 50 API 2H Gr 50 ASTM A 709 Gr 50W API 2W Gr 50 EN 10225-1 S355NLO/MLO EN 10025-2 S355J2

API 5L X52 EN 10225-3 S355NLHHO EN 10225-3 S355QLHHO

ASTM A 131 DH36 ASTM A 572 Gr 50 ASTM A 709 Gr 50 EN 10225-2 S355NLO/MLO EN 10025-2 S355J2 EN10210-1 S355NH/J2H

200-20-ST-SPC-00029_01

Page 58 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Table 13-6 Yield Type II – Toughness Class CV2, CV2Z4 and CV2Z5

Material Specification Requirements:

Description

Requirement

Additional Requirements

Yield Strength Range

345–482 MPa (50–70 ksi)

Tensile Strength Range 482–620 MPa (70–90 ksi)

Charpy V-Notch Impact

[A] 42/35 J (30/25 ft-lb) at 30 C (54 F) below LAST. If approved by Company as per Section 5 of this document, testing may be conducted at 20 °C 936 °F) below LAST.

CVN measured at plate centerline at mid-thickness per API SPEC 2W/API SPEC 2Y, applies to all plate grades only.

Carbon Equivalent (CE) 0.43

Pcm

0.23

Maximum Thickness

65 mm (2.5 in.)

Steel Making

Fully killed and fine prior austenite grained ASTM 5 or finer

CV2Z4

CV2Z5

Supplemental Requirements SR-1, SR-4, and SR-5 apply

For EN 10225 Steels, Optional Requirements Op-18, Op-3, and 12 apply

Supplemental Requirement SR-5 applies

For EN 10225 Steels, Optional requirements Op-3 applies

Formed tubulars, D/t ratio < 20

Supplemental Requirement SR-6 applies

General

For EN 10225-1 Steels, Optional requirement Op-11 applies

The standard material specification’s (i.e., API ASTM, BS, etc.) CVN test temperature, absorbed energy requirements, and CE shall be satisfied even if the requirements of this specification are more lenient.

Except BSI BN EN 10225=0.44, ASTM A 709/A 709M = 0.45 ASTM A572/A 572M = 0.45

Except BSI BS EN 10225, ASTM A 709/A 709M, ASTM A 572/A 572M

[A] Measured by the McQuaid- Ehn test as specified in ASTM E 112 or equivalent approved by Company.

Supplemental Requirements shall be in accordance with Section 14 of this document.

Supplemental Requirements shall be in accordance with Section 14 of this document.

Supplemental Requirements shall be in accordance with Section 14 of this document. (Applicable only for cold formed tubulars)

200-20-ST-SPC-00029_01

Page 59 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Recommended Material Grades:

Toughness Class

CV2

CV2Z5

CV2Z4

Notes:

Plate

Pipe

Shapes

API 2MT1 Gr 50 API 2W Gr 50 API 2Y Gr 50 EN 10225-1 S355NLO/MLO

API 2MT1 Gr 50 API 2H Gr 50 API 2W Gr 50 API 2Y Gr 50 EN 10225-1 S355NLO/MLO

API 2MT1 Gr 50 API 2W Gr 50 API 2Y Gr 50 EN 10225-1 S355NLO/MLO

API 5L X52 EN 10225-3 S355NLHHO EN 10225-3 S355QLHHO

API 5L X52 EN 10225-3 S355NLHHO EN 10225-3 S355QLHHO

ASTM A 131 DH/EH36 ASTM A 572 Gr 50 (1) ASTM A 709 Gr 50W BS EN 10225-2 S355NLO/MLO

ASTM A 131 DH/EH36 ASTM A 572 Gr 50 (1) ASTM A 709 Gr 50W BS EN 10225-2 S355NLO/MLO

API 5L X52 EN 10225-3 S355NLHHO EN 10225-3 S355QLHHO

ASTM A 131 DH/EH36 ASTM A 572 Gr 50 (1) ASTM A 709 Gr 50W

(1) Type II ASTM A572 Gr 50 utilizes niobium (Nb) as one of the primary alloying elements for

strengthening. For thicker steel plate and shapes, Nb additions can have negative effects on weld Heat-Affected-Zone (HAZ) toughness. Therefore, vanadium (V)-treated Type I A572 G.50 has been specified for thicker plates and shapes in CV2 and higher classifications.

(2) Equivalence of API 2W supplementary requirements to API 2Y supplementary requirements

is provided in Sec 14.1.

200-20-ST-SPC-00029_01

Page 60 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Table 13-7 Yield Type II – Toughness Class CV2X and CV2ZX

Material Specification Requirements:

Description

Requirement

Additional Requirements

Yield Strength Range

345–482 MPa (50–70 ksi)

Tensile Strength Range

Charpy V-Notch Impact

Prequalification

482–620 MPa (70–90 ksi)

42/35 J (30/25 ft-lb) at 30 C (54 °F) below LAST. If approved by Company as per Section 5 of this document, testing may be conducted at 20 °C (36 °F) below LAST.

API RP 2Z shall apply to all steels For EN10225 grades option 17 shall apply

Carbon Equivalent (CE)

Pcm

0.43

0.23

Maximum Thickness

Steel Making

CV2ZX

CV2X

API SPEC 2Y = 150 mm (6 in.) API SPEC 2W = 100 mm (4 in.) BSI BS EN 10225 = 100 mm (4 in.) ASTM A 131/A 131M = 65 mm (2.5 in.)

Fully killed and fine prior austenite grained ASTM 5 or finer

Supplemental Requirements SR-1 and SR-4, SR-5 and SR-9 apply

For EN 10225 Steels, Optional requirements Op-18, Op-12, Op-3 and Op-17 apply

Supplemental Requirement SR-3, SR-5 and SR-9 apply

For EN 10225 Steels, Optional requirements Op-18, Op-12, Op-3 and Op-17 apply

CVN measured at plate centerline at mid-thickness per API SPEC 2W/API SPEC 2Y, applies to all plate grades only.

Except BSI BS EN 10225=0.44, ASTM A 709/A 709M = 0.45, ASTM A 572/A 572M = 0.45

Except BSI BS EN 10225, ASTM A 709/A 709M, ASTM A 572/A 572M have no Pcm requirements

[A] Measured by the McQuaid- Ehn test as specified in ASTM E 112 or equivalent approved by Company.

Supplemental Requirements shall be in accordance with Section 14 of this document.

Supplemental Requirements shall be in accordance with Section 14 of this document.

200-20-ST-SPC-00029_01

Page 61 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Material Specification Requirements:

Description

Requirement

Additional Requirements

Supplemental Requirements shall be in accordance with Section 14 of this document. . (Applicable only for cold formed tubulars)

Formed tubulars, D/t ratio < 20

Supplemental Requirement SR-6 applies

General

For EN 10225-1 Steels, Optional requirements Op-11 applies

The standard material specification’s (i.e., API ASTM, BS, etc.) CVN test temperature, absorbed energy requirements, and CE shall be satisfied even if the requirements of this specification are more lenient.

Recommended Material Grades:

Toughness Class

CV2X

CV2ZX

Notes:

Plate

Pipe

Shapes

API 2W Gr 50 API 2Y Gr 50 EN 10225-1 S355MLO

API 2W Gr 50 API 2Y Gr 50 EN 10225-1 S355MLO

NA

NA

NA

NA

(1) Equivalence of API 2W supplementary requirements to API 2Y supplementary requirements

is provided in Sec 14.1.

200-20-ST-SPC-00029_01

Page 62 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Table 13-8 Yield Type III – Toughness Class CV1

Material Specification Requirements:

Description

Requirement

Additional Requirements

Yield Strength Range

413–517 MPa (60–75 ksi)

Tensile Strength Range

Charpy V-Notch Impact

517–620 MPa (75–90 ksi)

47/40 J (35/30 ft-lb) at LAST

Carbon Equivalent (CE)

Pcm

0.42

0.22

Maximum Thickness

Steel Making

API SPEC 2Y = 100 mm (4 in.) API SPEC 2W = 100 mm (4 in.) API SPEC 5L X60 = 50 mm (2 in.) BSI BS EN 10225 = 100 mm (4 in.) ASTM A 572/A 572M = 60 mm (2.375 in.) ASTM A 131/A 131M = 60 mm (2.375 in.)

Fully killed and fine prior austenite grained ASTM 5 or finer

Formed tubulars, D/t ratio < 20

Supplemental Requirement SR-6 applies

General

For EN 10225-1 Steels, Optional requirement Op-11 applies

The standard material specification’s (i.e., API ASTM, BS, etc.) CVN test temperature, absorbed energy requirements, and CE shall be satisfied even if the requirements of this specification are more lenient.

CVN measured at plate centerline at mid-thickness per API SPEC 2W/API SPEC 2Y, applies to all plate grades only.

Except S460G1+N = 0.43

[A] Measured by the McQuaid- Ehn test as specified in ASTM E 112 or equivalent approved by Company

Supplemental Requirements shall be in accordance with Section 14 of this document (Applicable only for cold formed tubulars)

200-20-ST-SPC-00029_01

Page 63 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Recommended Material Grades:

Toughness Class

Plate

CV1

Notes:

API 2W Gr 60 API 2Y Gr 60 ASTM A 633 Gr E ASTM A 572 Gr 60 EN 10225-1 S460QLO EN 10225-1 S500QLO

Pipe

Shapes

API 5L X60

ASTM A 131 Gr EH40 ASTM A 572 Gr 60

(1) Equivalence of API 2W supplementary requirements to API 2Y supplementary requirements

is provided in Sec 14.1.

200-20-ST-SPC-00029_01

Page 64 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Table 13-9 Yield Type III – Toughness Class CV2, CV2Z4 and CV2Z5

Material Specification Requirements:

Description

Requirement

Additional Requirements

Yield Strength Range

413–517 MPa (60–75 ksi)

Tensile Strength Range 517–620 MPa (75–90 ksi)

Charpy V-Notch Impact 47/40 J (35/30 ft-lb) at 30 C (54 °F)

below LAST. If approved by Company as per Section 5 of this document, testing may be conducted at 20 °C (36 °F) below LAST.

Carbon Equivalent (CE) 0.42

Pcm

0.22

Maximum Thickness

Steel Making

CV2Z4

CV2Z5

API SPEC 2Y = 100 mm (4 in.) API SPEC 2W = 100 mm (4 in.) API SPEC 5L X60 = 50 mm (2 in.) BSI BS EN 10225 = 100 mm (4 in.) ASTM A 572/A 572M = 60 mm (2.375 in.) ASTM A 131/A 131M = 60 mm (2.375 in.)

Fully killed and fine prior austenite grained ASTM 5 or finer

Supplemental Requirements SR-1, SR-4 and SR-5 apply

For EN 10225 Steels, Optional Requirements Op-18, Op-3, and 12 apply

Supplemental Requirement SR-5 apply

For EN 10225 Steels, Optional requirements Op-3 applies

Formed tubulars, D/t ratio < 20

Supplemental Requirement SR-6 applies

For EN 10225 Steels, Optional requirement Op-11 applies

CVN measured at plate centerline at mid-thickness per API SPEC 2W/API SPEC 2Y, applies to all plate grades only.

[A] Measured by the McQuaid- Ehn test as specified in ASTM E 112 or equivalent approved by Company

Supplemental Requirements shall be in accordance with Section 14 of this document

Supplemental Requirements shall be in accordance with Section 14 of this document

Supplemental Requirements shall be in accordance with Section 14 of this document (Applicable only for cold formed tubulars)

200-20-ST-SPC-00029_01

Page 65 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Material Specification Requirements:

Description

Requirement

Additional Requirements

General

The standard material specification’s (i.e., API ASTM, BS, etc.) CVN test temperature, absorbed energy requirements, and CE shall be satisfied even if the requirements of this specification are more lenient.

Recommended Material Grades:

Toughness Class

CV2

CV2Z5

CV2Z4

Notes:

Plate

Pipe

Shapes

API 2W Gr 60 API 2Y Gr 60 EN 10225-1 S460QLO EN 10225-1 S500QLO

API 2W Gr 60 API 2Y Gr 60 EN 10225-1 S460QLO EN 10225-1 S500QLO

API 2W Gr 60 API 2Y Gr 60 EN 10225-1 S460QLO EN 10225-1 S500QLO

API 5L X60

ASTM A 131 Gr EH40 ASTM 572 Gr 60

API 5L X60

ASTM A 131 Gr EH40 ASTM 572 Gr 60

API 5L X60

ASTM A 131 Gr EH40 ASTM 572 Gr 60

(1) Equivalence of API 2W supplementary requirements to API 2Y supplementary requirements

is provided in Sec 14.1.

200-20-ST-SPC-00029_01

Page 66 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Table 13-10 Yield Type III – Toughness Class CV2X and CV2ZX

Material Specification Requirements:

Description

Requirement

Additional Requirements

Yield Strength Range

413–517 MPa (60–75 ksi)

Tensile Strength Range 517–620 MPa (75–90 ksi)

Charpy V-Notch Impact 47/40 J (35/30 ft-lb) at 30 C below LAST. If approved by Company as per Section 5 of this document, testing may be conducted at 20 °C (36 °F) below LAST.

CVN measured at plate centerline at mid-thickness per API SPEC 2W/API SPEC 2Y, applies to all plate grades only.

Prequalification

API RP 2Z shall apply to API SPEC 2W / 2Y steels For EN10225 grades option 17 shall apply

Carbon Equivalent (CE) 0.42

Pcm

0.22

Maximum Thickness

100 mm (4 in.)

Steel Making

Fully killed and fine prior austenite grained ASTM 5 or finer

CV2ZX

CV2X

Supplemental Requirements SR-1, SR-3, SR-4, SR-5 and SR-9 apply

For EN 10225 Steels, Optional requirements Op-18, Op-12, Op-3 and Op-17 apply

Supplemental Requirement SR-5 apply

For EN 10225 Steels, Optional requirements Op-3 and Op-17 apply

Formed tubulars, D/t ratio < 20

Supplemental Requirement SR-6 applies

For EN 10225 Steels, Optional requirement Op-11 applies

[A] Measured by the McQuaid- Ehn test as specified in ASTM E 112 or equivalent approved by Company.

Supplemental Requirements shall be in accordance with Section 14 of this document.

Supplemental Requirements shall be in accordance with Section 14 of this document.

Supplemental Requirements shall be in accordance with Section 14 of this document. (Applicable only for cold formed tubulars)

200-20-ST-SPC-00029_01

Page 67 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Material Specification Requirements:

Description

Requirement

Additional Requirements

General

The standard material specification’s (i.e., API ASTM, BS, etc.) CVN test temperature, absorbed energy requirements, and CE shall be satisfied even if the requirements of this specification are more lenient.

Recommended Material Grades:

Toughness Class

CV2X

CV2ZX

Notes:

Plate

API 2W Gr 60 API 2Y Gr 60 EN 10225-1 S460QLO EN 10225-1 S500QLO

API 2W Gr 60 API 2Y Gr 60 EN 10225-1 S460QLO EN 10225-1 S500QLO

Pipe

NA

NA

Shapes

NA

NA

(1) Equivalence of API 2W supplementary requirements to API 2Y supplementary requirements

is provided in Sec 14.1.

200-20-ST-SPC-00029_01

Page 68 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

14. SUPPLEMENTARY STEEL REQUIREMENTS

14.1 API STEEL OPTIONAL REQUIREMENTS

The details on supplementary steel requirements is defined below:

• SR-1 for API 2W: (S1 for API 2Y/2H): Ultrasonic Examination according to API SPEC 2W, Ref.[27], API SPEC 2Y, Ref.[28], API SPEC 2H, Ref.[25] shall be applied where designated.

• SR-3 for API 2W: (S3 for API 2Y/2H): Additional tension test shall be applied according to API SPEC 2W, API SPEC 2Y, API SPEC 2H, when Toughness Class CV2X and CV2ZX steels are specified.

• SR-4 for API 2W: (S4 for API 2Y/2H): Through-thickness (Z-direction) testing according to API SPEC 2W or API SPEC 2Y or API SPEC 2H, Supplementary Requirement shall be performed for CV2Z4 and CV2ZX steels.

• SR-5 for API 2W: (S5 for API 2Y/2H): Low sulphur requirements according to API SPEC 2W, API SPEC 2Y, API SPEC 2H shall be applied when Toughness Class CV2Z4, CV2ZX and CV2Z5 steels are specified.

• SR-6 for API 2W: (S8 for API 2Y/2H): Strain aging tests if forming into tubulars results in greater that 5% strain (D/t < 20) shall be performed according to API SPEC 2W, API SPEC 2Y, API SPEC 2H.

• SR-9 for API 2W: (S11 for API 2Y/2H): Preproduction Qualification (CTOD) weldability testing in accordance with API RP 2Z, Ref.[23] shall be performed for all Toughness Class CV2X and CV2ZX steels. Full Charpy curve shall be furnish from the thickest plate produced from the first three heats.

14.2 EN STEEL OPTIONAL REQUIREMENTS

The details on optional steel requirements are defined here below:

• Op-3 The content of Sulphur is reduced: S ≤ 0,007 % [mass fraction].

• Op-11 Strain ageing testing shall be carried out

• Op-12 Through-thickness testing shall be carried out in the delivery condition.

• Op-17 Weldability testing and mechanical testing of butt welds

• Op-18 Plates/Pipes/Shapes shall be ultrasonic tested and meet the requirements

according to EN 10160 and additionally as indicated below:

• Flat products shall be inspected by ultrasonic testing in accordance with EN

10160, quality class E2 for body and edges.

• Scanning area shall comprise of 100 mm square grids parallel or perpendicular to the edges of the flat product. Full examination of a 50 mm zone shall be performed over the four edges of the flat product.

200-20-ST-SPC-00029_01

Page 69 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

15. ALTERNATIVE STEEL GRADES

Steels not identified in Section 12 shall be considered for use by COMPANY only after exhausted all avenues for procuring these steels and a written technical justification must develops for review and approval by COMPANY.

The technical justification shall be a thorough evaluation that steels proposed meet or exceed the minimum requirements of this specification. The evaluation shall include, but is not limited to chemistries, mechanical properties, material supplementary requirements, weldability issues, prequalification requirements, design considerations, etc.

The technical justification for procuring steels not listed in this document shall submit to COMPANY for review and approval prior to placing the Purchase Order and allowing sufficient time for COMPANY approval.

16. REPAIRS AND REPLACEMENT

SUB-CONTRACTOR/VENDOR shall be responsible for the cost of damage, repairs, replacement of materials, protection of the structure, unproductive labour or equipment, or any other cost for work performed by vendor on steels that do not meet the provision of this document.

All material which are corroded due to improper storage, protection and/or maintenance shall be replaced by SUB-CONTRACTOR/VENDOR at no cost to COMPANY.

Repair by welding is not permitted in plates or seamless tubular. Repair to rolled section and fabricated beams/tubular shall only permitted after approval by COMPANY and according to SUB-CONTRACTOR/VENDOR repair procedures which have been approved by COMPANY.

17. FABRICATION, WELDING AND TESTING

Fabrication, welding and testing for bend/rolled tubular and plates, hot forming plates, etc. shall be as per project specification below:

• Specification for Offshore Fabrication of Steel Structures, Welding & Inspection, Ref.[9]

• Specification for Hot Dip Galvanizing of Structural Steelwork, Ref.[8]

18. OTHER MATERIAL

18.1 Grout Material

All grout material shall conform to either Class B or sulphate resistant Class G of API SPEC 10A, Ref.[30] and with test results and data sheets provided to COMPANY for review and approval at least 3 months prior to use offshore, unless otherwise specified in project-specific design documents.

200-20-ST-SPC-00029_01

Page 70 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Any alternative similar materials with appropriate mix proportions and non-shrink/sulphate resistance properties may propose to COMPANY for review and approval.

The composition of grout material, density and strength requirements should be specified on the drawings.

Adequate laboratory test shall be performed to confirm that the final selected grout mix is compatible with the selected installation methodology and required strength considered for the design.

All testing and test procedures shall be in accordance with ASTM C 109/C 109M, Ref.[56]. All test cubes shall meet the strengths in Table 17-1 below. If any test fall below the required strengths, grouting shall cease until the cause of the shortfall is identified and remedied.

Table 18-1 Characteristic Cube Strength

Age at Test

Characteristic Cube Strength, MPa

30 hours

3 days

28 days

15.0

36.0

50.0

18.2 Timber Material

The minimum timber design values shall be determined in accordance with ASTM D 245, Ref. [58] , ASTM D 143, Ref.[57] and ASTM D 2555, Ref.[59] or in accordance with the latest edition of Design Values for Wood Construction, a supplement to National Design Specification for Wood Construction by the American Forest and Paper Association, Ref.[72].

Alternatively, timber strength class can be selected accordingly to EN 338, Ref. [76].

The maximum moisture content shall be 19%.

The glue for laminated timber shall be exterior use adhesive.

The minimum timber compressive strength should be 2.7 times the compressive stress computed from the loadout or launch analysis. The minimum timber compressive strength shall be determined using the applicable ASTM standards.

18.3 Swing Rope

Swing rope shall be three-strand No. 1 twisted polypropylene polyester blend rope attached to 10 mm stainless steel wire rope. All fittings shall be 316 stainless steel.

18.4 Fiberglass

18.4.1 Fiberglass Grating

Fiberglass grating shall have a durable non-skid surface and be formulated for UV resistance.

200-20-ST-SPC-00029_01

Page 71 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

USCG certification is required for fiberglass grating to be used in areas requiring a L1, L2 or L3 fire integrity rating.

In areas where no fire rating is required, the fiberglass grating shall have an ASTM E 84, Ref.[62] tunnel test flame spread rating of 25 or less.

18.4.2 Other Fiberglass Component

COMPANY shall approve use of fiberglass, location of use, fiberglass type, manufacturer and design prior to award of Contract. Use shall be limited to grating, helideck aprons, handrails, ladders, ladder cage and stair treads.

Fiberglass shall not be used for caged ladders in the wave zone.

18.5 Bolts and Nuts

Bolt and nut threads shall conform to ASME B1.1, Ref. [31] ,Unified National Coarse (UNC).

All nuts, bolts and washers shall be coated in compliance with project coating specification, Ref. [19].

ASTM standards for Imperial size are listed in this section, however the corresponding ASTM codes for SI system are also applicable.

18.5.1 Heavy Hex Type Carbon Steel Bolts (Above 0.5in, along with metric

threads standard)

Unless otherwise noted on the Project Drawings, all structural carbon steel bolts with nominal diameter equal or above 0.5in (12.7mm) shall be heavy hex type conforming to ASTM F3125, which covers both grades A325 and A490.

Where A325 grade have been called, all nuts shall be heavy hex head type conforming to ASTM A 563 Grade C, Ref. [49].

Where A490 grade have been called all nuts shall be heavy hex head type conforming to ASTM A 563 Grade DH, Ref. [49].

Washers shall conform to ASTM F 436, Ref. [65]. The diameter of the washer holes shall be 2 mm greater than the bolt size for bolts 25 mm and smaller, and 3 mm greater than the bolt size for bolts larger than 25 mm.

All bolts shall have a maximum hardness as per applicable standards.

Heavy hex type steel bolts shall be provided with either a split lock washer and either 1 or 2 nuts or a washer and lock nut. Split lock washers shall conform to ANSI B18.21.1 or DIN 127.

18.5.2 Hex Type Carbon Steel Bolts (Below 0.5in)

All carbon steel bolts with nominal diameter less than 0.5in (12.7mm) shall be hex type conforming to ASTM A 307. All nuts shall be hex head type conforming to ASTM A 563, Ref. [49]. Washers shall conform to ASTM F844.

200-20-ST-SPC-00029_01

Page 72 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

18.5.3 Stud bolts

Unless otherwise noted on the Project Drawings, all stud bolts shall conform to ASTM A 193 B7 and all nuts shall be heavy hex head type conforming to ASTM A 194 2H.

18.6 Solid Bars

Unless otherwise noted on the Project Drawings, all solid bars shall conform to American Iron and Steel Institute, AISI 4140 and AISI 4130, forged, normalized, quench and tempered in accordance with ASTM A 304, Ref.[43]

The prior austenite grain size shall be ASTM grain size 6 or finer per McQuaid-Ehn test as per ASTM E 112, Ref.[63]

Specified minimum yield and ultimate tensile strength shall be as required on the Purchase Order.

All solid bars shall have a minimum elongation of 18% and a maximum hardness of 260 HB.

All solid bars shall also have CVN testing performed with 68 J average / 52 J single lowest value at -40 °C. Testing shall be performed at mid-thickness and surface locations.

18.6.1 NDE Testing

NDE testing by both MT and UT shall be performed on the solid bars and conform to the requirements of this section.

Fluorescent magnetic particle testing of machined bar shall be according to ASTM A 275/A 275M, Ref.[42] (total surface area with no visible defects).

Ultrasonic testing shall be in accordance with ASTM A 388/A 388M, Ref.[45] and ASTM A 729/A 729M, Ref.[54].

18.6.2 Frequency of Testing

Frequency of testing shall be as follows:

• Chemical compositions – Product analysis per heat

• Grain size – Each bar (prolongation)

• Tensile Test – Each bar (prolongation)

• Hardness Test – Each bar (10 surface locations on prolongation)

• Charpy Impact Test – Each bar (on prolongation)

• NDE – Each bar

18.7 Handrails

All pipe for handrails, posts and sockets shall conform to ASTM A 53/A 53M, Ref.[36] Type S, Grade B, API SPEC 5L, Ref.[29] Grade B, and ASTM A 106, Ref.[37] Grade B.

All pipe shall be galvanized with a minimum 610 gm/m2 of galvanizing in accordance with ASTM A 123/A 123M, Ref.[38].

200-20-ST-SPC-00029_01

Page 73 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

18.8 Steel Grating and Stair Treads

Steel grating and stair treads shall be serrated, rectangular bar welded steel with minimum 5 mm thick bearing bars 30 mm on center.

Minimum grating depth shall be 32 mm, except on existing platforms where there may be a requirement for matching existing grating depth.

Bearing bar sizes shall be as shown on the Project Drawings. If no size is given on the Project Drawings, then grating shall have a minimum capacity of 488 kg/m3, with a deflection of not more than the span divided by 240, for the span shown on the Project Drawings.

Steel grating and stair treads shall be hot-dip galvanized with a minimum 640 mL/m2 of galvanising in accordance with ASTM A 123/A 123M, Ref.[38], with an additional protective painted coating. Both HDG coating & paint coatings shall be in accordance with “Painting Specification” 200-20-CE-SPC-00001.

Locating stud welded pins and clamps shall be either fully galvanized or be stainless steel.

All exposed edges of steel grating shall be banded.

Pre-fabricated steel stair treads may be substituted for treads fabricated of grating with prior written approval by COMPANY.

All stair treads shall have abrasive nosing, grip strut or an equivalent approved by COMPANY.

18.9 Rubber Goods

Shock cells, barge bumper posts, jacket leg closure diaphragms, grout packer and other rubber goods shall be of the type shown on the Project Drawings.

Substitutions proposed shall only be made if approved in writing by COMPANY.

Rubber goods shall be manufactured from natural rubber compounds with properties suited for a marine environment and for the specific service intended. Other materials shall not be used without prior written COMPANY approval.

Suppliers of rubber goods shall furnish test data to prove the ability of their products to perform the intended service over a normal service life.

Material data sheets shall state the expected service life of the products and also that they comply with project requirements.

18.10 Rub Strips for Boat Landings and Barge Bumpers

The rub strips on vertical members of boat landings shall provide as indicated on the Project Drawings or Purchase Order.

All manufacturing and product data sheets together with installation and repair procedures for the proposed products shall provide to COMPANY for review and approval.

Rub strips shall consist of natural rubber material bonded to an integral steel stiffening/backup plate, and shall have a minimum effective width of 150 mm and a minimum height of 65 mm.

The integral steel plate shall be at least 6 mm thick, and, where compatible with the rub strip design, be covered by natural rubber a minimum of 5 mm thick.

200-20-ST-SPC-00029_01

Page 74 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

Rub strips shall be of an energy-absorbing hollow-core type for rigid mounted boat landings, and shall be of a rectangular profile solid-core type for shock-cell mounted boat landings.

Use of slide-in type rub strips is not acceptable.

18.11 Chain Link Fencing

Chain link fence fabric shall conform to ASTM A 392, Ref.[46] and shall have knuckled selvage on top and bottom. Fence wire shall be minimum 9 gauge (0.148in –3.76mm).

Mesh size shall be limited to 2in (50.8mm).

Fencing and hardware shall be Class 2 heavy duty galvanized with a minimum 2 Oz/ft2 (610 g/m2) galvanizing in accordance with ASTM A 392, Ref. [46]. Security single link chains shall be supplied in stainless steel.

18.12 Shipping Requirements for Miscellaneous Materials

All miscellaneous materials shall prepare for export shipment, and shall be created in a manner to provide maximum protection for shipment and storage.

The following additional items shall provide for each item they furnish:

• Full fabrication drawings, including description of all materials and coatings

• Detailed instructions for offshore installation

• Total weight of each assembly

All equipment and component parts shall be warranted against defective materials, design and workmanship for 1 year after being placed in service, not to exceed 36 months after date of shipment.

200-20-ST-SPC-00029_01

Page 75 of 79

Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

19. APPENDICES

No.

Description

Appendix-1

Comparison of API vs EN specifications

Appendix-2

Comparison of properties for ASTM / API vs ISO grades

Appendix-3

Comparison of API vs EN steel optional supplementary requirements equivalency

200-20-ST-SPC-00029_01

Page 76 of 79

19.1 Appendix-1 : Comparison of API vs EN specifications

Appendix-1 : Comparison of API vs EN specifications

Title of Change

9. Materials: 9.1.1 General / 9.1.2 API RP2Z Pre- Qualification

Reference Page No. EPC Doc. No. 200-20-ST-SPC-00029

SPECIFICATION FOR STRUCTURAL MATERIAL FOR COMP3 PROJECT

31

Notes updated

December 2nd 2024 Meeting - Updated Saipem Actions list

API SPECIFICATION 2W

EN 10225 SPECIFICATION

OPEN. Contractor will provide a comparison between API RP 2Z pre- qualification requirements and ANNEX B of EN10225 pre -qualifications requirements, to demonstrate the full equivalence of both the pre- qualification processes.

Annex C.9: SR 9—Preproduction Qualification SR 9.1 to SR 9.4 apply to the preproduction qualification. SR 9.1: This supplementary requirement provides for preproduction qualification by special welding and mechanical testing SR 9.2: Qualification for HAZ Toughness and Delayed Cracking Test sections of API 2Z SR 9.3: Crack tip opening displacement (CTOD) testing of weld-heat-affected zone SR 9.4: Delayed Cracking Test

Annex B & Section 7.4.3: Weldability testing and mechanical testing of butt weld which inculdes; A series of butt welds with heat inputs in accordance with B.3.5 shall be made. The welds shall comply with the mechanical properties specified in B.4.1. B.2 Welding processes and procedure B.3 Butt-weld requirements B.4 Mechanical testing

9.1.6 Through-Thickness (Z-direction) Test for CV2X and CV2ZX

34

EN references added

OPEN. Contractor will provide a comparison between API through thickness supplementary requirements and EN option 12 for through thickness testing

14. Supplementary Steel Requirements:

59

EN Steel Optional requirements details added

OPEN. Contractor will provide a comparison between API supplementary requirements and equivalent EN options to let COMPANY decide.

12.2(cid:9)Ultrasonic Inspections of Through- Thickness Plate

50

Section 12.2 The acceptance criteria should be same or higher

OPEN Saipem to verify full equivalence beetween ASTM A578 Level C and EN 10160 S1/S2

Annex C.4: SR 4.1: This supplementary requirement covers the procedure and acceptance standards for the determination of reduction-of-area using a tension test specimen whose axis is normal to the surfaces of steel plates with nominal thicknesses 3/4 in. (19 mm) and greater. Definitions shall be in accordance with ASTM A370. SR 4.2 (Number of Test Specimens): Two tests shall be taken from each plate as-rolled (parent plate). SR 4.3 (Orientation of Test Specimens), SR 4.4 (Location of Test Specimens) & SR 4.5 (Preparation of Test Specimens) SR 4.6 (Testing): Tensile testing shall be conducted in accordance with the requirements of ASTM A370. SR 4.7 (Acceptance Standards): Standards for the acceptance of through-thickness testing shall be as per note (a) & (b)

Annex C.5: SR 5.2 (Chemistry): The steels shall conform to the requirements for chemical composition prescribed in Table 1, except that the maximum content of sulfur on heat analysis shall be 0.006 %. Annex C.6: SR 6:Charpy V-notch impact test coupons representing the thickest and thinnest plate of each heat shall be uniformly strained 5 %, or more if specified, in axial tension and aged at 480 °F (250 °C) for one hour at temperature prior to cutting the test specimens. The test results shall meet the requirements of Section 7. Annex C.4: SR 4: SR 4.2 (Number of Test Specimens): Two tests shall be taken from each plate as-rolled (parent plate), SR 4.7 (Acceptance Standards): Standards for the acceptance of through-thickness testing shall be as per note (a) & (b) Annex 4.4: The SR 9 supplement in Annex C shall require testing in accordance with the plate preproduction qualification requirements of API 2Z. Annex C.1: SR 1.1: Pulse echo ultrasonic examination shall be performed on each plate in accordance with ASTM A578/A578M–Level A shall be used. SR 1.3: Optionally, and with prior consultation and agreement, Level C inspection may be used.

ASTM SA 578 Plain and clad steel plates of 10mm and above SA 578 S1 specifies 100% scanning. Acceptance criteria may be Level A, B or C depending on the requirements. For Level C acceptance criteria, an area of approximately 25mm diameter circle or less is acceptable. For Level A & B, an area of approximately 75mm diameter circle or less is acceptable.

Section 7.3.4: Through-thickness testing shall not be carried out, except when Option 12 is specified. Option 12 Through-thickness testing shall be carried out in the delivery condition. Testing is not required for thicknesses below 15 mm (see 7.3.4). Testing shall be in accordance with EN 10164, to meet the following: d) EN 10164 Quality Class Z 35; e) through-thickness tensile strength shall be not less than 80 % of the specified minimum tensile strength.

Section 12: Option 3 The content of sulphur is reduced: S ≤ 0,007 % [mass fraction] Section 12: Option 11 Strain ageing testing shall be carried out for plates over 12,5 mm thickness Section 12: Option 12 Through-thickness testing shall be carried out in the delivery condition. Testing is not required for thicknesses below 15 mm Section 12: Option 17 At the time of the enquiry for all products exceeding 40 mm in thickness the manufacturer shall have available data on the weldability of the material Section 12: Option 18 Plates shall be ultrasonic tested and meet the requirements according to EN 10160, class S1/E2

BS EN 10160 Nominal thickness range 6mm to 200mm EN 10160 quality class S2 & E2 specifies 100mm square grids scanning S1/S2 quality class does not specify any area for single indication; if the indication exceeds 11mm/8mm reference curve, it is unacceptable.

200-20-ST-SPC-00029_01

Page 77 of 79

19.2 Appendix-2 : Comparison of properties for ASTM / API vs ISO grades

Appendix-2 : Comparison of properties for ASTM / API vs ISO grades

Recommended Material Grades for PLATES

As per ITT (COMP-3)

Proposed by Saipem

Recommended Material Grades for PIPES

As per ITT (COMP-3)

Recommended Material Grades for SHAPES

As per ITT (COMP-3)

Proposed by Saipem

YIELD TYPE I - Toughness Class NT

YIELD TYPE I - Toughness Class NT

YIELD TYPE I - Toughness Class NT

Yield Strength

ASTM A36 (2019)

250 MPa (36 ksi)

BS EN 10025-2 (2019) S275J2

API 5L Gr B

ASTM A 106 Gr B

ASTM A 53 Gr B

255-275 Mpa (37-40 ksi) (Table 7)

Yield Strength

248-380 MPa (36-55 ksi)

248-380 MPa (36-55 ksi)

248-380 MPa (36-55 ksi)

Yield Strength

ASTM A36 (2019)

250 MPa (36 ksi)

BS EN 10025-2 (2019) S275J2

BS EN 10210-1 (2006) S275NH/J2H

255-275 Mpa (37-40 ksi) (Table 7)

255-275 MPa (37-40 ksi) (Table B.3)

Tensile Strength

400-550 MPa (58-80 ksi)

410-580 Mpa (59-84 ksi) (Table 7)

Tensile Strength

400-550 MPa (58-80 ksi)

400-550 MPa (58-80 ksi)

400-550 MPa (58-80 ksi)

Tensile Strength

400-550 MPa (58-80 ksi)

410-580 Mpa (59-84 ksi) (Table 7)

Carbon Equivalent (CE)

0.46

0.42 (Table 5)

Carbon Equivalent (CE)

0.46

0.46

0.46

Carbon Equivalent (CE)

0.46

0.42 (Table 5)

370-510 MPa (54-74 ksi) (Table B.3) / 410-580 MPa (59-84 ksi) (Table A.3)

0.40 (Table B.2) / 0.45 (Table A.2)

YIELD TYPE II - Toughness Class NT

YIELD TYPE II - Toughness Class NT

YIELD TYPE II - Toughness Class NT

Recommended Material Grades for PLATES

As per ITT (COMP-3)

Proposed by Saipem

Recommended Material Grades for PIPES

As per ITT (COMP-3)

Proposed by Saipem

Recommended Material Grades for SHAPES

Yield Strength

Tensile Strength

API 2MT1 GR50 API 2H GR50

EN10225-1 S355NLO/MLO

EN10025-2 S355J2

345-482 MPa (50-70 ksi)

335-355 Mpa (49-51 ksi) (Table 8)

335-355 Mpa (49-51 ksi) (Table 6)

Yield Strength

482-620 MPa (70-90 ksi)

470-630 Mpa (70-91 ksi) (Table 8)

470-680 Mpa (70-99 ksi) (Table 6)

Tensile Strength

API 5L X52

345-482 Mpa (50-70 ksi)

482-620 Mpa (70-90 ksi)

EN10225-3 S355NLHHO

EN10225-3 S355QLHHO

335-355 Mpa (49-51 ksi) (Table 5)

440-620 Mpa (64-90 ksi) (Table 5)

335-355 Mpa (49-51 ksi) (Table 8)

440-620 Mpa (64-90 ksi) (Table 8)

Yield Strength

Tensile Strength

As per ITT (COMP-3)

Proposed by Saipem

ASTM A131 AH36 ASTM A572 GR50 ASTM A709 GR 50W

345-482 Mpa (50-70 ksi)

482-620 Mpa (70-90 ksi)

EN10025-2 S355J2

335-355 Mpa (49-51 ksi) (Table 6)

470-680 Mpa (70-99 ksi) (Table 6)

EN10210-1 S355NH/J2H

255-275 MPa (37-40 ksi) (Table B.3)

370-510 MPa (54-74 ksi) (Table B.3) / 410-580 MPa (59-84 ksi) (Table A.3)

Carbon Equivalent (CE)

0.46

0.43 / 0.39 (Table 7)

0.47 (Table 5)

Carbon Equivalent (CE)

0.46

0.45 (Table 4)

0.45 (Table 7)

Carbon Equivalent (CE)

0.46

0.47 (Table 5)

0.40 (Table B.2) / 0.45 (Table A.2)

200-20-ST-SPC-00029_01

Page 78 of 79

19.3 Appendix-3 : Comparison of API vs EN steel optional supplementary requirements equivalency

Appendix-3: Comparison of API vs EN steel optional supplementary requirements equivalency

TEST TYPE

STEEL OPTIONAL SUPPLEMENTARY REQUIREMENTS

(API SPEC 2W)

(API SPEC 2Y / 2H)

EN 10225-1 SPEC

Ultrasonic Test

Additional Tension Test

Through-Thickness Test (Z-direction)

Low Sulphur requirement

Strain-Aged Charpy V-Notch Impact Test

Pre-production Qualification (CTOD) Weldability Test

SR-1

SR-3

SR-4

SR-5

SR-6

SR-9

S1

S3

S4

S5

S8

S11

OP-18

—

OP-12

OP-3

OP-11

OP-17

200-20-ST-SPC-00029_01

Page 79 of 79

Project: Q-32705 - Saipem COMP3 Folder: RFQ Files