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，即液體火災和熔化固體材料火災，應使用干粉、泡沫、鹵化烷烴和二氧化碳滅火器。這里值得注意的是，化學泡沫滅火器不能撲滅B型極性溶劑火災。由于化學泡沫與有機溶劑接觸，泡沫會被迅速吸收，使泡沫迅速消失。這樣，不能把火撲滅了。醇、醛、酮、醚、酯等是極性溶劑。乙類火災：指液體火災和可熔固體材料火災。如汽油、煤油、原油、甲醇、乙醇、瀝青等。

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、鹵代烷、二氧化碳滅火器撲滅C類火災，即燃氣火災。丙類火災：指瓦斯火災。如煤蒸氣、天然氣、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、撲滅D類火災，即金屬燃燒火災，目前還沒有符合我國國情的定型滅火器產(chǎn)品。國外主要有粉末石墨滅火器和金屬火災專用干粉滅火器。在我國尚未定型滅火器和滅火劑珠時，可用干砂或鑄鐵泡沫滅火。D類火災：指金屬火災。如鉀、鈉、鎂、鈦、鋁鎂合金等。

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級消防選用磷酸銨干粉和鹵代烷滅火器。E類火災：指活物體火災。如發(fā)電機房、變壓器室、配電室、儀表室、電子計算機室等不能及時切斷或燃燒時不宜切斷的電氣設備通電。

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、撲滅F類火，即炊具中的炊事(動植物油)火。在消防中應避免使用水、泡沫和含水物質(zhì)。我們應該用窒息和滅火的方法把氧氣從火中分離出來。

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.