As the foam is sprayed onto the fire, it extinguishes the fire in two ways, 1) it cools the fire, and 2) it smothers the fire, effectively sealing up the fire which …
Foam fire extinguishers work in 2 ways. Firstly, they are mainly water-based and so have the same cooling effect as water extinguishers, putting the fire out by lowering the temperature. Secondly, they contain ‘Aqueous Film Forming Foam’ (this is why they are also known as AFFF foam extinguishers).
What Is a Foam Fire Extinguisher Used For?
Foam fire extinguishers were designed for use on Class A and Class B fires. Class A fires are those lit on solids, such as paper, wood, and furniture. Class B fires are those ignited on flammable liquids, including fuels, solvents, and paint. The only drawback to using this type of extinguisher is that it can be messy. Foam fire extinguishers will leave a residue after use.
A foam based fire extinguisher does obstruct a fire by: Covering the burning surface and cutting off its oxygen supply. Separating the ignited object from the source of the flame and preventing a chain reaction. Cooling all …
People Also Ask what is foam used for in a fire extinguisher
What is a foam fire extinguisher?
Foam fire extinguishers are one of the most common types of fire extinguisher, and are generally used for fires involving flammable solids and liquids. We explain all in our simple guide. Summary: foam fire extinguishers are good, general use extinguishers, suitable for the majority of premises. • AFFF foam fire extinguishers.
What type of fire extinguishers are used for Class A fires?
F oam fire extinguishers are used on Class A and Class B fires. Class A fires are fires from carbon-based solids like paper, wood, or cloth. Class B fires are fires from flammable liquids like petrol, diesel, paraffin, or oil. Usually, foam-based fire extinguishers are most suited to putting out liquid fires like gasoline or diesel.
How do you clean fire extinguisher foam?
To ensure safety while cleaning up fire extinguisher foam, wear gloves, a dust mask, and goggles, and make sure you clean up with a damp cloth or a paper towel.
How do you use a liquid fire extinguisher?
Method 1 – when a liquid fire has been contained to a specific area: Pull the pin, aim extinguisher nozzle at the inside edge of the containment area, pull lever and spray foam slowly, sweeping from one side to the other, ensuring the fire is completely covered and extinguished.
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Fire Safety Training – How to Use a FOAM Fire Extinguisher Video Answer
Reference:
https://www.usfa.fema.gov/
https://en.wikipedia.org/wiki/Fire_extinguisher