Classification of fire extinguishers and their respective methods of use

[ Pacific Security Network News ]
In many important public places, hospitals, warehouses, schools, etc., there are fire extinguishers, so the following small series to explain to you is about the classification of fire extinguishers and their respective methods of use.
A hand-held dry powder fire extinguisher (2kg 3kg 4Kg 5kg 8kg)
Extract the fire extinguisher upside down twice to the fire extinguishing site, unplug the safety pin, hold the nozzle in one hand and aim at the root of the flame, and press the pressure handle with one hand. When extinguishing fire, it should be abandoned once; when using it outdoors, it should stand at the upwind of the fire source, from near to far, sweeping left and right, and pushing forward to prevent the flame from returning.
Two cart dry powder fire extinguisher (35kg)
Two people operate, one removes the spray gun, unfolds the hose, and then holds the trigger by hand; the other pulls out the safety pin of the opening mechanism and quickly opens the opening mechanism of the fire extinguisher.
Three carbon dioxide fire extinguisher
Carbon dioxide fire extinguishers can save Class C fires and live fires. Carbon dioxide is a non-conductive gas with a higher density than air and a liquid at high pressure inside the cylinder. When extinguishing a fire, simply turn the switch, and the carbon dioxide is sprayed on the fire object in a state of airflow to isolate the air and extinguish the flame. Suitable for small-area fires in precision instruments, electrical equipment, and oil testing laboratories. When carbon dioxide changes from a liquid state to a gaseous state, it absorbs a lot of heat, and the temperature is extremely low (up to -80 ° C), and frostbite should be avoided. At the same time, carbon dioxide is toxic and should be avoided as much as possible.
Four foam fire extinguisher
The fire extinguishing fluid of the foam fire extinguisher consists of aluminum sulfate, sodium hydrogencarbonate and liquorice. When the fire is extinguished, the foam fire extinguisher is turned upside down, and the foam can be sprayed out to cover the fire to achieve the purpose of fire extinguishing. Suitable for extinguishing fires in barreled oil, pipelines and floors. Not suitable for fires in electrical equipment and precision metal products.
5. Carbon tetrachloride fire extinguisher
After gasification of carbon tetrachloride, it is a gas that is colorless, transparent, non-conductive, and denser than air. When extinguishing the fire, turn the fuselage upside down, the nozzle down, and open the hand valve to spray it to the flame to extinguish it. Suitable for extinguishing fires in electrical equipment and valuable equipment. Carbon tetrachloride is very toxic, and users should stand on the upper air outlet. Indoors, ventilation should be carried out in time. If you have any other questions, please contact our well-known fire equipment suppliers. Such as Beijing Zhongdacheng Fire Equipment Factory, and fire equipment maintenance center.

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