This standard specifies the basis and methods for identifying major hazardous sources. This standard applies to enterprises or organizations that produce, use, store and operate hazardous substances. This standard does not apply to: a) nuclear facilities and factories that process radioactive substances, except for the departments in these facilities and factories that process non-radioactive substances; b) military facilities; c) mining; d) transportation of hazardous substances. GB 18218-2000 Identification of Major Hazard Sources GB18218-2000 Standard Download Decompression Password: www.bzxz.net

GB18218-2000
Identification of major hazard sources is an effective means of preventing major industrial accidents. Since the European Community promulgated the "Decree on Major Accident Hazards in Industrial Activities" in 1982, the United States, Canada, India, Thailand and other countries have also issued corresponding standards. In 1996, Australia promulgated the national standard NCO)HSC:1014 (1996) "Control of Major Hazard Sources". The basis for identifying major hazard sources in these laws and regulations or standards is the hazard and critical quantity of the material. This approach is technically reasonable and convenient in use. Considering the connection with relevant foreign standards, this standard adopts the same method. In the pilot work of major hazard source census organized and implemented by the former Ministry of Labor in 1997, a pilot implementation of major hazard source identification was carried out. This standard is proposed on the basis of the above pilot work. This standard is proposed by the Safety Production Bureau of the State Economic and Trade Commission. The drafting units of this standard: Safety Science and Technology Research Center of the State Economic and Trade Commission, Qingdao Safety Engineering Research Institute of Sinopec Corporation.
The main drafters of this standard are Wu Zongzhi, Wang Guangliang, Gao Jindong, Li Yongxing, Chen Zhigang, Liu Xuefeng, Wei Lijun and Jiang Tao. 221
1 Scope
National Standard of the People's Republic of China
Identification of major hazard installations
Identification of major hazard installations This standard specifies the basis and methods for identifying major hazard installations. This standard applies to enterprises or organizations involved in the production, use, storage and operation of hazardous substances. This standard does not apply to:
GB 18218—2000
a) nuclear facilities and factories processing radioactive substances, except for the departments in these facilities and factories that handle non-radioactive substances; b) military facilities;
c) mining industry;
d) transportation of hazardous substances.
2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest versions of the following standards GB12268-1990 List of Dangerous Goods
3 Definitions
This standard adopts the following definitions.
3.1 Hazardous substance A substance or a mixture of several substances that, due to its chemical, physical or toxic properties, has the hazard of easily causing fire, explosion or poisoning.
3.2 Unit
Refers to one (set) of production equipment, facilities or places, or several (sets) of production equipment, facilities or places that belong to the same factory and have an edge distance of less than 500 m2.
3.3 Threshold quantity
Refers to the quantity specified for a certain type or class of hazardous substances. If the quantity of substances in a unit is equal to or exceeds this quantity, the unit is defined as a major hazard source.
3.4 ​​Major accident majoraccident
A major fire, explosion or poison leakage accident that occurs during industrial activities, causing serious harm to on-site personnel or the public, or causing major losses to property, and causing serious pollution to the environment. 3.5 Major hazard installations units that produce, process, transport, use or store hazardous substances for a long time or temporarily, and the amount of hazardous substances is equal to or exceeds the critical amount.
3.6 Work site
Refers to the place where hazardous substances are produced, processed and used, including the intermediate storage tank storage area during the production, processing and use process and the semi-finished product and finished product turnover warehouse. Approved by the State Administration of Quality and Technical Supervision on September 17, 2000 222
Implemented on April 1, 2001

3.7Storage areastore area
GB 18218—2000
A relatively independent area consisting of storage tanks or warehouses specially used for storing hazardous substances. 4 Identification of major hazardous sources
4.1 Basis for identification
The basis for identification of major hazardous sources is the hazardous characteristics of the substance and its quantity. 4.2 Classification of major hazardous sources
Major hazardous sources are divided into two types: major hazardous sources in production sites and major hazardous sources in storage areas. 4.2.1 Major hazardous sources in production sites
Based on the different characteristics of substances, major hazardous sources in production sites are determined by the names of the following four categories of substances (the names are referenced from GB12268-1990 "List of Dangerous Goods" and their critical quantities. a) The names and critical quantities of explosive substances are shown in Table 1. Table 1 Names and critical quantities of explosive substances
Mercury fulminate
Nitroglycerin
Dinitrodiazophenol
Diethylene glycol dinitrate
Substance name
Nitrosaminotetrazene
Barium azide
Lead azide
Lead trinitroresorcinol
Hexanitrodiphenylamine
2,4,6-Trinitrophenol
2,4,6-Trinitrobenzylnitramine
2.4,6-Trinitroaniline
Trinitroanisole
2,4,6-Trinitrobenzoic acid||t t||Dinitrophenol
Cyclotrimethyltrinitramine
2.4.6-Trinitrotoluene
Pentaerythritol tetranitrate
Nitrocellulose
Ammonium nitrate
1,3,5-Trinitrobenzene
2.4,6-Trinitrochlorobenzene
2,4,6-Trinitroresorcinol
Cyclotetramethyltetranitramine
Hexanitro-1,2-phenylethylene
Ethyl nitrate
Production site
Critical quantity·t
Storage area
b) The names and critical quantities of flammable substances are shown in Table 2. GB 18218--2000
Table 2 Names and critical quantities of flammable substances
Liquids with a flash point of 28°C
Liquids with a flash point of 28°C ≤ <60°C
Gases with an explosion limit of ≤10%
Substance name
N-pentane
Naphtha
Cyclopentane
Methyl formate
Ethyl formate
Methyl acetate
Turpentine
2-Butene-1-ol||t t||3-Methyl-1-butanol
Bis(n-)butylene ether
n-Butyl acetate
n-Amyl nitrate
2,4-Pentanedione
Cyclohexylamine
Camphor oil
1,3-Butadiene
Ethylene oxide
Mixture of carbon-dioxide and hydrogen
Petroleum gas
Natural gas
Production site
Critical quantity, t
Storage areabZxz.net
GB 18218--2000
c) The names and critical quantities of active chemical substances are shown in Table 3. Table 3 Names and critical amounts of active chemical substances
Potassium chlorate
Sodium chlorate
Potassium peroxide
Sodium peroxide
Name of substance
Production site
Tertiary butyl peroxyacetate (concentration ≥70%)Tertiary butyl peroxyisobutyrate (concentration ≥80%)Tertiary butyl peroxycis-butenedioate (concentration ≥80%)Tertiary butyl peroxyisopropyl carbonate (concentration ≥80%)Peroxide: diphenyl carbonate (salinity ≥90%)2.2-bis-(tertiary butyl peroxy) alkane (concentration ≥7 0%) 1,1-bis-(tert-butyl peroxide) cyclohexane (concentration ≥ 80%) di-sec-butyl peroxydicarbonate (concentration ≥ 80%) 2,2-dihydropropane (concentration ≥ 30%) di-n-butyl peroxycarbonate (concentration ≥ 80%) 3,3,6,6,9.9-hexamethyl-1,2,4.5-tetrahydrocyclononane methyl ethyl ketone peroxide (concentration ≥ 60%)
isobutyl methyl ketone peroxide (concentration ≥ 60%) peracetic acid (concentration ≥ 60%)
(.di)isobutyryl peroxide (concentration ≥ 50%) peroxide.Diethyl dicarbonate (concentration ≥ 30%) Tert-butyl peroxide pivalate (concentration ≥ 77%) d) The names and critical amounts of toxic substances are shown in Table 4. Table 4 Names and critical amounts of toxic substances
Carbonyl fluoride
Carbon oxide
Sulfur oxide
Trihydrogen sulfide
Carbonyl sulfide
Hydrogen fluoride
Chlorinated
Arsine
Hydrogen antimonide
Phosphide
Hydrogen selenide
Selenium fluoride
Tellurium hexafluoride
Material name
Production site
Critical amount, t
Critical amount, t
Storage area
Hydrogen chloride||t t||Fluorine chloride
Ethylenimine
Carbon disulfide
Nitrogen oxides
Oxygen difluoride
Fluorine trifluoride
Boron trifluoride
Phosphorus trichloride
Phosphorus oxychloride
Sulfur dichloride
Methyl sulfate
Methyl chloroformate
Octafluoroisobutylene
Vinyl chloride
2-Chloro-1,3-butadiene
Trichloroethylene
Hexafluoropropylene
3-Chloropropylene
GB 18218--2000
Table 4 (End)
Substance Name
Toluene-2,4-diisocyanate
Methyl isocyanate
Acrylonitrile
Acetone cyanohydrin
2-Propene-1-ol
Acrolein
3-Aminopropene
Methylbenzene
Xylene
Alkyl lead
Nickel carbonyl
Ethyl Borane
Pentaborane
3-Chloro-1,2-propylene oxide
Carbon tetrachloride
Methyl chloride
Methyl bromide
Chloromethyl methyl ether
Monomethylamine
Dimethylamine
N,N-dimethylformamide
Production site
Critical amount,t
Storage area
4.2.2 Major hazard sources in storage area
GB 18218--2000
The method of determining major hazardous sources in storage areas is basically the same as that of major hazardous sources in production sites, except that the process conditions are relatively stable and the critical value is relatively large. The specific values ​​are shown in Tables 1 to 4. 4.3 Identification indicators of major hazardous sources
If the amount of hazardous substances in a unit is equal to or exceeds the critical amount specified in Tables 1, 2, 3 and 4, it is defined as a major hazardous source. The amount of hazardous substances in a unit is divided into the following two situations according to the number of types of substances handled: 4.3.1 If the hazardous substance in a unit is a single variety, the amount of this substance is the total amount of hazardous substances in the unit. If it is equal to or exceeds the corresponding critical amount, it is defined as a major hazardous source. 4.3.2 When there are multiple types of hazardous substances in a unit, the calculation is based on formula (1). If formula (1) is satisfied, it is considered a major hazard source: +%
&+device++
Where ·q1.2.q.—
The actual amount of each hazardous substance, t.
QQ2·Q, the critical amount of the production site or storage area corresponding to each hazardous substance, t. ·(1)
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