The usage methods of various common fire extinguishers

Fire extinguishers are used for extinguishing fires. Learning and familiarizing ourselves 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 dry powder fire extinguisher: Pull the fire extinguisher upside down twice to the fire extinguishing site, remove the safety bolt, hold the nozzle with one hand and aim it at the root of the flame, and press the handle with the other hand. When extinguishing a fire, it should be discarded once; When used outdoors, one should stand at the upwind of the fire source, sweep from near to far, sweep left and right, and push forward to prevent flames from escaping.

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 floors. Not applicable to 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 turn the switch and carbon dioxide will be sprayed onto the burning object in an airflow state, isolating the air and extinguishing the flame. Suitable for small-scale 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 from inhalation 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. Grip the pressure handle tightly to spray. Currently, the country is gradually restricting the use of halogenated hydrocarbons, mainly because they cause air pollution and are harmful to human health. Carbon dioxide fire extinguishers are gradually replacing 1211 fire extinguishers, and the usage method is the same as that of 1211 fire extinguishers. However, when using carbon dioxide, one must be careful not to hold the nozzle or touch the mouth to prevent frostbite.

5: 35kg trolley type dry powder fire extinguisher: operated by two people, one person takes off the spray gun, unfolds the hose, and then holds the trigger with their hand; The other 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: Carbon tetrachloride vaporizes into a colorless, transparent, non-conductive gas with a higher density than air. When extinguishing the fire, invert the machine body, lower the nozzle, and open the hand valve to spray towards the flame to extinguish it. Suitable for extinguishing fires in electrical equipment and valuable instruments. Carbon tetrachloride is highly toxic, and users should stand on the upwind side. Indoor, ventilation should be carried out promptly after extinguishing the fire.