Also known as: • AFFF foam fire extinguishers. • AFFF fire extinguishers. • Spray foam fire extinguishers. • CREAM coloured label printed on the body stating ‘Foam’. • Should be identified by an extinguisher ID sign fixed nearby – ‘Foam Extinguisher’.
A foam type fire extinguisher works two ways. First the foam deprives the fire of oxygen. This is why It can be used on a Class A fire as well. Secondly as the foam breaks down it forms a film at the surface of the flammable liquid. This …
Foam fire extinguishers and how they are use – HSEWatch
How foam fire extinguishers works: Foam fire extinguishers work in 2 ways. They are mainly water-based and so have the same cooling effect as water extinguishers, putting the fire out by lowering the temperature. They contain ‘Aqueous Film Forming Foam’ (this is why they are also known as AFFF foam extinguishers).
Foam fire extinguishers usually use compressed nitrogen or C02 gas and spray a dry powder or foam mixture. The foam is sent out of the container while swirling and mixing and this produces a large volume of spray. The foam is a mixture of water and chemicals, and the water provides a cooling effect on the fire.
People Also Ask how does foam spray extinguisher put out fire
How do foam fire extinguishers stop flammable liquid fires?
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 the difference between water and foam fire extinguishers?
They are mainly water-based and so have the same cooling effect as water extinguishers, putting the fire out by lowering the temperature. They contain ‘Aqueous Film Forming Foam’ (this is why they are also known as AFFF foam extinguishers).
How do I identify a foam fire extinguisher?
How to identify a foam fire extinguisher: • CREAM coloured label printed on the body stating ‘Foam’ • Should be identified by an extinguisher ID sign fixed nearby – ‘Foam Extinguisher’ Sizes of foam fire extinguisher available:
How do you use a fire extinguisher on a liquid?
Where the liquid on fire is contained, point the extinguisher at the inside edge of the container. If it’s not contained, spray with a gentle, sweeping movement across the TOP of the fire, or against an adjacent surface. This way the foam will drop down and settle on the top of the burning liquid.
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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