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).
To properly extinguish a fire using a foam fire extinguisher, do the following: Method 1 – when a liquid fire has been contained to a specific area : Pull the …
Foam fire extinguishers and how they are use – HSEWatch
Uses of foam fire extinguisher: Fires involving flammable solids, such as paper, wood, and textiles (‘class A’ fires) Fires involving some flammable liquids, such as petrol, diesel, and paint (‘class B’ fires) Fires involving electrical appliances IF the extinguisher has passed the 35kv conductivity …
A fire extinguisher foam is a low-density fluid made up of small air-filled water bubbles. Essentially, it has three ingredients mixed in specific proportions: water, foam, and air. Foam extinguishers carry a cream-colored …
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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 does a AFFF fire extinguisher work?
AFFF works by smothering the fire and sealing in the flammable vapours. This prevents the fire re-igniting. It also allows foam fire extinguishers to put out flammable liquid fires, by creating a barrier between the liquid’s surface and the flames.
What is a liquid fire extinguisher and how does it work?
It also allows foam fire extinguishers to put out flammable liquid fires, by creating a barrier between the liquid’s surface and the flames.
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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