GB 11984-2024 Technical specification for chlorine safety of chemical industrial enterprises
1 Scope
This document specifies the safety requirements for the production, storage and emergency disposal of chlorine for chemical industrial enterprises that produce or use chlorine.
This document is applicable to chemical industrial enterprises that produce or use chlorine.
Note: For the purpose of this document, the term "chlorine" includes liquid chlorine.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB 2894 Safety signs and guideline for the use
GB 15258 General rules for preparation of precautionary label for industrial chemicals
GB/T 16483 Safety data sheet for chemical products - Content and order of sections
GB/T 17519 Guidance on the compilation of safety data sheet for chemical products
GB/T 29639 Guidelines for enterprises to develop emergency response plan for work place accidents
GB/T 30000.31 Specification for classification and labelling of chemicals - Part 31: Precautionary label for workplace of chemicals
GB 30077 Requirements on emergency rescue materials equipment for hazardous chemical enterprises
GB/T 34525 Safety rules for handling, loading and unloading, storing and using of cylinder
GB 36894 Risk criteria for hazardous chemicals production unit and storage installations
GB/T 37243 Determination method of external safety distance for hazardous chemicals production units and storage installations
GB 39800.2 Specification for the provision of personal protective equipment - Part 2: Oil, chemical and gas industry
GB/T 50493 Standard for design of combustible gas and toxic gas detection and alarm for petrochemical industry
AQ 3051 Technical requirements for automation control system of liquid chlorine cylinder filling
HG/T 4684 Treatment and disposal method for liquid chlorine spill
HG 20571 Code for safety and hygiene design of chemical enterprise
3 Terms, definitions and abbreviations
3.1 Terms and definitions
No terms and definitions are listed in this document.
3.2 Abbreviations
For the purposes of this document, the following abbreviations apply.
BPCS: Basic Process Control System
HAZOP: Hazard and Operability Study
LOPA: Layer of Protection Analysis
ORP: Oxidation-Reduction Potential
SIL: Safety Integrity Level
SIS: Safety Instrumented System
4 Basic requirements
4.1 Design requirements
4.1.1 Chlorine construction projects newly built, rebuilt and expanded shall comply with the local planning layout and industrial access conditions.
4.1.2 For chlorine construction projects newly built, rebuilt and expanded, the external safety protection distance shall be determined with the quantitative risk assessment method given in GB/T 37243, and personal and social risks shall meet the requirements of GB 36894.
4.1.3 Safety facilities of chlorine construction projects newly built, rebuilt and expanded shall be designed, constructed and put into production or use simultaneously with the main part of the project.
4.2 Management requirements
4.2.1 Enterprises shall conduct production safety education and training for employees. Only those rated as quantified in the production safety education and training can take up their posts. The key person(s) in charge of the enterprise and the safety production management personnel shall pass the examination of safety production knowledge and management ability. Special operation personnel shall receive special safety production training.
4.2.2 Following the principle of minimizing people (even to zero) in hazardous jobs, during normal production, the number of personnel entering the same chlorine production installation (plant building) and storage site at the same time shall not exceed 3. In other cases, the number of on-site workers shall be controlled to realize risk monitoring and early warning of personnel gathering based on the personnel positioning system.
4.2.3 The number of operators in the liquid chlorine filling place shall not exceed 2.
4.2.4 To handle abnormal conditions, corresponding measures shall be formulated by following the principles of timely retreating to a safe state, minimizing on-site disposal personnel, comprehensively identifying and analyzing and properly handling risks, effectively preventing accidental release of energy, and conduct unified command based on overall consideration. The number of on-site handling personnel shall not exceed 6.
4.2.5 Fire operations shall not be carried out on the outer walls of chlorine equipment and pipelines not emptied. If fire operations near chlorine equipment and pipelines are necessary, spark prevention and heat insulation measures shall be taken to prevent the temperature of the outer wall of chlorine equipment and pipelines made of carbon steel from exceeding 121°C.
4.2.6 If liquid chlorine transportation is stopped, the pipeline shall not be closed to prevent itself from being full of liquid and closed. When the pressure in the liquid chlorine pipeline is abnormal, safe relief or evacuation measures shall be taken. In case of halt in production or leakage, measures, such as evacuation or nitrogen and dry air replacement, shall be taken, and the pipeline shall be isolated from the liquid chlorine system.
4.2.7 Workers in places with chlorine shall wear portable chlorine alarms and use personal protective equipment meeting the requirements of GB 39800.2.
4.2.8 The material safety data sheet (MSDS) of chlorine shall meet the requirements of GB/T 16483 and GB 17519.
Contents
Foreword III
1 Scope
2 Normative references
3 Terms, definitions and abbreviations
3.1 Terms and definitions
3.2 Abbreviations
4 Basic requirements
4.1 Design requirements
4.2 Management requirements
4.3 Requirements for equipment and facilities
4.4 Verification method
5 Production safety
5.1 General requirements
5.2 Electrolytic chlorine production
5.3 Chlorine treatment and liquefaction
5.4 Liquid chlorine gasification
5.5 Verification method
6 Storage safety
6.1 Liquid chlorine tank
6.2 Liquid chlorine cylinders
6.3 Verification method
7 Emergency disposal
