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2. The use of dry powder, foam, haloalkane, and carbon dioxide fire extinguishers for fighting Class B, ie, liquid fires and meltable solid matter fires (It is worth noting here that chemical foam fire extinguishers cannot destroy Class B polar solvent-soluble fires because chemical foams When the organic solvent is touched, the foam will be quickly absorbed, so that the foam will soon disappear, so that it can not play a role in extinguishing the fire. Alcohols, aldehydes, ketones, ethers, esters, etc. are all polar solvents). Class B fires: Refers to liquid fires and meltable solid matter fires. Such as gasoline, kerosene, crude oil, methanol, ethanol, asphalt and so on.
3. The use of dry powder, haloalkane, and carbon dioxide type fire extinguishers should be used for fires that are used to save Class C fires, ie gas combustion. Category C fire: refers to a gas fire. Such as coal, natural gas, methane, ethane and so on.
4. To fight a Class-D fire that is a metal-fired fire, as far as China is concerned, there are no established fire extinguisher products. Fire extinguishers in Class D abroad mainly include powder-mounted graphite fire extinguishers and metal-fired dry powder fire extinguishers. In the case of domestic fire extinguishers and extinguishing agent beads that have not yet been shaped, dry sand or cast iron foam can be used for extinguishing the fire. Class D fire: refers to a metal fire. Such as potassium, sodium, magnesium, titanium, aluminum-magnesium alloys.
5. The use of phosphoric acid salt dry powder and haloalkane fire extinguisher should be used to save E-type fire. Class E fires: Fires with charged objects. Such as the generator room, transformer room, power distribution room, instrumentation room and electronic computer room, etc. in the burning of electrical equipment can not be timely or not power off charged fire.
6. Extinguishing fires of Class F, ie cooking (animal and vegetable oils) fires inside cooking appliances. Do not use water, foam, and water-containing substances during fire extinguishing. Use asphyxiation fire extinguishing methods to isolate oxygen from fire.
Brief Introduction and Selection of Several Major Categories of Fire Fighting Equipment
1. The type of fire that is used to fight a Class A fire, ie, solid burning, should be water type, foam, dry ammonium phosphate powder, and halogenated fire extinguisher. Class A fire: refers to a solid material fire. This material is often of an organic nature and generally produces burning embers when burned. Such as wood, cotton, wool, hemp, paper fire, etc.