The criteria for judging the hidden dangers of major production safety accidents in the industry and trade industry are as follows:

Article 1. In order to accurately judge and eliminate the hidden dangers of major production safety accidents in the industry and trade industry (hereinafter referred to as the hidden dangers of major accidents), this standard is formulated in accordance with the Law of the People's Republic of China on Work Safety and other laws and administrative regulations.

article 2. this standard is applicable to the judgment of major accident hidden dangers of enterprises in the industries of metallurgy, nonferrous metals, building materials, machinery, light industry, textiles, tobacco, commerce and trade, etc. if there are other provisions on the judgment standard of major accident hidden dangers in the industries involving dangerous chemicals, fire fighting (fire), gas and special equipment, such provisions shall apply.

article 3. major accident hazards in industry and trade are divided into general major accident hazards and industrial major accident hazards. General major accidents include three areas: those with dust explosion danger, those with liquid ammonia refrigeration and those with poisoning risks such as hydrogen sulfide and carbon monoxide, which are applicable to all relevant industrial and trade enterprises; The hidden dangers of major accidents in industries are divided into seven industries, such as metallurgy, nonferrous metals, building materials, machinery, light industry, textiles and tobacco, which are only applicable to the corresponding industrial and trade enterprises.

article 4, major accident hidden danger in "areas with dust explosion danger".

1. The dangerous place of dust explosion is set in a multi-storey building (structure) with non-frame structure, or there are places where staff quarters, conference rooms, offices, lounges and other people gather.

2. Different kinds of combustible dust, combustible dust and combustible gas and other media that are likely to aggravate the explosion risk * * * use a set of dust removal system, or different buildings or different fire zones * * * use a set of dust removal system or dust removal system for interconnection.

3. The dry dust removal system fails to take any explosion prevention and control measures such as explosion venting, inerting and explosion suppression.

4. When the dust removal system of metal dust such as aluminum and magnesium adopts positive pressure dust removal, or other combustible dust removal systems adopt positive pressure dust blowing, measures such as spark detection and elimination are not taken to prevent ignition sources.

5. The dust removal system adopts gravity settling chamber for dust removal, or adopts dry tunnel structure as dust removal air duct.

6. The dry dust removal system for metal dust such as aluminum and magnesium and wood dust is not provided with an air lock and ash unloading device.

7. The electrical equipment in the dust explosion hazardous places, such as dust collectors and dust collection bins, which are divided into 2 zones, does not meet the explosion-proof requirements.

8. There is no device for removing iron, stone and other impurities before the process equipment which is easy to generate mechanical ignition sources such as crushing, grinding and granulation, or there is no spark detection and elimination device in the sanding process which is easy to generate mechanical ignition sources in wood products processing enterprises.

9. The collection and storage places of metal dust such as aluminum and magnesium that spontaneously ignite when wet have not taken fire and explosion-proof measures such as ventilation, waterproof, moisture-proof, hydrogen concentration monitoring and alarm.

1. The dust cleaning system has not been formulated and implemented, or there is serious dust on the job site.

article 5, "the field where liquid ammonia is used for refrigeration" is a major accident hidden danger.

1. The air conditioning system in the production places such as packaging, division and product sorting adopts ammonia direct evaporation refrigeration.

2. The quick freezing device is not set in a separate workshop, or the number of workers in the workshop of the quick freezing device exceeds 9.