Scope and use of water-based foam fire extinguisher

The foam fire extinguisher is suitable for extinguishing oil products, grease and other fires. It can not extinguish fires of water-soluble flammable and flammable liquids in the fire, such as alcohol, ester, ether, ketone and other substances; nor can it extinguish live equipment.

When using a foam fire extinguisher, the lifting ring on the upper part of the portable cylinder quickly went to the fire. At this time, care should be taken not to tilt it too much, and not to take it horizontally or upside down, so as not to mix the two agents and spray them out in advance. When the distance to the ignition point is about 10 meters, the cylinder can be turned upside down. Hold the lifting ring with one hand and hold the bottom ring of the cylinder with the other hand, aiming the jet at the burning object. When fighting a flammable liquid fire, if it has burned in a flowing state, spray the foam from far to near to completely cover the surface of the combustion liquid; if burning in the container, the foam should be shot toward the inner wall of the container to make the foam Flowing along the inner wall, gradually covering the fire surface. Avoid direct injection at the liquid surface, so as to avoid the impact of the jet flow, but instead the combustion liquid will be scattered or washed out of the container, expanding the combustion range. When extinguishing solid matter fires, the jet should be directed at the burning point. With the shortening of the effective spraying distance when extinguishing the fire, the user should gradually approach the burning area, and always spray the foam on the burning material until it is extinguished. When in use, the fire extinguisher should always be kept upside down, otherwise the spraying will be interrupted.