What are the methods of use and precautions for fire extinguishers?
When <1> uses carbon dioxide fire extinguisher, the nozzle should be ejected from the side of the fire source at the side, and the reaction of the jet should be kept at a certain angle, so that carbon dioxide can quickly cover the fire source. For outdoor use, it should be sprayed in the upwind direction; used indoors and in small spaces; after fire fighting, the operator should leave quickly to prevent suffocation.<2> fire extinguishers should be placed to prevent moisture and sun with a convenient place in the protected goods near, ventilation and dry; fire extinguishers each connecting parts shall not be loose, the nozzle cover cannot fall off; fire extinguishers should be checked according to the prescribed time after use should be refillable.
When the fire extinguisher will be mentioned or back to the fire, from the burning at about 5m, put down the fire extinguisher, pull out the safety pin, one hand holding the microphone with the handle, the other hand hold the valve opening and closing pressure. No spray hose carbon dioxide extinguishers should be put online to 70o~90o amplifier. When in use, can not directly use the hand to hold the outer surface of the cylinder or the metal connecting pipe, to prevent hand frostbite. To extinguish combustible liquid fire, as has been flowing like combustion, it will bubble youyuanerjin injection, the foam completely covered the burning surface; such as the burning of the container, the inner wall of the container should be at the bubble, the bubble flowing along the inner wall surface, gradually covering fire. Not directly at the liquid injection, so as to avoid the impact of the jet, but will break up or out of the burning liquid container, expand the scope of combustion. In fighting solid material fires, the jet should be directed at the most violent place. As the effective injection distance is shortened, the user shall gradually approach the combustion zone and begin to spray the foam on the burning material until it is extinguished. When used, the fire extinguisher should always remain in an inverted state, otherwise it will break the jet.
When the fire, portable fire extinguishers or shoulder quickly rushed to the scene, from the burning at about 5m, put down the fire extinguisher. If outdoors, should be chosen in the upwind direction of injection. One should hold the spray gun in one hand and lift the lifting ring at the other. When the dry powder is ejected, fire rapidly at the root of the flame. Fire extinguisher if the built-in gas cylinders or storage type, the operator should be open to pull the pin, then hold the front end of the nozzle jet hose roots, the other hand will open the pressure under pressure, open fire extinguishers extinguishing.Fire extinguishing of flammable and combustible liquids by dry fire extinguisher should be done with quasi flame root fire. If the liquid fire that is put out is flowing and burned, aim at the root of the flame and shoot near and far, and fire until the fire is extinguished
Many types of fire extinguishers, according to the movement can be divided into portable and transportable; according to the power source driving fire extinguishing agent can be divided into gas cylinders, pressure storage, chemical reaction type; according to the filling of the fire extinguishing agent is also divided into foam, dry powder, alkyl halides, carbon dioxide, water, acid and alkali etc.
