Foam Fire Extinguishing System Foam used in fire protection is an aggregate of air-filled bubbles formed from aqueous solutions, and is of lower density than the lightest flammable liquids. It is mainly used to form a coherent floating blanket on flammable and combustible liquids to prevent or extinguish fires by excluding air and cooling the fuel. Foam can be used as a fire prevention, control or extinguishing agent for flammable liquid in tanks or processing areas.

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