Why Should We Use Foam in Liquid Fires?

15.02.2024

Why Should We Use Foam in Liquid Fires?

Many extinguishing agents are effective on flammable liquids. However, foam is the only agent that traps vapor and provides visible safety.

• Covering the surface of unignited flammable liquid with foam prevents the fire from starting.
• The water component in the foam cools the fuel surface.
• It prevents flammable vapors from escaping the fuel surface. Trapping vapors prevents them from finding an ignition source.
• It removes oxygen from the fuel vapors, preventing the formation of a flammable mixture.
• Foam can provide protection from flammable liquids for fire and rescue personnel in emergencies.
• Until safety measures are taken, foam can prevent danger and ensure post-fire safety.
• It emulsifies the fuel.
• Foams used today are of the mechanical type. Before use, they must be proportioned (mixed with water) and aerated. Four elements are required to produce quality foam:
• Foam concentrate
• Water
• Air
• Mechanical mixing

If any of these elements are missing or not properly proportioned, the result is low-quality foam.