A: Commonly used fire fighting equipment and its performance are as follows: (1) Sand. Yellow sand is packed in a sand box or sand bag. When it is on fire, it can be extinguished by throwing it on the fire. It is suitable for all kinds of burning that cannot be extinguished with water, especially the burning of organic matter. However, the situation is not good for the situation of fierce fire and large burning area. (2). Water is a commonly used fire extinguishing agent, but it is generally not advisable to use water to extinguish a fire in a chemical laboratory unless water is determined to be water soluble or there is no other hazard to water. (3) Carbon dioxide fire extinguishers. The fire extinguisher cylinder is filled with compressed carbon dioxide, the cylinder mouth has a handle switch, and the switch is connected with a high pressure rubber tube and a flared spray tube. When using, pull out the pin under the handlebar switch, press the handlebar, and ignite the horn to the fire field to inject carbon dioxide, so that the fire field is isolated from the air, the effect is faster, and it can be used for electrical appliances, organic solvents and Valuable instruments are on fire and other places. (4) foam fire extinguisher. Similar to carbon dioxide fire extinguishers, the fire extinguishing agent for the fire extinguisher is made of NaHCO3 and aluminum sulfate solution, and is filled with a foaming agent. When the fire extinguisher is turned over, a CO2 and aluminum hydroxide foam direct fire field is generated. These foams will burn like a felt. The body is wrapped and the fire is extinguished. The effect of foam fire extinguishing is stronger than that of carbon dioxide. It is suitable for most occasions except for electric fire. (5) Carbon tetrachloride fire extinguishers. Carbon tetrachloride has a low boiling point and can be rapidly vaporized after being sprayed onto the surface of the combustion product to become a flame retardant gas, which encloses the combustion product and extinguishes it. The advantage of this kind of fire extinguisher is that it can extinguish the fire caused by the current, and does not damage the electric instrument and the precision instrument; the disadvantage is that the steam is poisonous, especially the more toxic phosgene may be generated, so it is better not to use it in places where it is not ventilated. (6) Fire extinguisher. Dry powder fire extinguishers are also a general-purpose fire extinguisher. The main component of the powder in the fire extinguisher barrel is a salt such as NaHCO3, and an appropriate amount of lubricant and moisture-proofing agent are added. Dry powder fire extinguishers combine the advantages of foam, carbon dioxide and carbon tetraoxide fire extinguishers, which are suitable for the initial fire of oil, flammable gases, instrumentation and water burning. Gearbox Assembly,Automobile Gearbox,Transmission Gearbox,Manual Gearbox ShaoXing Change Auto Synchronizer Ring Co.,Ltd , https://www.sxcjautoparts.com
What are the commonly used fire extinguishing equipments and what are their performances?