甲类厂房1. 闪点小于 28℃的液体2. 爆炸下限小于 10%的气体3

Group A plant <br>liquid 1. The flash point of less than 28 ℃ <br>2. less than 10% of the lower explosive limit of the gas <br>3 or can be self-decomposition in the air can cause rapid oxidation of spontaneous combustion or explosive substance at normal temperature <br>by the air or water at room temperature 4 effect of water vapor, to produce combustible gas and cause a fire or explosion substance <br>5. the case of acid, heat, impact, friction, and the case of catalytic flammable organic or inorganic substances like sulfur, easily cause a fire or explosion strong oxidizer <br>6 . shock, friction, or with an oxidizing agent, when in contact with organic materials can cause a fire or explosion <br>7. the operating temperature is greater than equal to the device in a closed production itself ignition point substance

Class A plant<br>1. Liquid with flash point smaller than 28 degrees C<br>2. Gas with a lower explosion limit of less than 10%<br>3. Substances that can decompose themselves or oxidize in the air at room temperature can cause rapid spontaneous combustion or explosion<br>4. Substances that are affected by water or airborne vapors at room temperature, producing flammable gases and causing combustion or explosion<br>5. Strong oxidants that are highly susceptible to combustion or explosion in the event of acid, heat, impact, friction, catalysis and flammable inorganic substances such as organic matter or sulfur<br>6. Substances that can cause combustion or explosion when hit, rubbed or in contact with oxidants or organic matter<br>7. Production of self-ignition points where the operating temperature is greater than or equal to the substance itself in an airtight device

Class a workshop<br>1. Liquid with flash point less than 28 ℃<br>2. Gas with lower explosion limit less than 10%<br>3. Materials that can decompose by themselves or oxidize in the air under normal temperature and can cause rapid spontaneous combustion or explosion<br>4. Substances that can produce combustible gas and cause combustion or explosion due to the action of water vapor in water or air under normal temperature<br>5. Strong oxidant which is easy to cause combustion or explosion in case of acid, heat, impact, friction, catalysis, organic matter or sulfur and other flammable inorganic substances<br>6. Substances that can cause combustion or explosion when they are impacted, rubbed or contacted with oxidants and organics<br>7. Production with the operating temperature greater than or equal to the spontaneous ignition point of the substance itself in the closed equipment<br>