1. Water, foam, ammonium phosphate dry powder, and haloalkyl fire extinguishers should be used to fight Class A fires, that is, solid burning fires. Class A fire: refers to solid material fire. This substance is often organic in nature and generally produces glowing embers when burned. Such as wood, cotton, wool, linen, paper fire, etc.
2. Dry powder, foam, haloalkane, and carbon dioxide fire extinguishers should be used to extinguish Class B liquid fires and meltable solid material fires (it is worth noting here that chemical foam fire extinguishers cannot extinguish Class B polar soluble solvent fires, because chemical foam and When organic solvents are touched, the foam will be quickly absorbed, causing the foam to disappear quickly, so that it cannot extinguish the fire. Alcohols, aldehydes, ketones, ethers, esters, etc. are all polar solvents). Class B fire: refers to liquid fires and meltable solid material fires. Such as gasoline, kerosene, crude oil, methanol, ethanol, asphalt, etc.
3. To fight Class C fires, that is, gas burning fires, dry powder, haloalkane, and carbon dioxide fire extinguishers should be used. Class C fire: refers to gas fire. Such as coal gas, natural gas, methane, ethane, etc.
4. To put out Class D fires, that is, metal burning fires, as far as our country is concerned, there is no standardized fire extinguisher product. Foreign Class D fire extinguishers mainly include powdered graphite fire extinguishers and dry powder fire extinguishers special for metal fires. If the domestic production of fire extinguishers and fire extinguishing agent beads has not yet been finalized, dry sand or cast iron foam can be used to extinguish fires. Class D fire: refers to metal fire. Such as potassium, sodium, magnesium, titanium, aluminum-magnesium alloy, etc.
5. Phosphoric acid salt dry powder and haloalkane type fire extinguishers should be used to fight Class E fires. Class E fire: refers to a fire involving electrically charged objects. Such as generator rooms, transformer rooms, distribution rooms, instrument rooms and electronic computer rooms, etc., where the electrical equipment cannot be cut off in time or should not be powered off when burning.
6. Fight Class F fires, that is, fires involving cooking materials (animal and vegetable oils and fats) in cooking utensils. When extinguishing fire, avoid using water, foam and water-containing substances. Use suffocation extinguishing method to isolate oxygen to extinguish the fire.
