1. Fire fighting type a solid combustion fires should be water type, foam type, ammonium phosphate dry powder and halogenated alkane fire extinguishers. Class a fire: refers to solid matter fire. When the ash is burnt, the organic material usually has the property of burning. Such as wood, cotton, wool, hemp, paper, fire, etc.

二、消防B，即液体火灾和熔化固体材料火灾，应使用干粉、泡沫、卤化烷烃和二氧化碳灭火器。这里值得注意的是，化学泡沫灭火器不能扑灭B型极性溶剂火灾。由于化学泡沫与有机溶剂接触，泡沫会被迅速吸收，使泡沫迅速消失。这样，不能把火扑灭了。醇、醛、酮、醚、酯等是极性溶剂。乙类火灾：指液体火灾和可熔固体材料火灾。如汽油、煤油、原油、甲醇、乙醇、沥青等。

Two, fire B, that is, liquid fire and melting solid material fire, should use dry powder, foam, halogenated alkane and carbon dioxide fire extinguisher. It is worth noting that chemical foam extinguishers can not extinguish B type polar solvent fire. Because of the contact between chemical foam and organic solvents, the foam will be absorbed quickly and the foam will disappear quickly. In this way, the fire can't be put out. Alcohol, aldehyde, ketone, ether and ester are polar solvents. Class B fire: refers to liquid fire and fusible solid material fire. Such as gasoline, kerosene, crude oil, methanol, ethanol, asphalt, etc.

三、采用干粉、卤代烷、二氧化碳灭火器扑灭C类火灾，即燃气火灾。丙类火灾：指瓦斯火灾。如煤蒸气、天然气、甲烷、乙烷等。

3、 Use dry powder, halogenated alkane and carbon dioxide fire extinguishers to extinguish class C fire, i.e. gas fire. Class C fire: refers to gas fire. Such as coal vapor, natural gas, methane, ethane, etc.

四、扑灭D类火灾，即金属燃烧火灾，目前还没有符合我国国情的定型灭火器产品。国外主要有粉末石墨灭火器和金属火灾专用干粉灭火器。在我国尚未定型灭火器和灭火剂珠时，可用干砂或铸铁泡沫灭火。D类火灾：指金属火灾。如钾、钠、镁、钛、铝镁合金等。

4、 To extinguish class D fire, i.e. metal combustion fire, there is no finalized fire extinguisher product in line with China's national conditions. Abroad, there are mainly powder graphite fire extinguishers and dry powder fire extinguishers for metal fires. Dry sand or cast iron foam can be used to extinguish fire when fire extinguishers and fire extinguishing agents have not been set up in our country. Class D fire: refers to metal fire. Such as potassium, sodium, magnesium, titanium, aluminum magnesium alloy, etc.

五、E级消防选用磷酸铵干粉和卤代烷灭火器。E类火灾：指活物体火灾。如发电机房、变压器室、配电室、仪表室、电子计算机室等不能及时切断或燃烧时不宜切断的电气设备通电。

5、 Ammonium phosphate dry powder and halogenated alkane fire extinguishers are selected for class E fire fighting. Class E fire: refers to the fire of living objects. Such as generator room, transformer room, power distribution room, instrument room, electronic computer room and other electrical equipment that cannot be cut off in time or should not be cut off during combustion.

六、扑灭F类火，即炊具中的炊事(动植物油)火。在消防中应避免使用水、泡沫和含水物质。我们应该用窒息和灭火的方法把氧气从火中分离出来。

6、 Extinguish class F fire, i.e. cooking (animal and vegetable oil) fire in cooking utensils. Water, foam and water bearing substances should be avoided in fire fighting. We should separate oxygen from the fire by suffocating and extinguishing the fire.