When a dry powder fire extinguisher is used to extinguish flammable and flammable liquids, fire should be directed at the main part of the fire. If the liquid fire that is being extinguished burns, it should be directed at the root of the fire from near to far, and shoot it from side to side until the flame is completely extinguished. If the flammable liquid is combusted in the container, the user should aim at the root of the fire and shake it so that the flow of sprayed powder covers the entire surface of the opening of the container; when the flame is driven out of the container, the user should continue to spray until the flame is completely extinguished. . When flammable liquids are fired in a fire-fighting container, care should be taken not to direct the nozzles directly at the liquid surface to prevent the impact of the jets from spilling flammable liquids to expand the fire and cause difficulty in extinguishing the fire. If the flammable liquid is burned in the metal container for a long time, the wall temperature of the container is higher than the self-ignition point of the flammable liquid. This can easily cause the phenomenon of re-ignition after fire extinguishing. If used together with a foam fire extinguisher, the fire can be extinguished. Better results.
When using a dry powder fire extinguisher to fight a solid flammable substance, fire should be directed at the place where the combustion is most violent, and fire should be taken up and down. If conditions permit, the user can use the fire extinguisher to spray along the four sides of the combustion, so that the dry powder fire extinguishing agent evenly sprayed on the surface of the combustion until the flame is completely extinguished.