There are many types of fire-fighting equipment, which can be divided into: portable and trolley-type; the power source of driving fire-extinguishing agent can be divided into: gas cylinder type, storage pressure type, chemical reaction type; Extinguishing agents can be further divided into: foam, dry powder, halogenated alkane, carbon dioxide, acid and alkali, water and so on.
Fire extinguisher maintenance
Fire extinguisher adapts to fire and how to use it
Portable foam fire extinguisher adapts to fire and how to use it
Scope of application
It is suitable for the fire of general Class B fires, such as oil products, greases, etc. It can also be applied to Class A fires, but it cannot save fires of water-soluble flammable and flammable liquids such as alcohols, esters, ethers and ketones in Class B fires. Such as material fires; it is also impossible to save live equipment and Class C and Class D fires.
How to use: The lifting ring on the upper part of the cylinder can be quickly moved to the fire. At this time, care should be taken not to make the fire extinguisher excessively tilted, and not to be taken horizontally or upside down, so as to prevent the two agents from mixing and ejecting in advance. When the distance is about 10 meters from the fire point, the cylinder can be turned upside down, one hand grips the lifting ring, and the other hand holds the bottom ring of the cylinder, aiming the jet at the burning object. When a flammable liquid fire is extinguished, if it has been burned in a flowing state, the foam is sprayed from near to far so that the foam completely covers the surface of the combustion liquid; if it is burned in a container, the foam should be directed toward the inner wall of the container to make the foam Flowing along the inner wall, gradually covering the surface of the fire. Do not directly align with the liquid level spray to avoid the impact of the jet, instead of flushing or flushing the burning liquid out of the container to expand the combustion range. When fighting a solid material fire, the jet should be directed at the most violent place. As the effective spray distance is shortened during the fire, the user should gradually approach the combustion zone and always spray the foam on the combustion product until it is extinguished. When in use, the fire extinguisher should always be in an inverted state, otherwise the spray will be interrupted.
Foam fire extinguishers should be stored in a dry, cool, ventilated and convenient place. Do not be near high temperature or exposed to prevent carbonation from decomposing. In winter, antifreeze measures should be taken to prevent freezing; dust should be wiped off frequently. Unblock the nozzle to keep it open.
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