According to the standard, it has become GB30000.2~GB30000.5, GB30000.7~GB30000.16, GB30000.18. The classification of hazardous chemicals is mainly based on the Standards for Classification and Labelling of Chemicals. 

 

 

The old version of the unit is divided into 500m range, the new version solves this problem, and it is divided into production unit and storage unit respectively, which is more reasonable. Appendix A gives the flow chart of major hazard identification.  

 

 

The actual amount of hazardous chemicals that have been disputed before is determined by the existing quantity, the facility limit or the designed maximum. The new version clarifies that the actual amount of hazardous chemicals is determined according to the maximum design; in addition, the dangerous chemical mixture is specified. Treatment: If the mixture is in the same hazard category as its pure substance, it is considered pure and calculated as a whole; if the mixture does not belong to the same hazard category as its pure substance, the critical mass should be considered in the new hazard category.

 

 

The new edition integrates the “Hybrid Provisions for the Supervision and Management of Major Hazardous Sources of Hazardous Chemicals (2015 Revision)”, in which the toxic gas β correction coefficient varies, and the exposed personnel a correction factor, major hazard source and R value The correspondence has not changed.