8.1 PRINCIPAL EXTINGUISHING AGENTS
8.1.1 Foam. ... a) Protein foam. ... b) Aqueous Film Forming Foam (AFFF). ... c) Fluoroprotein foam (conventional). ... d) Film forming fluoroprotein (FFFP) foams. ... e) Synthetic foams. ...
AFFF has been used so widely because it is an exceptionally effective fire-fighting solution for high-hazard flammable liquid fires. When applied to a hazard, AFFF produces an aqueous film that spreads across the surface of the fire to extinguish the flame. This film is what gives AFFF its name, and it works by suppressing flammable liquid vapor, effectively suffocating the fire hazard. The foam component further suppresses fires by keeping hot fuel from reigniting.
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