The usage methods of various common fire extinguishers

Fire extinguishers are used for extinguishing fires. Learning and becoming familiar with the usage of various common fire extinguishers can help us solve problems with ease when facing sudden fire accidents. The following are the usage methods of various common fire extinguishers for reference.

1: Lift type dry powder fire extinguisher: Lift the fire extinguisher upside down twice to the fire extinguishing site, unplug the safety plug, hold the nozzle with one hand and aim it at the root of the flame, and press the pressure handle with the other hand. When extinguishing a fire, it should be disposed of at once; When using outdoors, one should stand at the upper air vent of the fire source, sweep horizontally from near to far, push forward, and prevent flames from flying back.

2: Foam extinguisher: the extinguishing liquid of foam extinguisher is composed of aluminum sulfate, sodium bicarbonate and liquorice. When putting out a fire, put the foam extinguisher upside down, and the foam can be ejected to cover the fire to extinguish the fire. Suitable for extinguishing fires in barrels of oil, pipelines, and on the ground. Not suitable for fires in electrical equipment and precision metal products.

3: Carbon dioxide fire extinguisher: Carbon dioxide is a non-conductive gas with a higher density than air, and is liquid under high pressure inside a steel cylinder. When extinguishing a fire, simply pull the switch and carbon dioxide will be sprayed onto the ignited object in an airflow state, isolating the air and extinguishing the flame. Suitable for small area fires in precision instruments, electrical equipment, and oil laboratories. When carbon dioxide changes from liquid to gas, it absorbs a large amount of heat and has an extremely low temperature (up to -80 ℃), so it is important to avoid frostbite. Meanwhile, although carbon dioxide is non-toxic, it has a suffocating effect and should be avoided as much as possible.

4: Portable 1211 fire extinguisher: First remove the safety pin, then open the pressure handle with one hand, and hold the handle of the horn spray bucket with the other hand. Hold the open pressure handle tightly to spray. At present, the country is gradually restricting the use of halogenated alkanes, mainly because they cause pollution to the atmosphere and are harmful to human health. Carbon dioxide fire extinguishers are gradually replacing 1211 fire extinguishers, using the same method as 1211 fire extinguishers. However, when using carbon dioxide, it is necessary to be careful not to hold the nozzle or touch the mouth to prevent frostbite.

5: 35kg wheeled dry powder fire extinguisher: operated by two people, one person takes off the spray gun, unfolds the hose, and then holds the trigger by hand; Another person pulls out the safety pin of the opening mechanism and quickly opens the opening mechanism of the fire extinguisher.

6: Carbon tetrachloride fire extinguisher: After gasification, carbon tetrachloride is a colorless, transparent, non-conductive, and denser gas than air. When extinguishing a fire, invert the body, turn the nozzle downwards, and unscrew the hand valve to spray the flame to extinguish it. Suitable for extinguishing fires in electrical equipment and valuable equipment. Carbon tetrachloride is highly toxic, and users should stand at the upper air vent. Indoor, timely ventilation is necessary after extinguishing the fire.