Standard No.:	GB 46766-2025
English Name:	Safety specification for offshore oil & gas fixed platform
Chinese Name:	海洋石油固定平台安全规范
Professional Classification:	GB    National Standard
Source Content Issued by:	SAMR; SAC
Issued on:	2025-10-31
Implemented on:	2026-5-1
Status:	to be valid
Target Language:	English
File Format:	PDF
Word Count:	35000 words
Translation Price(USD):	1050.0
Delivery:	via email in 1~10 business day

GB 46766-2025 Safety specification for offshore oil & gas fixed platform English, Anglais, Englisch, Inglés, えいご This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered. ICS 13.220.01 CCS C 81 National Standard of the People's Republic of China ‌GB 46766-2025 Safety specification for offshore oil & gas fixed platform 海洋石油固定平台安全规范 Issue date: 2025-10-31 Implementation date: 2026-11-01 Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China the Standardization Administration of the People's Republic of China Contents Preface 1 Scope 2 Normative Referenced Documents 3 Terms and Definitions 4 Abbreviations 5 General Requirements 6 Platform Layout 6.1 General Requirements 6.2 Well - head Area 7 Platform Structure 7.1 General Requirements 7.2 Design Basis 7.3 Loads and Load Combinations 8 Anti - corrosion 8.1 General Requirements 8.2 Coatings 9 Modular Drilling Rig or Workover Rig 9.1 General Requirements 9.5 Toxic and Hazardous Gas, Flammable Gas Monitoring and Prevention and Control 10 Oil and Gas Production Process 10.1 General Requirements 10.2 Process Equipment and Facility Safety Protection 11 Process Piping 12 Mechanical Equipment and Pipe Systems 13 Heating, Ventilation and Air - Conditioning (HVAC) 14 Electrical 15 Instrumentation and Control 16 Living Quarters 17 Fire - resistant Structure 17.1 Fire - separation Rating 17.2 Fire - resistance Integrity 18 Fire - fighting 19 Life - saving and Escape 20 Aids to Navigation and Signals 21 Communication 22 Preparation and Review of Design Documents Annex A (Normative) Fire - resistance Integrity Rating of Bulkheads and Decks Separating Adjacent Spaces References 1 Scope This document specifies the safety technical requirements for design related to platform layout, platform structure, corrosion protection, modular drilling or workover rigs, oil and gas production processes, process pipelines, mechanical equipment and piping systems, HVAC (heating, ventilation, and air conditioning), electrical systems, instrumentation and control, living quarters, fire - resistant structures, fire protection, life - saving and escape, navigational aids and signals, and communications for offshore oil and gas fixed platforms (hereinafter referred to as “platforms”). It also describes the corresponding verification methods. This document applies to newly - built, renovated, and expanded steel jacket - supported fixed platforms. 2 Normative References The contents of the following documents constitute essential provisions of this document. For normative references with a specified date, only the version corresponding to that date applies to this document; for normative references without a specified date, the latest version (including all amendments) applies to this document. GB(/T) 3836 (all parts): Explosive Atmospheres GB 12158: General Requirements for Preventing Static Electricity Accidents GB/T 14549: Power Quality - Harmonics in Public Power Grids GB 17380: Regulations for Navigational Aids of Marine Structures in Chinese Sea Areas GB/T 20972 (all parts): Petroleum and Natural Gas Industries - Materials for Use in Sulfide - Containing Environments During Oil and Gas Production GB/T 25444.2: Mobile and Fixed Offshore Facilities - Electrical Installations - Part 2: System Design GB/T 44310: General Design Code for Offshore Fixed Platforms MH/T 6012: Aviation Obstruction Lights International Convention for the Safety of Life at Sea (SOLAS) Regulations on the Administration of Compulsory Product Certification 3 Terms and Definitions The following terms and definitions apply to this document. 3.1 ‌Offshore Oil & Gas Fixed Platform‌ A platform in the process of offshore oil and gas production, where the upper structure and facilities are supported by fixed steel jackets and piles. 3.2 ‌Unmanned Platform‌ A platform without living facilities, unattended and unoperated on site during normal production (excluding platforms connected to manned platforms via a causeway). [Source: GB 40554.2-2025, 3.2] 3.3 ‌Platform Group‌ A combination of two or more platforms connected by a causeway. 3.4 ‌Total Number of Personnel on Platform‌ The total sum of the number of people who board the platform simultaneously at any time during the platform’s production and operation phase. Note: This includes both accommodated and non - accommodated personnel. 3.5 ‌Hazardous Zone‌ A region where hazardous areas are classified into Zones 0, 1, and 2 based on the expected frequency and duration of explosive gas environments. 3.5.1 ‌Zone 0‌ A region where flammable and explosive gases or vapors persist or are present for a long time continuously under normal operating conditions. 3.5.2 ‌Zone 1‌ A region where flammable and explosive gases or vapors may appear under normal operating conditions; a region where flammable and explosive gases or vapors intermittently appear or leak due to abnormal operating conditions; a region near Zone 0 where no effective positive pressure ventilation measures can block the diffusion of flammable or explosive gases from Zone 0. 3.5.3 ‌Zone 2‌ A region where flammable and explosive gases or vapors do not appear under normal operating conditions; a region where flammable and explosive gases or vapors leak or accumulate due to equipment failure, positive pressure ventilation failure, or other abnormal operating conditions; a region near Zone 1 where no effective positive pressure ventilation measures can block the diffusion of flammable or explosive gases from Zone 1. 3.6 ‌Room Area‌ A region on the platform where rooms such as central control rooms, main switch rooms, main transformer rooms, submersible pump control rooms, emergency generator rooms, emergency switch rooms, battery rooms, gas fire - extinguishing system storage rooms, storage rooms, machine repair rooms, electrical and instrumentation workrooms, and paint rooms are set up according to the platform’s functions and actual production and operation needs. 3.7 ‌Isolation‌ A method of separating enclosed spaces, unit series, process equipment, valves, instruments, etc., using physical barriers during the process of offshore oil and gas production. 3.8 ‌Deluge Sprinkler System‌ An automatic fire - sprinkler system that, upon a fire, is controlled by a fire - automatic alarm system or an execution mechanism to automatically open the deluge alarm valve group and start the fire pump, thus supplying water to open sprinkler heads. 3.9 ‌Operator‌ An enterprise responsible for implementing offshore oil and gas production activities, or an entity responsible for implementing offshore oil and gas production activities as stipulated in a petroleum contract. [Source: GB 40554.1-2021, 3.8] 3.10 ‌Certifying Survey Agency‌ A technical service institution recognized in accordance with relevant regulations, which implements inspections on offshore oil production facilities to ensure compliance with safety production technical conditions. [Source: GB 40554.1-2021, 3.14] 4 Abbreviations The following abbreviations apply to this document. BDV: Blowdown Valve BSL: Burner Safety Low CCUS: Carbon Capture Utilization and Storage