200-20-PI-SPC-00017

NFPS Offshore Compression Complexes Project COMP2

COMPANY Contract No.: LTC/C/NFP/5128/20

CONTRACTOR Project No.: 033734

Document Title

SPECIFICATION FOR FLANGES AND HUBS FOR CP6S AND CP7S COMPLEXES

COMPANY Document No.

: 200-20-PI-SPC-00017

Saipem Document No.

: 033734-A-D-00-SPM-TB-S-10005

Discipline

: PIPING

Document Type

: SPECIFICATION

Document Category/Class

: 1

Document Classification

: Internal

16-Mar-2023

06-Feb-2023

Issued for Approval

Rifai

Khairul Harun

Suhaili / Matteo

Issued for Review

Safrul Heizaq

Khairul Harun

Suhaili / Matteo

REV.

DATE

DESCRIPTION OF REVISION

PREPARED BY

CHECKED BY

APPROVED BY

Saipem S.p.A.

Company No._Rev. 200-20-PI-SPC-00017_B

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Rifai Bin SayutiDigitally signed by Rifai Bin Sayuti Date: 2023.03.16 17:14:07 +07’00’Digitally signed byKhai HarunDate: 2023.03.1618:23:49 +08’00’KhaiHarunDigitally signed by Suhaili YunusDN: cn=Suhaili Yunus, ou=Users,email=Suhaili.Yunus@Worley.comDate: 2023.03.16 18:47:31 +08’00’SuhailiYunusMAGNANI MATTEODigitally signed by MAGNANI MATTEO DN: cn=MAGNANI MATTEO, o=SAIPEM, ou=LAPI, email=matteo.magnani@saipem.com, c=US Date: 2023.03.17 09:40:02 +08’00’

NFPS Offshore Compression Complexes Project COMP2 SPECIFICATION FOR FLANGES AND HUBS FOR CP6S AND CP7S COMPLEXES

REVISION HISTORY

Revision

Date of Revision

Revision Description

27-Jan-2023

Issued for Inter-Discipline Check

06-Feb-2023

16-Mar-2023

Issued for Review

Issued for Approval

HOLDS LIST

Hold No

Hold Description

Company No._Rev. 200-20-PI-SPC-00017_B

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NFPS Offshore Compression Complexes Project COMP2 SPECIFICATION FOR FLANGES AND HUBS FOR CP6S AND CP7S COMPLEXES

TABLE OF CONTENTS

INTRODUCTION … 4

1.1 PROJECT OBJECTIVE … 4 1.2 PROJECT SCOPE … 4

DEFINITIONS AND ABBREVIATIONS … 6

2.1 DEFINITIONS … 6 2.2 ABBREVIATIONS … 8

REFERENCE, RULES, CODES AND STANDARDS … 10

3.1 COMPANY DOCUMENTS … 10 3.2 PROJECT DOCUMENTS … 11 3.3 CONTRACTOR DOCUMENTS … 11 INTERNATIONAL CODES AND STANDARDS … 11 3.4

PURPOSE OF DOCUMENT … 15

4.1 GENERAL … 15

GENERAL REQUIREMENT … 15

5.1 FLANGES … 15 5.2 LINE BLANKS… 17

MATERIAL REQUIREMENT … 17

6.1 METHOD OF MANUFACTURE … 17 6.2 CHEMICAL COMPOSITION … 18 6.3 HEAT TREATMENT … 18 6.4 SURFACE FINISH… 18 6.5 SOUR SERVICE SPECIFIC REQUIREMENTS … 18

WELDING … 19

TESTING AND INSPECTION … 20

8.10 HYDROSTATIC TESTING … 20 8.11 CORROSION TESTING … 21 8.12 TENSILE TESTING … 21 8.13 HARDNESS TESTING … 21 8.14 IMPACT TESTING … 21 8.15 METALLOGRAPHIC EXAMINATION FOR LTCS … 21 8.16 HYDROGEN-INDUCED CRACKING (HIC) TESTING FOR CARBON STEEL AND LOW ALLOY STEEL … 22 8.17 INSPECTION … 22

NON-DESTRUCTIVE EXAMINATION (NDE) … 23

9.1 VISUAL EXAMINATION … 23 9.2 MAGNETIC PARTICLE EXAMINATION … 23 9.3 LIQUID PENETRANT EXAMINATION … 23 9.4 ULTRASONIC EXAMINATION … 23

POSITIVE MATERIAL IDENTIFICATION … 23

MARKING AND TRACEABILITY … 24

CERTIFICATION … 24

HANDLING, PACKING, PRESERVATION AND STORAGE … 24

DOCUMENTATION … 25

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NFPS Offshore Compression Complexes Project COMP2 SPECIFICATION FOR FLANGES AND HUBS FOR CP6S AND CP7S COMPLEXES

INTRODUCTION

The North Field is the world’s largest natural gas field and accounts for nearly all of the state of Qatar’s gas production. The reservoir pressure in the North Field has been declining due to continuous production since the early 1990s. The principal objective of the NFPS Project is to sustain the plateau from existing QG South Operation (RL Dry Gas, RGE Wet gas) and existing QG North Operation (QG1 & QG2) production areas by implementing an integrated and optimum investment program consisting of subsurface development, pressure drop reduction steps and compression. Refer to the figure below for a schematic of the North Field.

Qatargas Operating Company Limited is leading the development of the North Field Production Sustainability (NFPS) Project.

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 Qatargas North Field Production Plateau by installing new Compression Complex facilities CP6S & CP7S in QG south 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, 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.

Offshore

CP6S and CP7S Compression Complexes that are part of QG-S RGE facilities as follows:

• CP6S Compression Complex

• Compression Platform CP6S, Living Quarters LQ6S, Flare FL6S

• Bridges BR6S-2, BR6S-3, BR6S-4, BR6S-5

• Bridge linked Tie-in to RP6S

Production from existing wellheads (WHP6S & WHP10S) and new wellhead (WHP14S) are routed via riser platform RP6S to compression platform CP6S to boost pressure and export to onshore via two export lines through the existing WHP6S pipeline and a new 38” carbon steel looping trunkline from RP6S (installed by EPCOL). CP6S is bridge-linked to RP6S.

• CP7S Compression Complex

• Compression Platform CP7S, Living Quarters LQ7S, Flare FL7S

• Bridges BR7S-2, BR7S-3, BR7S-4, BR7S-5

• Bridge linked Tie-in to RP7S

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NFPS Offshore Compression Complexes Project COMP2 SPECIFICATION FOR FLANGES AND HUBS FOR CP6S AND CP7S COMPLEXES

CP7S shall receive production from existing wellheads (WHP5S & WHP7S) and new wellhead (WHP13S). There is only one export line for CP7S through the existing export pipeline from WHP7S. CP7S is bridge-linked to RP7S.

RGA Complex Destressing

Migration of the Electrical power source, Telecoms, Instrumentation and Control systems from WHPs and RPs hosted by RGA to the respective Compression Complexes listed below:

• WHP6S, WHP10S, WHP14S, RP6S and RP10S to CP6S Compression Complex

• WHP5S, WHP7S, WHP13S and RP7S to CP7S Compression Complex

Destressing of Telecoms, Instrumentation and Control system in RGA Complex Control Room, which would include decommissioning and removal of telecom system devices and equipment that would no longer be required post migration and destressing activity.

Onshore

An Onshore Collaborative Center (OCC) will be built under EPC-9, which will enable onshore based engineering teams to conduct full engineering surveillance of all the offshore facilities. The OCC Building will be located in Ras Laffan Industrial City (RLIC) within the Qatar Gas South Plot. MICC & Telecommunication, ELICS related scope will be performed in the OCC building.

Figure 1.2.1: NFPS Compression Project COMP2 Scope

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NFPS Offshore Compression Complexes Project COMP2 SPECIFICATION FOR FLANGES AND HUBS FOR CP6S AND CP7S COMPLEXES

2 DEFINITIONS AND ABBREVIATIONS

2.1 Definitions

Definition

Description

COMPANY

Qatargas Operating Company Limited.

CONTRACTOR

Saipem S.p.A.

DELIVERABLES

FACILITIES

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, tested and permanently installed by CONTRACTOR at SITE in connection with the NFPS Project as further described in Exhibit 6.

fabricated,

MILESTONE

A reference event splitting a PROJECT activity for progress measurement purpose.

PROJECT

NFPS Offshore Compression Complexes Project COMP2

SITE

(i) any area where Engineering, Procurement, Fabrication of the FACILITIES related to the CP6S and CP7S Compression Complexes are being carried out and (ii) the area offshore required for installation of the FACILITIES in the State of Qatar.

SUBCONTRACT

Contract signed by SUBCONTRACTOR and CONTRACTOR for the performance of a certain portion of the WORK within the Project.

SUBCONTRACTOR

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

Scope of Work defined in the CONTRACT.

WORK PACKAGE

The lowest manageable and convenient level in each WBS subdivision.

VENDOR

The person, group, or organization responsible for the design, manufacture, testing, and load-out/shipping of the Equipment/ Material.

SHALL

The word “Shall” is to be understood as a mandatory requirement.

SHOULD

The word “Should” is to be understood as a strongly recommended.

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Definition

Description

MAY

The word “may” is to be understood as an action to be undertaken at CONTRACTOR/COMPANY’s direction and upon evaluation of a review of the Circumstances of the issue in the question.

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2.2 Abbreviations

Code

Definition

ASME

ASTM

CLR

CMTR

CRA

CSR

CTR

Cu-Ni

American Society of Mechanical Engineers

American Society for Testing and Materials

Carbon Equivalent

Crack Length Ratio

Certified Material Test Report

Chromium

Corrosion-Resistant Alloy

Carbon Steel

Crack Sensitive Ratio

Crack Thickness Ration

Copper Nickel

Nominal Diameter

EEMUA

Engineering Equipment and Materials Users Association

FRP

GRE

HIC

ISO

ISPM

LTCS

NACE

NDE

NFPA

NFPS

NPS

PMI

Flat Faced

Fiberglass-Reinforced Plastic

Fiberglass-Reinforced Epoxy

Hydrogen-Induced Cracking

Inside diameter

International Organization for Standardization

International Standard for phytosanitary measure

Liquid Penetrant

Low Temperature Carbon Steel

Magnetic Particle Testing

National Association of Corrosion Engineers

Non-destructive Examination

National Fire Protection Association

North Field Production Sustainability

Nominal Pipe Size

Pipeline

Positive Material Identification

Qatargas Company Limited

Raised face

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Code

Definition

RGE

RTJ

RasGas Wet Gas Asset

Radiographic examination

Ring Type Joint

Stainless Steel

Ultrasonic Testing

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3 REFERENCE, RULES, CODES AND STANDARDS

The following codes, standards and specification are referenced within the document shall be considered as part of this specification. 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.

3.1 Company Documents

S. No

Document Number

Title

Not applicable

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3.2 Project Documents

S. No

Document Number

Title

200-20-CE-SPC-00014

200-20-CE-SPC-00018

200-20-PI-SPC-00017

200-20-PI-SPC-00019

200-20-CE-SPC-00019

ONS-OTS-MNT-003

Material Corrosion Requirement In Sour Service System For CP6S And CP7S Complexes

CRA Weld Overlay Specification for CP6S and CP7S Complexes

for Piping Materials

Specification Documentation Requirements (FEED)

for Material Traceability and

Specification for Positive Materials Identification (PMI) (FEED)

Piping Welding and NDE Specification for CP6S and CP7S Complexes

Spare Parts and Material Identification, Procurement, Delivery, Receipt and Payment- OTS-OED Supported Projects – Procedure (FEED)

3.3 Contractor Documents

S. No

Document Number

Title

Not Applicable

3.4

International Codes and Standards

3.4.1 API–American Petroleum Institute

S. No

Document Number

Title

API SPEC 6A

Specification for Wellhead and Christmas Tree Equipment (21st Edition – 2018)

3.4.2 ASME–American Society of Mechanical Engineers

S. No

Document Number

Title

ASME B16.5

Pipe Flanges and Flanged Fittings NPS 1/2 Through NPS 24 Metric/Inch Standard (2020)

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S. No

Document Number

Title

ASME B16.36

Orifice Flanges (2020)

ASME B16.20

ASME B16.24

ASME B16.47

ASME B16.48

ASME B31.3

ASME B46.1

ASME SEC VIII DIV 1

ASME/BPVC SEC IX

Metallic Gaskets for Pipe Flanges Ring-Joint, Spiral-Wound, and Jacketed (2017)

Cast Copper Alloy Pipe Flanges and Flanged Fittings Classes 150, 300, 600, 900, 1500, and 2500 (2021)

Large Diameter Steel Flanges NPS 26 Through NPS 60 Metric/Inch Standard (2020)

Line Blanks (2020)

Process Piping (2022)

Surface Texture (Surface Roughness, Waviness, and Lay) (2019)

BPVC Section VIII – Rules for Construction of Pressure Vessels –Division 1 (2021)

Section IX Qualification Standard for Welding, Brazing, And Fuzing Procedures; Welders; Brazers; And Welding, Brazing, And Fusing Operators – Welding, Brazing And Fusing Qualifications (2021)

ASME/BPVC SEC V

Section V Non-destructive Examination (2021)

ASME PCC-1

Guidelines for Pressure Boundary Bolted Flange Joint Assembly (2022)

3.4.3 ASTM – American Society for testing and Materials

S. No

Document Number

Title

ASTM A105/A105M

ASTM A153/A153M

ASTM A182/A182M

ASTM A262

Standard Specification for Carbon Steel Forgings for Piping Applications (2021)

Standard Specification for Zinc Coating (Hot- Dip) on Iron and Steel Hardware (2016)

Standard Specification for Forged or Rolled Alloy and Stainless-Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service (2022)

Standard Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels ( 2021)

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S. No

Document Number

Title

ASTM A350/A350M

ASTM A370

ASTM B381

ASTM A516/516M

ASTM A694/A694M

ASTM A700

ASTM A961/A961M

ASTM B564

ASTM E18

ASTM E112

ASTM E23

Standard Specification for Carbon and Low- Alloy Steel Forgings, Requiring Notch Toughness Testing for Piping Components (2018)

Standard Test Methods and Definitions for Mechanical Testing of Steel Products (2022)

Standard Specification for Titanium and Titanium Alloy Forgings (2021)

Standard Specification for Pressure Vessel Plates, Carbon Steel, for Moderate- and Lower-Temperature Service (2017)

Standard Specification for Carbon and Alloy Steel Forgings for Pipe Flanges, Fittings, Valves, and Parts for High-Pressure Transmission Service (2016)

Standard Guide for Packaging, Marking, and Loading Methods for Steel Products for Shipment (2019)

Standard Specification for Common Requirements for Steel Flanges, Forged Fittings, Valves, and Parts for Piping Applications (2021)

Standard Specification for Nickel Alloy Forgings (2022)

Standard Test Methods for Rockwell Hardness of Metallic Materials (2022)

Standard Test Method Determining Average Grain Size (2021)

Standard Test Methods for Notched Bar Impact Testing of Metallic Materials (2018)

3.4.4 BSI–British Standards Institution

S. No

Document Number

Title

BSI BS EN 10204

Metallic products Types of inspection documents (2004)

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3.4.5 MSS–Manufacturers Standardization Society

S. No

Document Number

Title

MSS SP-25

MSS SP-9

Standard Marking System for Valves, Fittings, Flanges, and Unions (2018)

Spot facing for Bronze, Iron and steel flanges (2018)

3.4.6 EEMUA- Engineering Equipment And Materials Users Association

S. No

Document Number

Title

EEMUA No.234

90/10 Copper nickel alloy piping for offshore applications Specification (2015)

3.4.7 NACE- National Association of Corrosion Engineers

S. No

Document Number

Title

NACE MR0175/ISO 15156

NACE TM0284

Petroleum and Natural Gas Industries Materials for Use in H2S-Containing Environments in Oil and Gas Production (4th Edition – 2022)

Evaluation of Pipeline and Pressure Vessel Steels for Resistance to Hydrogen-Induced Cracking (2016)

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4 PURPOSE OF DOCUMENT

4.1 General

This Specification covers the technical requirements of metallic flanges, line blanks for topside Pipingas per ASME B31.3 latest revisions. The requirements stated in the specification are supplementary to the applicable reference international codes and standards for this project.

5 GENERAL REQUIREMENT

5.1 Flanges

5.1.1

In general, the requirements specified in this document shall be applicable, unless specified otherwise.

5.1.2 All manufacturing and testing procedures, mill certificates, qualification certificates shall be

submitted for purchaser review and approval prior to start of work.

5.1.3

Supplier, sub-suppliers, and manufacturer of material shall be selected from COMPANY AVL.

Any alternate shall be proposed to the COMPANY for review and approval with full credentials and justification.

5.1.4 Flanges with rating Class 1500 and lower in sizes NPS ½ through NPS 24 and flanges with

rating class 2500 in sizes NPS ½ through NPS 12 shall conform to ASME B16.5.

5.1.5 All raised face flanges shall have a concentric serrated spiral facing finish per ASME B16.5.

5.1.6 All flange face roughness value shall be as per ASME B16.5.

5.1.7 NPS 26 and larger steel flanges shall conform to ASME B16.47 Series B for rating 150# to 600#. NPS 26 and larger steel flanges shall conform to ASME B16.47 Series A for rating 900#.

5.1.8 Flanges in sizes and/or pressure classes not included in ASME B16.5 or ASME B16.47 shall be individually designed on a case-by-case basis, using the requirements of ASME SEC VIII DIV1 Mandatory Appendix 2 “Rules for Bolted Flange Connections with Ring Type Gaskets,” including Paragraph 2-14 “Flange Rigidity.” The rigidity index for the flange (“J”) shall be determined at the seating and design conditions. Vendor/ Supplier shall submit the calculation and detailed dimensional drawings of the flanges with the bid proposal for COMPANY approval.

5.1.9 All ASTM A105/ A105M flanges shall comply with supplementary requirements S2, normalized. Normalizing shall be as specified per ASTM A 961/A 961M. Flanges above Class 300 that are already normalized as required by ASTM A105/ A105M are acceptable. This material is limited to design minimum temperatures of −29°C (−20°F) and warmer.

5.1.10 All ASTM A 350/A 350M flanges shall Comply with Supplementary Requirement S5 Special Impact Test Requirements for Flanges (Note S5.1) of ASTM A 350/A 350M. Any variation in either heat lot or heat-treatment lot requires separate testing.

5.1.11 All Titanium material shall conform to Grade 2 of the applicable ASTM Material Standard. Forgings shall conform to ASTM B381 Grade F2. All forgings shall be supplied in the annealed condition.

5.1.12 Super duplex is the term used in this specification for Ferritic-Austenitic Steel of type UNS

S32750 and UNS32760 or equivalent having nominal Chromium content of 25%.

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5.1.13 All Super Duplex Stainless steel material shall conform the applicable ASTM Material Standard.

Forgings shall conform to ASTM A182 F53/F55.

5.1.14 All Solid Inconel UNS N06625 material shall conform the applicable ASTM Material Standard.

Forgings shall conform to ASTM B564 UNS N06625.

5.1.15 Flanges Class 900 and higher, including API SPEC 6A flanges, shall be RTJ. They shall be furnished with a flat-bottom groove and finished in accordance with ASME B16.5, ASME B16.47, or API SPEC 6A.

5.1.16 Jackscrew shall be provided for all RTJ flanges.

5.1.17 Orifice flanges, Spectacle blinds / Spacers and Blinds shall be provided with jack screws for

sizes 12” and above.

5.1.18 Orifice flanges shall conform to ASME B16.36.

5.1.19 Quantities shown on Material Requisition must be understood as “pair” of orifice flanges supplied

with pressure taps equipped with a pipe plug.

5.1.20 Jackscrew shall be in the same material as the bolting assembly. Diameter shall be per

VENDOR’s standard.

5.1.21 Flange facing finish shall conform to ASME B16.5 , ASME B16.47 Series A and ASME B16.47 Series B. When flanges have been hot dip galvanized (where permitted) after fabrication, the flange gasket face serrations shall be maintained. Otherwise, spiral serrations shall be lightly machined into the gasket face. The integrity of the galvanized coating shall not be compromised by machining.

5.1.22 Cu-Ni flanges shall be in accordance to pressure system as indicated in purchase order.

5.1.23 Cu-Ni flanges shall meet the dimensional requirement as per EEMUA 234 publication while the

requirements shall comply with applicable ASTM Specification.

5.1.24 Flange bore and bore of spectacle blind (including spacer) shall match with the ID of the

connected pipes.

5.1.25 Cladded Flanges shall be in compliance with Specification for CRA weld Overlay for Piping

components For CP6S And CP7S Complexes 200-20-PI-SPC-00020.

5.1.26 All ASTM A694 F60 Flanges shall be supplied in cladded condition as follows:

a) Size range 18” and above

All bare welding neck flanges (A694 F60) hubs/welding ends shall be supplied with Bore (ID) as per flange ID established based on pipe nominal wall thickness (indicated in Material Requisition Description. (ID=Nominal Pipe OD - 2* Nominal Wall Thickness).

The ID variation of +/- 3 mm (Max.) shall be allowed with wall thickness variation of +/-1.5 mm (Max.) in accordance with Table 11 of API 5L for welded pipes.

b) Size range 6” to 16”

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The manufacturer can use wall thickness tolerances applicable for seamless pipes as per Table 11 of API 5L for these flanges hubs/welding ends, however they shall ensure that Bore (ID) variation for these flanges shall be +/- 3 mm (Max.)

These flanges internal surface shall be further cladded with Inconel 625 material with thickness 6mm (Min.) and 3mm (Min.) on gasket face & RTJ Groove in accordance with Specification For CRA Weld Overlay For Piping Components For CP6S and CP7S Complexes.

5.2 Line blanks

5.2.1 Line Blanks shall conform to ASME B16.48. Line Blank facing for Ring-Type Joint (RTJ) flanged

joints shall be female.

5.2.2 Line Blanks of rating 600# and below shall be with RF facing for metallic piping , FF facing for

Non-Metallic Piping (GRE, FRP) and FF Facing for Metallic Piping (Cu-Ni ).

5.2.3 Line Blanks of rating 900# and above shall be with RTJ Facing.

5.2.4 Blanks in a size or material not listed in ASME B16.48 shall confirm to the requirements of ASME

B31.3. The design of such blanks shall be approved by COMPANY.

5.2.5 All spectacle blinds, spacer and blanks that are over 23kgs, shall be provided with certified lifting lugs or a hole for lifting purpose. For identification purpose, generally blank will be provided with one hole and spacer with 2 holes.

6 MATERIAL REQUIREMENT

6.1 Method of Manufacture

6.1.1 All Carbon Steel, Low Temperature Carbon Steel shall be killed steel, with the primary melting process being con-arc, basic-oxygen, or electric-furnace, possibly combined with separate degassing or refining.

6.1.2 All Stainless-Steel materials shall be manufactured by electric arc or electric furnace degasses

and refined.

6.1.3 All material used shall be new and not recycled.

6.1.4 Flanges shall be forged to shape prior to machining. Flanges machined from forged bar or billets

are not acceptable.

6.1.5 Spectacle blind, spacer and blind shall be made from A105N forging or from normalized A516

Gr 60 plate for carbon steel.

6.1.6 Galvanizing of flanges shall be in accordance with ASTM A153. Threaded portion of flanges

shall be free of galvanizing.

6.1.7 Flanges made by casting and from plates are not acceptable.

6.1.8 Cu-Ni flanges shall be supplied as per EEMUA 234 and ASME B16.5.

6.1.9 Flanges mill tolerance as per ASME B16.5, B16.47 and ASTM standards.

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6.2 Chemical Composition

6.2.1 Chemical composition shall be as per the relevant ASTM specification unless restricted

otherwise, through this specification or project specification.

6.2.2 The carbon content shall be 0.23% maximum for carbon steel/ low temperature carbon steel

and as per ASTM material specification for other materials.

6.2.3 Chemical composition of the Cu-Ni material shall be as per the EEMUA-234 publication.

6.3 Heat Treatment

6.3.1 No working shall be carried out after the Heat treatment.

6.3.2 Carbon steel and low temperature carbon steel flanges shall be supplied in normalized.

6.3.3 All stainless-steel flanges shall be supplied in solution annealed condition followed by water

quenching.

6.3.4 All Cu-Ni flanges shall be supplied in annealed condition.

6.3.5 All nickel alloy flanges (UNS N06625) shall be annealed material only.

6.3.6 Heat treatment temperature, soak duration and cooling medium shall be stated on the material

test certificate and be in accordance with the relevant ASTM Specification.

6.4 Surface Finish

6.4.1 Surface finish of CS/ LTCS forged materials shall be as per ASTM A961/A 961M.

6.4.2 Finished SS flanges shall be white pickled and passivated. Pickling is not required for machined

surfaces.

6.4.3 All surfaces shall be clean, smooth and free from defects.

6.4.4 The spot facing of the flanges at the bolt holes shall be in accordance with MSS-SP-9.

6.4.5 The roughness of flanges contact face shall comply with ASME B46.1 regulation requirements and shall be 125 Ra for RF type unless differently specified in documents issued for the specific project. It shall be 500 Ra for flat face flanges.

6.4.6 The minimum hardness of grooves of RTJ flanged components shall be:

• Carbon Steel: 120 HB

• Low Temperature Carbon Steel: 150

• Stainless Steel 316/316L: 190 HB

• Super Duplex: 190 HB

•

Inconel 625: 230 HB

6.5 Sour Service Specific Requirements

6.5.1 Material, where specified for use in sour service, shall meet the requirements of NACE MR-0175 / ISO15156 Region 3 and Material Corrosion Requirement In Sour Service System For CP6S And CP7S Complexes, Doc. no: 200-20-CE-SPC-00014.

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NFPS Offshore Compression Complexes Project COMP2 SPECIFICATION FOR FLANGES AND HUBS FOR CP6S AND CP7S COMPLEXES

6.5.2 Carbon steel forged materials manufactured to ASTM A105/105M where specified for use in

sour service shall have grain size of #8 or finer per ASTM E112.

6.5.3 For low alloy steels, the following apply when vanadium, niobium and titanium are used for

alloying:

a) The soluble Aluminium to nitrogen ratio shall not be ≤ 2:1, with nitrogen ≤ 0.015 weight

percent (wt. %).

b) The material shall only be alloyed with vanadium, niobium, and/or titanium in any

combination, but not with vanadium only.

6.5.4 Carbon and low alloyed steels used for the manufacture of plates, forgings and flanges shall have CE values as set forth in this specification, based on check analysis calculated per the Dearden and O’Neill formula.

6.5.5 Austenitic stainless steels are not allowed in sour service.

6.5.6 CS/ Low Alloy Flanges shall be furnished with the Normalized, Normalized and Tempered or

Quenched and Tempered Condition.

6.5.7 Carbon equivalent (CE) as per equation below shall be 0.43 maximum for normalised and ≤ 0.42 for Quenched and Tempered flanges of carbon steel/ low temperature carbon steel / low alloy steels.

𝐶𝐸 = %𝐶 +

%𝑀𝑛 6

%Cr + %Mo + %V 5

%Ni + %Cu 15

7 WELDING

7.1 Subject to COMPANY approval, welding is permitted for rim of line blanks only, where it is not

possible to forge.

7.2 Repair of weld is permitted for weld portion only. Any Repair shall be done as per qualified and approved welding procedures unless Repair welding is made using the same welding process and WPS as used for original weld, and respecting all essential & supplementary essential variables. Repairs on overlaid flanges shall refer to 200-20-CE-SPC-00018. Repair shall be executed by the party none other than the one doing original welding. Repair welding of parent material is not permitted.

7.3 The welding procedure and welders qualifications shall be qualified in accordance to ASME Section IX and B31.3/B31.8/ASME Section VIII (as applicable), with the additional requirements specified in the referenced project specifications. For welding procedure qualification any change in brand / make of welding consumables shall require requalification. Welding shall be following Piping Welding and NDE Specification for CP6S and CP7S Complexes 200-20-CE-SPC-00019.

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8 TESTING AND INSPECTION

8.1 Testing and examinations shall be carried out after the final heat treatment.

8.2 Test samples for production testing shall realistically represent the actual component and shall preferably be from specimen taken from heat treated or hot finished component to reflect the actual properties of component.

8.3 Tensile test, hardness tests shall be carried out for each heat and heat treatment load.

8.4 For Flat forgings the sample location shall be taken from the center of the Forging. For Cylindrical

forgings the sample shall be ½ T x T.

8.5 Forgings qualified with test specimens taken from a test blank or bar are not acceptable.

8.6 The testing shall be carried out on the component with the heaviest wall thickness within the load.

8.7 Sampling lots are group of items from a common source. A single lot must not contain more than

one heat treat/lot number.

8.8 Representative samples are selected randomly and inspected/tested to determine the lot’s

acceptability.

8.9 Representative sample sizes shall be as follows:

Table 8-9-1 : Sample Size

Lot Size

Sample Size (from MIL-STD- 1916)

15 or less

16–25

26–50

51–90

91–150

150

100%

5 pieces

8 pieces

13 pieces

20 pieces

to MIL-STD-1916

for sample size, refer accept/reject criteria for Level II, AQL 1.0 or below

8.10 Hydrostatic Testing

8.10.1 Hydro-testing of flange is not required. However, these components shall be suitable to withstand the pressure corresponding to minimum proof strength at room temperature without component distortion or failure.

8.10.2 Cu-Ni flanges shall be suitable to withstand pressure of 1.5-time design pressure without

leakage and distortion.

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8.11 Corrosion Testing

Corrosion testing shall be done in accordance with Material Corrosion Requirement in Sour Service System for CP6S AND CP7S Complexes 200-20-CE-SPC-00014.

8.12 Tensile Testing

8.12.1 Tensile tests shall be performed in accordance with ASTM A370.

8.12.2 The acceptance criteria shall be according to corresponding ASTM Specification.

8.13 Hardness Testing

8.13.1 Hardness tests shall be performed in accordance with ASTM E18 for CS/LTCS and relevant

ASTM material specification for other materials.

8.13.2 Hardness measurements shall be carried out after final heat treatment.

8.13.3 Deleted.

8.13.4 For components designated for use in NACE service maximum hardness limitations stated in NACE MR-0175 / ISO 15156 and Material Corrosion Requirement in Sour Service System for CP6S AND CP7S Complexes 200-20-CE-SPC-00014 shall apply.

8.13.5 As required by ASME B16.20, the ring joint flange material shall be higher hardness than that of

the mating gasket.

8.13.6 The minimum hardness of the Grooves in the RTJ flanges shall be as per section 6.4.6

8.14 Impact Testing

8.14.1 Impact testing shall be carried out where specified in material description, purchase order or

required as per ASME B31.3.

8.14.2 LTCS material Charpy impact testing shall be carried out as per ASTM E23 at - 46 °C as

specified in Purchase order.

8.14.3 The Minimum Impact Test value: Min. 24 J average for 3 specimens; Min. 19 J for individual specimen at -29°C for CS (or -46°C for LTCS). Test shall be performed according with relevant ASTM standard requirements.

8.14.4 All ASTM A350 LF2 CL1 and ASTM A694 F60 Flanges with UNS N06625 Weld Overlay flanges

shall be impact tested at -46°C, in accordance with the material description.

8.14.5 All carbon steel flanges for sour services shall be impact tested. Impact testing temperature is

shall be done in accordance:

• A105 at -29°C. • A350 LF2 CL1 at -46°C. • A694 F60 at -29°C / -46°C (As per applicable Piping Class).

8.15 Metallographic Examination For LTCS

Grain size evaluation in accordance with ASTM E112 shall be carried out at the same area as the location of specimens for mechanical testing. The area examined shall be a minimum of 10 x 10mm (or

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NFPS Offshore Compression Complexes Project COMP2 SPECIFICATION FOR FLANGES AND HUBS FOR CP6S AND CP7S COMPLEXES

full section thickness for material thinner than 10mm). The microstructure on a suitably etched specimen shall exhibit a grain size of ASTM #8 or finer.

8.16 Hydrogen-Induced Cracking (HIC) Testing For Carbon Steel And Low Alloy Steel

8.16.1 For sour service, the plates used for carbon and low alloy steel spectacle blinds/spacers/lifting eye on flanges where specified for use in sour service shall be Hydrogen-Induced Cracking (HIC) resistant to meet the following acceptance criteria when tested in Solution A of NACE TM0284 for 96 hours:

a) Crack Length Ratio (CLR) ≤ 10.0%

b) Crack Thickness Ratio (CTR) ≤ 1.5%

c) Crack Sensitivity Ratio (CSR) ≤ 2 %

8.16.2 The test specimen’s location, test procedure applied, test duration and temperature for HIC

testing shall be per NACE TM0284.

8.16.3 Test specimen shall not be flattened.

8.16.4 After testing, evaluation of test specimens shall be sectioned in accordance to the provisions of

NACE TM0284.

8.16.5 In addition to the reporting requirements of NACE TM0284, the report shall include the following:

a) A description of the visual appearance of each coupon (e.g., a tabulation of the number of

blisters and size range for each coupon).

Individual section CSR, CLR, and CTR for each of the three cross-sections of each coupon.

c) Coupon average CSR, CLR, and CTR (i.e., the average of the three cross-sections for each

coupon).

d) Average CSR, CLR, and CTR (i.e., average of the nine cross-sections examined from the

three coupons tested for each production form).

8.17 Inspection

8.17.1 Inspection shall be conducted as per the project specification.

8.17.2 Inspection and witnessing during various stages of manufacture, testing and final inspection shall form a part of scope of purchase order. Supplier shall provide free access to supplier / sub- supplier facilities for purchaser or purchaser’s representative or third-party inspection agency to carry out inspections, test witnessing and final inspection as per agreed hold points of Inspection and Test Plan.

8.17.3 Where inspection and tests are required on randomly selected items, manufacturer shall make available a complete lot for purchaser or purchaser’s representative or third-party inspector to select randomly the items to conduct inspect or test as required by purchase order. Manufacturer’s pre-selected items from lot and presented for inspection or testing will not be accepted.

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9 NON-DESTRUCTIVE EXAMINATION (NDE)

Extent of NDT examination shall be as per respective ASTM specifications, approved ITP, NDE methods and project document Piping Welding and NDE Specification for CP6S and CP7S Complexes 200-20-CE-SPC-00019 (As applicable).

9.1 Visual Examination

9.1.1 Each item shall be visually examined externally and wherever possible internally.

9.1.2 VENDOR shall submit the NDE procedure for COMPANY approval.

9.2 Magnetic Particle Examination

9.2.1 10% of total supplied flanges shall be subject to 100% MT examination to all accessible areas.

9.2.2 The acceptance criterion shall be in accordance with ASME Section VIII, Division 1 – Appendix 6. If discontinuities exceed limitations on any flange examined during the initial 10% requirement, a further 10% shall be examined. If discontinuities are found during this period of testing, 100% of all flanges shall be examined.

9.2.3 NDT inspector qualification shall be minimum Level II, unless specified otherwise.

9.3 Liquid Penetrant Examination

9.3.1 Liquid penetrant examination shall be carried out only for non-magnetic components such as SS, Duplex SS, Ni-Alloy, etc.. Liquid penetrant testing shall be carried out after final machining.

9.3.2 LP testing shall be carried out according to ASME V Article 6. Acceptance criteria shall be as per

ASME VIII Div. 1 Appendix 8.

9.3.3 NDT inspector qualification shall be minimum Level II, unless specified otherwise.

9.4 Ultrasonic Examination

9.4.1 Ultrasonic examination where specified in purchase order or project specification shall be carried

out as per project specifications and relevant ASTM specification.

9.4.2 Acceptance criteria shall be as per ASME VIII Div. 1 Appendix 12.

10 POSITIVE MATERIAL IDENTIFICATION

10.1 All flanges/line blanks shall be marked in accordance with MSS-SP-25 to ensure full traceability

to melt and heat treatment lot.

10.2 Flanges/line blanks shall be marked as per the requirements of corresponding ASTM

Specification.

10.3 Marking shall include the size (NPS) pipe schedule number or nominal wall thickness in millimeters, rating, charge or heat number and the manufacturer’s unique symbol and material specification.

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NFPS Offshore Compression Complexes Project COMP2 SPECIFICATION FOR FLANGES AND HUBS FOR CP6S AND CP7S COMPLEXES

10.4 Flanges/line blanks shall be colour coded in a sufficient number of locations to ensure

identification of storage, fabrication and erection. Refer to Doc. no.:200-20-PI-SPC-00017, Specification for Material Traceability and Documentation Requirements Doc. no.:200-20-PI- SPC-00017.

11 MARKING AND TRACEABILITY

11.1 All flanges/line blanks shall be marked in accordance with MSS-SP-25 to ensure full traceability

to melt and heat treatment lot.

11.2 Flanges/line blanks shall be marked as per the requirements of corresponding ASTM

Specification.

11.3 Marking shall include the size (NPS) pipe schedule number or nominal wall thickness in millimeters, rating, charge or heat number and the manufacturer’s unique symbol and material specification.

11.4 Flanges/line blanks shall be colour coded in a sufficient number of locations to ensure

identification of storage, fabrication and erection. Refer to Doc. No.:200-20-PI-SPC-00017 ,Specification for Material Traceability and Documentation Requirements Doc. No.:200-20-PI- SPC-00017.

12 CERTIFICATION

All material certification shall be in accordance to the EN 10204 Type 3.1 in general and Type 3.2 for Sour services complying with NACE MR 0175/ISO 15156. Material Certificate shall show the chemical composition, mechanical test records, heat treatment records and any other records of supplementary tests specified in purchase order.

13 HANDLING, PACKING, PRESERVATION AND STORAGE

13.1 Material handling, packaging, preservation and storage shall be as per project specification and

purchase order requirements.

13.2 Flange face shall be protected properly to avoid damage.

13.3 Material handling shall ensure to prevent or minimize the possibility of contamination.

13.4 Use of bare steel hooks, chains or lifting forks without the use of protective insulating material is

not permitted.

13.5 Brushing or descaling may be done using Stainless steel wire brushes designated for use only on

stainless steel products, may be used for brushing and descaling.

13.6 Preservation and protection of components shall be as per project specifications and

requirements of ASTM A700.

13.7 Flanges shall be packed and in such a way as to prevent damage of machined parts. Suitable

protection shield, or cover shall be provided on the gasket contact surface.

13.8 Flanges shall be marked and shipped in crates, grouped according to pressure/class rating where

possible.

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NFPS Offshore Compression Complexes Project COMP2 SPECIFICATION FOR FLANGES AND HUBS FOR CP6S AND CP7S COMPLEXES

13.9 Wooden boxes shall be fumigated and certified to requirements of ISPM 15.

14 DOCUMENTATION

14.1 Vendor shall certify that all components are in compliance with the relevant ASTM specifications,

codes and project specification referred here-in and enclosed with purchase order.

14.2 Post-manufacture

testing and examination records, as normally required of material manufacturer. For example, indication of testing and/or examination performed, measuring and test equipment used, acceptance criteria, acceptance status, and inspector performing test/examination.

14.3 List below gives the minimum required supplier documents. However, supplier shall submit all the documents / reports as a part of supplier documentation as per purchase order. All documents / certificates shall be signed by responsible person of supplier.

•

EPC CONTRACTOR / COMPANY Approved Test procedures

Mill Certificate /CMTR

Mechanical Test Records

Chemical Test Records(included in CMTR)

Dimensional Test Records

Third Party Certification Agency’s endorsed Certificates and Test Reports for Sour Service materials

WPS/PQR if applicable

Corrosion Test Reports as applicable

Approved QCP and ITP

Metallographic Test records

Impact Test Records

Heat Treatment Records

Hardness Test Records

Non-Destructive Test Records (MT / LP / Radiography / UT) as applicable

PMI test Records

Intergranular Corrosion Tests (as applicable)

Pickling and Passivation Records (as applicable)

Other test reports for Cu-Ni (as applicable)

Shipping documents, examination and acceptance status

Sampling verification performed

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Project: Q-21699 - Saipem COMP2 Folder: RFQ Files

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