GB11984-2024
Technical specification for chlorine safety of chemical industrial enterprises
化工企业氯气安全技术规范
GB 11984-2024 is a current mandatory Chinese national standard for Technical specification for chlorine safety of chemical industrial enterprises. It appears in the Chemicals compliance cluster with a product safety focus and has an implementation date of Aug 1, 2025.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard specifies the safety requirements for the production, storage, and emergency response of chlorine gas in chemical industrial enterprises. It applies to all chemical enterprises involved in the production and use of chlorine gas, including liquid chlorine. Overseas engineers must ensure their facilities in China comply with these mandatory requirements. The standard is not applicable to non-chemical industrial uses of chlorine.
Technical requirements
The standard outlines basic requirements covering design, management, and equipment facilities. It mandates that new, reconstructed, or expanded projects must undergo quantitative risk evaluation according to GB/T 37243 and GB 36894. Key management rules include limiting personnel numbers in hazardous areas and requiring the use of portable alarm instruments and personal protective equipment compliant with GB 39800.2. Enterprises must ensure no more than 3 personnel enter chlorine production units simultaneously. For production safety, the standard details requirements for chlorine electrolysis, treatment, liquefaction, and vaporization. It mandates the use of Safety Instrumented Systems (SIS) and Hazard and Operability Studies (HAZOP) to determine Safety Integrity Levels (SIL). Liquid chlorine vaporization must adopt a full vaporization process, explicitly prohibiting the use of kettle-type vaporizers. Additionally, it sets strict limits on wet chlorine gas temperatures and nitrogen trichloride emissions. Regarding storage safety, the standard dictates strict guidelines for liquid chlorine storage tanks and cylinders. Liquid chlorine storage tank farms must be equipped with SIS for emergency shutdown and independent accident chlorine absorption devices. The storage coefficient of tanks must not exceed 0.8. It also details the handling, storage, and pre-filling evacuation requirements for liquid chlorine cylinders.
Testing methods
The standard specifies verification methods by requiring the inspection of project construction documents, risk assessment reports, training records, and equipment facility setups. For production safety, it requires checking HAZOP and LOPA analysis reports, SIL grading and verification reports, and piping and instrument diagrams. Storage safety compliance is verified through SIS configuration and major hazard source assessment reports. Emergency response compliance is confirmed by reviewing emergency plans, drill records, and rescue material inventories.
FAQs
What products or facilities are regulated under GB 11984-2024?
It applies to all chemical industrial enterprises in China that produce or use chlorine gas, including liquid chlorine, covering production, storage, and emergency response.
What are the main updates in GB 11984-2024 compared to the 2008 version?
Key updates include new restrictions on personnel numbers in hazardous areas, requirements for abnormal condition handling, mandatory use of full vaporization processes for liquid chlorine, and the mandatory installation of SIS in liquid chlorine storage tank farms.
Does GB 11984-2024 mandate the use of a Safety Instrumented System (SIS)?
Yes, liquid chlorine storage tank farms constituting major hazard sources must be equipped with an independent SIS to achieve emergency shutdown functions, separate from the Basic Process Control System (BPCS).
The summary above provides a high-level overview of GB 11984-2024. To ensure complete compliance for your facilities or products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 11984-2024 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Safety
- CCS
- G 09
- ICS
- 13.300
- Competent department
- Ministry of Emergency Management
- Technical committee
- National Technical Committee on Work Safety of Standardization Administration of China
Relationships
Replaces:GB 11984-2008