Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

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

COMPANY Contract No.: LTC/C/NFP/5129/20 CONTRACTOR Project No.: 033764

ASSET

: NFPS

Document Title

:

SPECIFICATION FOR EQUIPMENT GROUNDING AND BONDING FOR COMP3 PROJECT

COMPANY Document No.

:

200-91-EL-SPC-00034

CONTRACTOR Document No.

:

033764-E-D-18-SPM-EL-S-00018

Discipline

: ELECTRICAL

Document Type

: SPECIFICATION

Document Category/Class

:

1

Document Classification

:

Internal

B

29-Jan-2025

Issued for Approval

Pretty Stephy

A

07-Jan-2025

Issued for Review

Pretty Stephy

Electrical Engineer

Sauhardha Murthy Sauhardha Murthy

KSB Sankar

KSB Sankar

Deputy PSL (GF)

PSL

REV.

DATE

DESCRIPTION OF REVISION

PREPARED BY

REVIEWED BY

APPROVED BY

Saipem S.p.A

www.saipem.com

THIS DOCUMENT IS PROPERTY OF QatarEnergy LNG. THIS DRAWING OR MATERIAL DESCRIBED THEREON MAY NOT BE COPIED OR DISCLOSED IN ANY FORM OR MEDIUM TO THIRD PARTIES, OR USED FOR OTHER THAN THE PURPOSE FOR WHICH IT HAS BEEN PROVIDED, IN WHOLE OR IN PART IN ANY MANNER EXCEPT AS EXPRESSLY PERMITTED BY QatarEnergy LNG.

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NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

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

SPECIFICATION FOR EQUIPMENT GROUNDING AND BONDING FOR COMP3 PROJECT

REVISION HISTORY

Revision

Date

Revision Description

A1

31-Dec-2024

Issued for Inter Discipline Check

A

B

07-Jan-2025

Issued for Review

29-Jan-2025

Issued for Approval

HOLDS LIST

Hold No

Hold Description

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NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

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

SPECIFICATION FOR EQUIPMENT GROUNDING AND BONDING FOR COMP3 PROJECT

TABLE OF CONTENTS

1

1.1

1.2

2

2.1

2.2

3

3.1

3.2

3.3

4

5

6

INTRODUCTION … 4

Project Objective … 4

Project Scope … 4

DEFINITIONS AND ABBREVIATIONS … 7

Definitions … 7

Abbreviations … 8

REFERENCES, CODES AND STANDARDS … 8

Company Documents … 9

Project Documents … 10

International Codes … 10

PURPOSE … 11

GENERAL … 11

EQUIPMENT EARTHING REQUIREMENTS … 11

6.1

Instrument Earthing Requirements … 12

7

7.1

7.2

7.3

7.4

8

9

10

11

DESIGN REQUIREMENTS OF EARTHING SYSTEMS… 12

General … 12

Earthing and bonding … 13

Earthing Buses … 16

Static Electricity and Stray Current Protection Earthing … 17

LIGHTNING PROTECTION … 17

INSTALLATION … 17

TESTING AND INSPECTION … 18

NON-COMPLIANCE / DEVIATION … 18

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NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

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

SPECIFICATION FOR EQUIPMENT GROUNDING AND BONDING 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.

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

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SPECIFICATION FOR EQUIPMENT GROUNDING AND BONDING FOR COMP3 PROJECT

• 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 PL5 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 and tie- in, WHP12N-new J tube installation, E&I migration, WHP6N/RP4N/WHP4N-E&I migration (Pre-CP4N), WHP13N and RP6N interconnection to NFB.

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” PL9 to WYE on existing 38” trunkline PL49including

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 (East)- FO Tie-in

(East)/BVS

Power & Control modifications, LQ6S/LFP 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.

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

• 1 subsea composite Cable from CP8S to RP11S (or from RP8S to RP11S as Option). • New Fuel Gas 8” CRA Spur-line and flanged riser from Subsea skid to RP8S.

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NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

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

SPECIFICATION FOR EQUIPMENT GROUNDING AND BONDING FOR COMP3 PROJECT

• 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)

and FO Cable from RT2 to Barzan WHP1.

• New Fuel Gas 8” CRA Spur-line and flanged riser from Subsea skid to RT2 • 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. topside existing and

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

• Decommissioning at

Figure 1.2.1: NFPS Compression Project COMP3 Scope

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SPECIFICATION FOR EQUIPMENT GROUNDING AND BONDING 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

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,

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

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.

VENDOR (SUPPLIER)

A party who is responsible to manufacture and supply equipment and/or services

SUB-VENDOR (SUB-SUPPLIER)

A party who is responsible to manufacture and supply equipment and/or services under responsibility of main VENDOR

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

SPECIFICATION FOR EQUIPMENT GROUNDING AND BONDING FOR COMP3 PROJECT

2.2 Abbreviations

Code

AC

BOM

DC

EMC

EPC

Definition

Alternating Current

Bill Of Material

Direct Current

Electromagnetic Compatibility

Engineering Procurement Construction

FEED

Front End Engineering Design

LV

Low Voltage

QE LNG

QE LNG-N

QE LNG-S

RG

RGE

RGA

RL

RP

JB

TDS

WHP

mA

MOV

Qatar Energy LNG.

Qatar Energy LNG. North

Qatar Energy LNG. South

Ragas Company Limited

Ras Gas Expansion

Ras Gas Alpha

Ras Laffan

Riser Platform

Junction Box

Technical Data Sheet

Well Head Platform

milli Ampere

Motorized Operating Valve

3 REFERENCES, CODES AND STANDARDS

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

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

SPECIFICATION FOR EQUIPMENT GROUNDING AND BONDING FOR COMP3 PROJECT

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 Policies and Procedures

c) Project Specifications

d) Industry Codes and Standards

e) COMPANY and CONTRACTOR’S lessons learned

If CONTRACTOR / VENDOR 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 / VENDOR shall not proceed with any deviation to the Specifications without prior COMPANY APPROVAL.

3.1 Company Documents

DOCUMENT NO.

[1] ONS-OTS-MNT-003

[2] PRJ-PJL-PRC-080

[3] PRJ-PJL-PRC-006

[4] PRJ-PJL-PRC-007

[5] PRJ-PJL-PRC-004

[6] TCH-000-PRC-005-F01

[7] TCH-000-PRC-005-F02

[8] TCH-AIG-PRC-044

[9]

IAP-NAT-INFA

[10] PRJ-PJL-PRC-005

[11] PRJ-PJL-PRC-048

[12] PRJ-PJL-PRC-049

DOCUMENT TITLE

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

Tag Management System

Project Information Handover Procedure

Smart Plant Engineering Applications and Drafting (CAD) Standard Procedure.

Facilities Engineering and Vendor Document Numbering Procedure

ICS Security Engineering Switch and Router Hardening Check List (Typical)

ICS Security Engineering Firewall Hardening Check List (Typical)

Industrial Control System Security Engineering Specification Procedure

Qatar National Information Assurance : National Industrial Control System Security Standard

Facilities System and Unit Number Codes and Descriptions

Facilities Documentation Metadata Requirements

Project Information Handover, Verification and Acceptance Procedure

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SPECIFICATION FOR EQUIPMENT GROUNDING AND BONDING FOR COMP3 PROJECT

DOCUMENT NO.

[13] INF-ISG-POL-001

[14] IM-VDR-T001

[15] PRJ-PJL-PRC-008

3.2

Project Documents

DOCUMENT TITLE

Information Classification Policy

Template for Vendor Document numbering

Qatargas Equipment Numbering Philosophy Procedure.

DOCUMENT NO.

DOCUMENT TITLE

[16] 200-20-EL-DEC-00001

Electrical Design Basis for COMP3 Project.

[17] 200-91-EL-SPC-00031

Specification For Electrical Packaged Equipment for COMP3 Project.

[18] 200-91-EL-SPC-00033

Specification For Electrical Power Cables, Control and Earthing Cables for COMP3 Project

[19] 200-91-EL-DTS-00013

Data Sheet for Power, Control and Earthing Cables for Comp3 Project

[20] 200-91-EL-DWG-00032

Electrical Installation Details for Power, Lighting and Earthing for Comp3 Project

[21] 200-20-PE-DEC-00004

Project Basis of Design for COMP3 Project.

[22] 200-20-CE-DEC-00006

Material Selection Philosophy for COMP3 Project.

[23] 200-20-SH-DEC00013

Technical Safety Basis of Design (Offshore)

200-20-SH-SPC-00018

Human Factor Engineering (HFE) Workplace Design Specification

3.3

International Codes

REFERENCE

DOCUMENT TITLE

[24] NFPA 70

[25] API RP14F

[26] IEEE 142

[27] IEC 60079-14

[28] IEC 60228

[29] IEC 60446

[30] IEC 61000

National Electrical Code

Recommended Practice for Design and Installation of Electrical Systems for Offshore Production Platforms

Recommended Practice for Grounding of Industrial and Commercial Power Systems

Electrical Installations in Explosive Gas Atmospheres (Other than Mines)

Conductors of insulated cables

Identification of conductors by colors or numerals

Electromagnetic Compatibility (EMC)

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SPECIFICATION FOR EQUIPMENT GROUNDING AND BONDING FOR COMP3 PROJECT

[31] IEC 61034

Measurement of Smoke Density of Cables Burning Defined Conditions

[32] IEC 61892

Electrical installations

[33] IEC 62305-3

Protection Against Lightning - Part 3: Physical Damage to Structures and Life Hazard

4 PURPOSE

The purpose of this document is to define the minimum requirements for application, design, installation, and testing of safe and effective equipment earthing and bonding system for NFPS Compression Project as per Electrical design basis (Doc. No: 200-20-EL-DEC-00008, Cl. 9.16.21)

The focus of this specification is to address earthing and bonding for personnel safety, for equipment, for earth-fault protection and for mitigation of static electricity.

5 GENERAL

Equipment earthing and bonding shall be provided in accordance with IEC 61892. Compliance to IEEE 142, NFPA 70 and API RP14F is acceptable subject to COMPANY approval.

6 EQUIPMENT EARTHING REQUIREMENTS

The following items shall be connected to the equipment earthing systems either directly or through bonding:

a) Motor frames, and transformer frames. The motor terminal box shall be separately

bonded to earth, if it is not integrally cast with motor frame

b) Non-current-carrying metallic parts of electrical equipment and installations, such as enclosures for panel, distribution board, switchgear, motor control centre, metallic cable ladder / tray and metallic fences

c) Structural columns of buildings, bus supporting structures, towers, and platforms

d) Engine-driven rotating equipment

e) Metallic messengers of self-supporting cables

f) Tanks, vessels, stacks, exchangers, and similar equipment not directly welded to a

earthed supporting structure

g) Exposed conductive materials enclosing electrical conductors, such as metallic conduit; electrical metallic tubing; metallic armouring, sheaths, and shields; cable ladders and trays; equipment racks.

h) Pipe support columns in process areas at intervals normally not exceeding 22.9m (75 ft)

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SPECIFICATION FOR EQUIPMENT GROUNDING AND BONDING FOR COMP3 PROJECT

i) Loading and unloading facilities.

j) Earthing buses.

6.1

Instrument Earthing Requirements

Separate earthing systems shall be provided for the following Non- Intrinsically safe system (N.I.S) equipment.

a) Stanchion

b) Instrument junction box

c) Control panel

d) Field instruments enclosure.

e) Stainless steel cable ladder / tray.

7 DESIGN REQUIREMENTS OF EARTHING SYSTEMS

7.1 General

1. For offshore applications, the primary earthing consists of earthing network including busbars and connecting earthing cables. The secondary earthing consists of connections of equipment to primary earthing systems.

2. For offshore applications, the steel structure of the platform shall form the main earthing bus, with the steel jacket legs acting as the electrodes. All steel must be electrically continuous either by welding or bonding. For welded equipment’s additional earthing conductor is not required. All items of equipment to be earthed shall be securely connected to the structure by a separate earthing conductor. For offshore applications, the bolting of equipment to an earthed supporting structure is not an acceptable earthing means.

3. For offshore applications, all cables shall include a separate earthing conductor for

equipment earthing.

a) All AC power cables will have an earth wire terminated on the earth bus. b) All cable armour shall be earthed.

4. Other Equipment such as support stands, junction box, cable gland, lighting enclosure,

motor control station and other metallic equipment shall also be earthed.

5. All motor branch circuits, and power distribution feeders shall include a separate earthing

conductor for equipment earthing.

6. The non-current-carrying metal parts of electrical equipment and the metallic racks or structures provided for equipment support shall be earthed by one of the following applicable methods:

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a) Where the circuit conductors to the equipment, rack, or structure are enclosed in a non- metallic cable ladder / tray. The earthing conductor shall be connected at the earth bus or other connection point at the supply side and terminated at the equipment, rack, or structure.

b) Where the circuit conductors are enclosed in cable ladder / tray / conduit and exposed to severe corrosion, either metallic or non-metallic, the earthing method shall be same as above.

7. Electrical equipment metallic enclosures that are bolted directly or in electrical contact with rack or structures provided for their support, are considered effectively earthed and do not require additional earthing.

8. Hydrocarbon, steam, or other process lines shall not be used for earthing purposes.

9. All major electrical distribution equipment shall have a minimum of two earthing

connections.

10. Two numbers of diagonally opposite earthing conductors are required to bond the main transformers,

components of switchboards, and UPS units) to the platform steel work/main structure beam

the generation and distribution systems (namely

11. All non-electrical metallic equipment and installation not welded to structural steel framework including skid mounted packages, vessel, steel structures etc. shall be provided with (diagonally opposite where possible) earthing bosses welded to the equipment skid.

12. Earthing conductors will then be connected to the equipment earthing from main steel

structure beam.

13. The metallic armour of cables shall be earthed by the use of cable terminators.

14. Bolted penetration plates shall be provided with a separate earthing lug.

15. Earthing for the Distributed Control System (DCS), Emergency Shutdown System (ESD) and Fire & Gas Systems (F&G) shall be in strict accordance with VENDOR requirements. The “Clean” earth system shall be used for DCS, ESD, F&G and other sensitive electronic equipment signal earthing according to the VENDOR requirements. Also, provision shall be made to isolate the clean earth system completely from the safety earth system.

Ground potential rise of electrical “safety earth” during Phase-Ground fault may be significant until fault is cleared by specific protection device. Segregation of electrical “safety earth” and “Clean” earth must be maintained throughout the facility to avoid potential impact of ground potential rise on sensitive electronic equipment during electrical faults on medium voltage equipment’s

16. Electrical and instrument earthing system shall be segregated.

7.2 Earthing and bonding

Earthing and bonding system shall comply with the requirements of IEC 61892-6, IEC 60092-

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350 and IEC 60079-14

Earthing conductors shall be soft drawn, stranded, insulated or tinned copper, except where standard practices or specific requirements dictate the use of other materials. The conductors shall be circular complying with IEC 60092-350 and shall meet the requirements of IEC 60228.

The steel deck and structure of an offshore installation is an inherently very low impedance structure capable of conducting earth fault currents as well as high frequency disturbing currents from lighting strikes without giving rise to sparks, dangerous touch voltages or transients that are destructive for electronic equipment. Good electrical continuity is achieved by welding, so that earth bonding cables need not be used between pieces of non- electrical equipment and between equipment and the steel deck. If facility/package is built in modules, the modules need to be bonded together if they are not welded.

In general, all exposed metal of electrical items, equipment and installation other than current carrying parts will be double bonded and earthed, that is, earthed via a separate earthing conductor connected from equipment frame externally to the platform steel structure. Earthing conductors are required to bond the main components of the generation and distribution systems (namely transformers, switchboards, motors, UPS units, battery stands/racks etc.) to the structure steel work.

Earth conductors connected to individual switchgear and control gear assemblies shall be sized so that their total cross-sectional area is capable of carrying the rated short circuit capacity of the installation until it will be cleared by protection system. The metallic enclosure of electrical equipment and all non-current carrying metal parts shall be connected to the structure steel work.

Bonding to prevent building up of static as per the requirements of IEC60079-32-1 i.e. in order to prevent dangerous build-up of static charges resulting from the flow of fluid in conductive piping, the resistance per unit length of pipe, fitting, etc. shall not exceed 1 mega- ohm per meter, liquids flowing through insulating pipes can generate high charge levels and voltage at the pipes walls. The resistance to earth from any point in the piping system shall not exceed 1 mega-ohm. If applicable Plastic and GRP pipes shall be earthed at regular intervals as required to vendor recommendations or be conductive type.

All non-electrical metallic equipment and installation not welded to structural steel framework including skid mounted packages, vessel, steel structures etc. shall be provided with (diagonally opposite where possible) earthing bosses welded to the equipment skid. Earthing conductors will then be connected to the equipment earthing from main steel structure beam. Where driven equipment, vessels, tanks, instruments etc. comprising part of a package is directly welded to the Package, no additional earth connection is required.

Two numbers of diagonally opposite earthing conductors are required to bond the main components of the generation and distribution systems (namely transformers, switchboards, motors and UPS units) to the platform steel work/main structure beam.

The metallic enclosures of electrical equipment shall be bonded to the platform steel structure, which acts as an earth grid. The metallic enclosures of non-electrical equipment, e.g. vessels, shall also be bonded to the platform steel structure by means of earth boss. At least two earthing bosses diagonally opposite, suitable for the connection of earthing cable

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shall be provided for the purpose of connecting the package unit to the main earth system. The bosses shall be of a SS316 material.

Bonding or earthing circuit protective conductors shall be single core earthing cable, stranded copper, Class 2, in accordance with IEC 60228. Insulation shall be green and yellow.

For earth wire that run together with current carrying conductor in as cable, the earth cable size shall not be less than the size required by Table 1 of IEC 61892-2 as tabulated below.

Table 1: Size of earth continuity conductors

Cross-section Q of associated current carrying conductor mm2

Minimum cross section of earth conductor

Q ≤ 16 mm2

Q > 16 mm2

Q

50% of the current-carrying conductor, but not less than 16 mm2

The minimum size of equipotential earthing conductor shall be in accordance with below table

Table 2: Equipotential Bonding Cable Size

Intended use

Conductor Size

Main loop

Loop interconnection

Power transformer enclosure

Building and Pipe Rack Steel

Bus enclosure

Building earth bus

Control panel

70 mm2 70 mm2 70 mm2

35 mm2 70 mm2 70 mm2

35 mm2

Switchgear and MCC Earthing bus

As per fault current

Other Equipment such as support stands, junction box, cable gland, lighting enclosure, motor control station and other metallic equipment. Metallic Cable Ladder and Tray Equipment Skid Pump and Motor Tank, Columns and Tall Structure

Min 2.5 mm2

16 mm2 70 mm2 35 mm2 70 mm2

1. Insulated or tinned copper conductors shall be provided in corrosive environments (H2S,

acids, caustics, etc.).

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Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

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

SPECIFICATION FOR EQUIPMENT GROUNDING AND BONDING FOR COMP3 PROJECT

2. Insulated earthing conductors shall be identified by green-colored insulation or jackets for clean earth system and green/yellow-colored insulation or jackets for safety earth system. Colour coding shall be in accordance with IEC 60445.

3. For earthing wire that run together with current carrying conductors in a cable, the earth

cable size shall not be less than the size required by Table 1 of IEC 61892-4.

4. For lighting and small power cabling parallel earth conductor wire size shall be the same as the phase conductor size. The use of 50% cross section for earthing conductor for lighting and small power cabling is not permitted.

5. The earthing requirements of Table 2 shall be in addition to that provided by the earthing capability of the metallic armour, sheath, individual earthing conductor, or conduit originating at the supply.

6. Conductors for earthing equipment shall not be looped between equipment. Equipment to be earthed shall be connected directly to earthing electrodes, earthing connection buses, or the main earthing grid.

7.3 Earthing Buses

1. Earthing buses shall be provided in the room where several electrical or instrument equipment’s are installed. This is to provide easy access to earth electrical equipment and to eliminate repainting structural surface for installing future equipment earth.

2. Earthing buses shall be installed at specified locations and connected to the earthing grid. These buses shall be used for connecting the earthing conductors from several pieces of equipment that may be in the immediate area. All earthing buses shall be tinned.

3. Field-installed earthing buses shall consist, as a minimum, of 6 mm thick by 38 mm wide

(1/4 in by 1½ in) tinned, copper bars.

4. Earthing buses shall be mounted on steel columns or structures.

5. Equipment earthing buses over 1520 mm (60 in) in length shall have two connections to

the earthing grid.

6. Electrical earthing bus and instrument earthing bus shall be segregated.

7. DB shall be completely enclosed, self-supporting and suitable for floor or wall

mounting as indicated in the Technical Data Sheet.

2. Cover bolts or nuts shall be retained in place when undone (captive bolts and nuts).

3. The degree of protection as per IEC 60529 for any assembly shall be IP42 for indoor located panels. The impact resistance of enclose shall be at least IK 08 per IEC

5. Anti-condensation heater shall be provided inside the assembly. The heating system shall be separately protected and switched for isolation purposes by means of a miniature circuit breaker in combination with an earth leakage protecting device of 30

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Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

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

SPECIFICATION FOR EQUIPMENT GROUNDING AND BONDING FOR COMP3 PROJECT

mA sensitivity. When the heating system is live, this shall be indicated by means of a prominently situated red light.

7.4 Static Electricity and Stray Current Protection Earthing

1. Earthing and bonding requirements to prevent static electricity buildup and stray currents

shall be provided in accordance with NFPA 30, NFPA 70, and API RP 2003.

2. Objects subject to static charge accumulation shall be earthed.

3. Earthing conductors shall be flexible, sized to effectively remove static charge. The fixed

end of the earthing conductor shall be connected to an earth grid.

4. The free end of the earthing conductor shall be provided with a detachable clamp suitable

for the earthing application.

8 LIGHTNING PROTECTION

In general structure lightning protection shall be in accordance with IEC 62305. Any structure within a zone of protection may be considered to be adequately shielded against lightning so that further protection is not required.

1. Offshore platform topside shall be of fully structural steel construction welded to the jacket and the jacket naturally connected to earth (sea). Hence lightning protection system for the fixed offshore platforms shall be based on the lightning study. As additional safety measure, the tall structures on the platform top deck and sensitive instrument systems shall be provided with the following lightning protection:

2. Pedestal Cranes: separate lightning protection shall not be required. The Crane

Pedestal shall be securely bonded to the platform steel structure.

3. Tall structures (e.g. flare tower and crane) on platform shall be protected against lightning by effectively earthing them to the nearest platform primary steel work, thus providing a direct low impedance path for the lightning discharge to earth.

4. Where the metal frame or steel structure is not welded to platform deck or steelworks, and therefore is not continuous to earth, adequate bonding with test links shall be provided.

The number of down-conductors shall not be less than two and should be distributed around the perimeter of the structure to be protected, if the LPS is installed on the structure itself. The separation distance between down-conductors shall be as per Table 4 in IEC 62305-3.

Material, configuration and minimum cross-sectional area of down-conductors shall be as per Table 6 in IEC 62305-3.

9

INSTALLATION

1. Compression-type connectors or mechanical-type connectors shall be used for

equipment earthing conductor termination.

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Classification: Internal

NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT

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

SPECIFICATION FOR EQUIPMENT GROUNDING AND BONDING FOR COMP3 PROJECT

2. Earthing connections shall be made only to surfaces that are clean and dry. Metal surfaces shall be cleaned to remove all scale, rust, grease, and dirt. Copper and galvanized steel shall be cleaned to remove any foreign substance before making welds or connections.

3. A semiconducting, corrosion-inhibiting compound shall be applied to all connection surfaces prior to connection. An insulating, corrosion inhibiting compound shall be applied to all exposed surfaces after the connection is made (3M Scotch Kote or equal).

4. Earthing connections to tanks and vessels shall be made to integral structural members or to specifically provide earthing lugs or pads. Earthing connections shall not be made to the body of the tank or vessel.

5. In additional to joint plate, Flexible copper bonding straps shall be provided around all

metallic cable ladder / tray expansion joints. Jumpers shall be installed across cable tray joints and any hinged cable tray connections

6. For offshore applications, it is preferred that conduit earthing be accomplished by the use of welded hubs. Approved screw tight conduit hub fittings that are watertight and provide a positive earth are acceptable.

7. All the fastener materials for earthing shall be suitable for offshore environment.

8. Metallic armour and sheaths of multiconductor cables shall be bonded and earthed in

accordance with the following:

   a. Bonded together and earthed at each cable termination
   b. Bonded together at each splice and bonded across each splice
   c. Bonded together and to equipment metal enclosures at the load end

10 TESTING AND INSPECTION

The earthing system shall be tested in accordance with applicable IEC 61892-4 and IEEE Guides and Standards for Grounding.

11 NON-COMPLIANCE / DEVIATION

If any of the requirements of this Specification cannot be met, VENDOR/SUPPLIER must provide written notification of non-compliances, with explanations, in accordance with project instructions. This notification will be evaluated and must have COMPANY approval before final acceptance.

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