GB 46766-2025Safety specification for offshore oil & gas fixed platform (English PDF)

海洋石油固定平台安全规范

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Issued by

State Administration for Market Regulation; Standardization Administration of China

Level / Type

National · Mandatory

Issue date

October 31, 2025

Implementation date

May 1, 2026

Scope

GB 46766-2025 is the English-translated version of 海洋石油固定平台安全规范.

GB 46766-2025 is the Chinese national standard on safety specification for offshore oil & gas fixed platform, in the field of environment and health protection, safety. It carries no /T suffix, which in the Chinese system means compliance is mandatory: a product or a practice within its scope has to meet it to be lawfully made, sold or carried out in China. It was issued on 31 October 2025 by the State Administration for Market Regulation; Standardization Administration of China, and has been in force since 1 May 2026. Classification: ICS 13.100, CCS E 09. This page is published from the official record of the standard held by the Chinese standards administration: the identification, the dates, the classification and the issuing body are taken from there. The clause text, the tables and the numeric limits are in the document itself, which is delivered complete in English translation.

Document preview — GB 46766-2025

National Standard of the People's Republic of China

ICS: 13.100
Classification: E 09

Issued by: State Administration for Market Regulation; Standardization Administration of China

1.Scope1
2 Normative References1
3.Terms and Definitions1
5.General Requirements3
6.Platform Layout4
6.1 General Requirements4
6.2 Wellhead Area4
6.3 Equipment Area4
6.4 Room Area5
6.5 Living Area5
6.6 Other5
7 Platform Structure6
7.1 General Requirements6
7.2 Design Fundamentals6
7.3 Loads and Load Combinations6
7.4 Structural Analysis6
7.5 Structural Design7
7.6 Materials8
7.7 Construction8
7.8 Welding and other connections8
8.1 General Requirements9
8.2 Coating9
8.3 Cathodic protection10
8.4 Internal corrosion protection10
8.5 Corrosion Monitoring and Detection10
9.1 General Requirements10
9.2 Lifting equipment and drilling platform10
9.3 Power System11
9.4 Well Control System11
9.5 Monitoring and control of toxic and harmful gases and combustible gases12
10 Oil and gas production processes12
10.1 General Requirements12
10.2 Safety Protection of Process Equipment and Facilities13
10.3 Other safety protections18
10.4 Process Safety Analysis19
10.5 Thermal insulation and heat tracing19
10.6 Cold insulation and antifreeze19
11 Process piping19
11.1 General Requirements19
11.2 Piping Layout19
11.3 Piping Design20
11.4 Piping Installation20
11.5 Thermal insulation and heat tracing20
11.6 Safety devices and signs20
12 Mechanical equipment and piping systems20
12.1 General Requirements20
12.2 Diesel engine21
12.3 Gas Turbine22
12.4 Compressor22
12.5 Pump23
12.6 Boiler23
12.7 Pressure Vessels23
12.8 Piping system24
12.9 Crane 25 13 HVAC27
13.1 General Requirements27
13.2 Ventilation requirements for hazardous areas27
14 Electrical Engineering27
14.1 General Requirements27
14.2 Main Power Supply System28
14.3 Emergency Power Supply System29
14.4 Power Distribution System30
14.5 Lighting System31
14.6 Electric heat tracing systems and electric heating equipment31
14.7 Cable31
14.8 Grounding, lightning protection, and interference prevention measures32
14.9 Electrical equipment in hazardous areas32
15 Instrumentation and Control33
15.1 General Requirements33
15.2 Alarm33
15.3 Wellhead Safety Control System34
15.4 Emergency Shutdown System35
15.5 Fire and Combustible/Toxic Gas Detection and Alarm System36
15.6 HIPPS36
15.7 Control System Test Requirements37
15.8 Unmanned operation37
15.9 Control cable37
15.10 Power Supply37
15.11 Grounding37
16 Residential Area37
16.1 General Requirements37
16.2 Residential Rooms38
16.3 Restaurant38
16.4 Kitchen38
16.5 Medical Rooms38
16.6 Recreation Room38
16.7 Equipment Room38
16.8 Passageways and entrances/exits38
17 Fireproof structure39
17.1 Fire compartmentation rating39
17.2 Fire resistance integrity40
17.3 Protection of living quarters, service areas and control stations40
17.4 Load-bearing structure42
17.5 Fire Prevention and Firefighting Layout Diagram42
17.6 Hazard Zone Delineation42
17.7 Passive fire protection42
18 Firefighters42
18.1 General Requirements42
18.2 Fire protection system configuration42
18.3 Fire water system43
18.4 Gas Fire Suppression System44
18.5 Foam Fire Extinguishing System44
18.6 Fine water mist fire suppression system44
18.7 Helicopter Deck Fire Suppression System44
18.8 Firefighting equipment44
18.9 Unattended Platform45
19 Lifesaving and Escape45
19.1 General Requirements45
19.2 Lifeboat Equipment46
19.3 Rescue Boat46
19.4 Inflatable life raft47
19.5 lifebuoy47
19.6 Life jackets48
19.7 Life jacket48
19.8 Rope Throwing Equipment48
19.9 Distress Signal48
19.10 First Aid Facilities49
19.11 Escape Equipment49
19.12 Personal protective equipment and devices49
19.13 Escape Route49
19.14 Boarding assembly area50
19.15 Temporary Shelter50
20 Navigational aids and signals50
20.1 General Requirements50
20.2 Technical Requirements50
20.3 Explosion-proof52
21.1 General Requirements53
21.2 Configuration53
21.3 Technical Requirements54
21.4 Power Supply55
21.5 antenna55
21.6 Cables and grounding55
57 References60

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part

1.Structure and Drafting Rules of Standardization Documents". Drafting. Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents. This document was proposed and is under the jurisdiction of the Ministry of Emergency Management of the People's Republic of China. Safety Specifications for Offshore Oil and Gas Fixed Platforms

1 Scope

This document specifies the requirements for offshore oil and gas fixed platforms (hereinafter referred to as "platforms") regarding platform layout, platform structure, corrosion protection, modular drilling rigs, or well workover. Machinery, oil and gas production processes, process piping, mechanical equipment and piping systems, HVAC, electrical, instrumentation and control, living quarters, fire-resistant structures, fire protection, lifesaving and... The safety technical requirements for the design of escape routes, navigational aids and signals, and communications are described, along with the corresponding verification methods. This document applies to the fixing platforms for newly built, renovated, or expanded steel jacket supports.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included. For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. This document. GB (/T) 3836 (all parts) Explosive Atmospheres

GB 12158 General requirements for the prevention of electrostatic discharge accidents

GB/T 14549 Power Quality - Harmonics in Public Power Grids

GB 17380 Regulations on Navigational Aids to Structures and Buildings in Chinese Sea Areas

GB/T 20972 (all parts) Materials for use in hydrogen sulfide-containing environments during oil and gas extraction in the oil and gas industry

GB/T 25444.2 Electrical installations for mobile and fixed offshore facilities - Part

3 Terms and Definitions

The following terms and definitions apply to this document.

3.1 Offshore oil fixed platforms During offshore oil extraction, the superstructure and facilities are supported by fixed steel jackets and piles.

3.2 unmanned platform Platforms without living facilities, unattended and without on-site operations during normal production (excluding trestle bridges connected to manned platforms). (Connected platform). [Source: GB 40554.2-2025, 3.2]

3.3 platform group Combinations of two or more platforms connected by a trestle.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 64 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 20972 · GB/T 25444.2

Similar standards

GB 12142-2007|GB 12142-2025|GB 12367-2025|GB 12434-2008|GB 12710-2024

Editions of GB 46766

Edition	Title	Revision	Status
GB 46766-2025	Safety specification for offshore oil & gas fixed platform	current edition	Current

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