If there are standards, it shall be based on Table 3.1.1 of "Code for Fire Protection Design of Buildings" gb50016-2006.
Category A:
1 Liquids with a flash point less than 28°C.
2 Gases with a lower explosion limit less than 10%.
3 Substances that can decompose themselves at room temperature or can cause rapid spontaneous combustion or explosion when oxidized in the air.
4 Substances that can produce flammable gases and cause combustion or explosion when exposed to water or water vapor in the air at room temperature.
5 It is a strong oxidant that can easily cause combustion or explosion when exposed to acid, heat, impact, friction, catalysis, or flammable inorganic substances such as organic matter or sulfur.
6 Substances that can cause combustion or explosion when impacted, rubbed, or in contact with oxidants or organic matter.
7 Production in closed equipment where the operating temperature is greater than or equal to the auto-ignition point of the substance itself.
Category B:
1 Liquids with a flash point greater than or equal to 28°C but less than 60°C.
2 Gases with a lower explosion limit greater than or equal to 10%.
3 Oxidants that do not belong to Class A.
4 Chemically flammable and hazardous solids that do not belong to Category A.
5 Combustion-supporting gas
6 Floating dust, fibers, and liquid droplets with a flash point greater than or equal to 60°C that can form explosive mixtures with air.
Extended information:
Class D:
1 Processing of non-combustible substances often produces strong radiant heat, sparks or Production of flame.
2 Various productions that use gas, liquid, and solid as fuel or burn gas and liquid for other purposes.
3 The production of using or processing refractory substances at room temperature.
Class E:
Production of non-combustible substances used or processed at room temperature.