GB 46768-2025 Technical specification of work safety in confined spaces English, Anglais, Englisch, Inglés, えいご
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ICS 13.230
CCS H 57
National Standard of the People's Republic of China
GB/T 46768-2025
Technical specification of work safety in confined spaces
有限空间作业安全技术规范
Issue date: 2025-10-31 Implementation date: 2026-05-01
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 References
3 Terms and Definitions
4 Safety Management
5 Safety Technical Requirements Before Operation
6 Safety Technical Requirements During Operation
7 Safety Technical Requirements After Operation
8 Verification Methods
Appendix A (Informative) Example of Confined Space Management Ledger
Appendix B (Informative) Example of Confined Space Operation Safety Risk Notification Board
Appendix C (Informative) Alarm Values of Some Toxic and Harmful Gases
Appendix D (Informative) Example of Confined Space Operation Approval Form
Appendix E (Informative) Example of Gas Detection Record Form
Appendix F (Informative) Example of Confined Space Operation Entry Confirmation Form
Appendix G (Informative) Example of Confined Space Operation Completion Acceptance Form
1 Scope
This document specifies the safety management requirements for confined space operations, as well as the safety technical requirements before, during, and after confined space operations, and describes the corresponding verification methods.
This document applies to confined space operations and their safety management.
This document does not apply to confined space operations and their safety management in hazardous chemical production, operation (with storage) enterprises, chemical and pharmaceutical enterprises, as well as ships.
2 Normative References
The contents of the following documents constitute essential provisions of this document through normative references in this document. Among them, the dated references apply only the version corresponding to the date; the undated references apply the latest version (including all amendments).
GB 2811 Head Protection — Safety Helmets
GB/T 3836.1 Explosive Atmospheres — Part 1: Equipment — General Requirements
GB 6095 Fall Protection — Safety Belts
GB 6220 Respiratory Protection — Long - Tube Respirators
GB 12358 General Technical Requirements for Gas Detection and Alarm Instruments for Working Place Environment
GB 15577 Dust Explosion Safety Regulations
GB 16556 Respiratory Protection — Self - Contained Open - Circuit Compressed Air Respirators
GB 23394 Respiratory Protection — Safety Ropes for Fall Protection
GB/T 29639 Guidelines for the Preparation of Emergency Response Plans for Production Safety Accidents of Business and Operation Units
GB/T 38228 Respiratory Protection — Self - Contained Closed - Circuit Oxygen Escape Respirators
GB 38451 Respiratory Protection — Self - Contained Open - Circuit Compressed Air Escape Respirators
GB 39800.1 Individual Protective Equipment — Part 1: General Provisions
GBZ 2.1 Occupational Exposure Limits for Hazardous Factors in Workplaces — Part 1: Chemical Hazardous Factors
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
Confined Space
A space that is enclosed or partially enclosed, not designed as a fixed workplace, where personnel can enter to work, and is prone to the accumulation of toxic and harmful, flammable and explosive substances, or insufficient oxygen.
3.2
Confined Space Operation
Work carried out by personnel entering a confined space.
3.3
Entry
The act of a person's head or whole body entering a confined space.
3.4
Operation Unit
The unit that enters a confined space to carry out work.
3.5
Contract Awarding Unit
The unit that awards confined space operations.
3.6
Operation Supervisor
The person responsible for organizing and implementing confined space operations at the operation site.
3.7
Attendant
The person who supervises confined space operations outside the confined space.
3.8
Operator
The person who enters a confined space to carry out work.
3.9
Operation Approver
The person responsible for approving confined space operations.
4 Safety Management
4.1 Management Ledger
4.1.1 Units that may have confined spaces should identify the confined spaces within their management areas, establish a confined space management ledger, and update it in a timely manner.
4.1.2 The confined space management ledger should include the name, location, and main hazard factors of the confined spaces. An example of the confined space management ledger is shown in Appendix A.
4.2 Warning Signs
4.2.1 Obvious safety warning signs should be set at the entrance and other prominent positions of confined spaces.
4.2.2 In places where multiple confined spaces are concentrated, a confined space operation safety risk notification board should be set at a prominent position. An example of the confined space operation safety risk notification board is shown in Appendix B.
4.3 Safety Management System
4.3.1 The safety management system of the operation unit should clearly define the responsibilities of the operation approver, operation supervisor, attendant, operator, and emergency rescue personnel, as well as the contents of confined space operation safety training, operation approval, safety protection, and emergency rescue equipment and facility management, and operating procedures.
4.3.2 The safety management system of the contract awarding unit should clearly define the responsibilities of the operation approver and the personnel for safety inspections at the operation site, as well as the contents of confined space operation safety training and contract awarding management.
4.4 Safety Training
4.4.1 The operation unit should conduct confined space operation safety training for the operation approver, operation supervisor, attendant, operator, and emergency rescue personnel of the unit.
4.4.2 The contract awarding unit should conduct confined space operation safety training for the operation approver and the personnel for safety inspections at the operation site of the unit.
