Released on March 31, 2009, implemented on December 1, 2009

　　Foreword

　　The full technical content of this standard is mandatory.

　　This standard replaces GB18218-2000 "Significant Hazard Source Identification".

　　The main changes of this standard compared with GB18218-2000 are as follows:

　　--- Change the standard name to "Identification of Major Hazardous Sources of Hazardous Chemicals";

　　--- Include the processing technology and storage activities involving hazardous chemicals in the mining industry;

　　--- Inapplicability has increased offshore oil and gas exploration activities;

　　--- Revised some terms and definitions;

　　--- Revised the scope of hazardous chemicals;

　　--- revised the critical mass of hazardous chemicals;

　　--- Cancel the difference between the critical amount between the production site and the storage area.

　　This standard was proposed by the State Administration of Work Safety.

　　This standard is under the jurisdiction of the National Safety Production Standardization Technical Committee Chemical Safety Standardization Subcommittee (TC288/SC3).

　　This standard is drafted by: China Academy of Safety Production Science.

　　The unit participated in the drafting unit: Sinopec Qingdao Safety Engineering Research Institute.

　　The main drafters of this standard: Wu Zongzhi, Wei Lijun, Liu Wei, Du Yingquan, Shi Lichen, Gao Jindong, Sun Meng, Yu Lijian, Zhang Haifeng, Yang Chunsun, Peng Xiangyu.

　　This standard was first published in 2000 and this revision is the first revision.

　　Identification of major hazard sources of hazardous chemicals

　　1 Scope

　　This standard specifies the basis and method for identifying major hazard sources for hazardous chemicals.

　　This standard applies to all enterprises or organizations such as the production, use, storage and operation of hazardous chemicals.

　　This standard does not apply to:

　　a) Nuclear facilities and plants for the processing of radioactive materials, except for those facilities that deal with non-radioactive materials in such facilities and factories;

　　b) military installations;

　　c) the mining industry, with the exception of processing techniques and storage activities involving hazardous chemicals;

　　d) transportation of hazardous chemicals;

　　e) Offshore oil and gas exploration activities.

　　2 Normative references

　　The terms in the following documents become the terms of this standard by reference to this standard. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard. However, parties to agreements based on this standard are encouraged to study whether the latest versions of these documents are available. . For undated references, the latest edition applies to this standard.

　　GB12268 Dangerous Goods Name List

　　GB20592 Classification of chemicals, warning labels and warning instructions Safety regulations Acute toxicity

　　3 Terms and definitions: The following terms and definitions apply to this standard.

　　3.1 Hazardous chemicals: Chemicals that are flammable, explosive, toxic, or harmful and cause harm or damage to people, facilities, and the environment.

　　3.2 Unit: A (set) production facility, facility or site, or several (sets) of production facilities, facilities or sites that are both a production and business unit with an edge distance of less than 500 m.

　　3.3 Critical mass: For a quantity specified for a certain type or class of hazardous chemicals, if the quantity of hazardous chemicals in the unit equals or exceeds the quantity, the unit is identified as a significant source of hazard.

　　3.4 Hazardous chemicals Major hazard sources: Long-term or temporary production, processing, use or storage of hazardous chemicals, and the number of hazardous chemicals equals or exceeds the critical amount of units.

　　4 Identification of major hazard sources of hazardous chemicals

　　4.1 Identification basis

　　4.1.1 Identification of hazardous chemicals Major hazards are based on the hazard characteristics and quantity of hazardous chemicals. See Tables 1 and 2 for details.

　　4.1.2 The method for determining the critical mass of hazardous chemicals is as follows: