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What are the components of foam fire extinguisher and dry powder extinguisher. For what type of fire are these extinguishers used?

Dry Powder Extinguisher (Special Powders)

These specialist powder extinguishers are designed to control fires involving combustible metals such as lithium, magnesium, sodium or aluminium when in the form of swarf or powder.

There are three special powders based on graphite, copper and sodium chloride.

Foam Extinguisher (AFFF)

Fires involving solids and burning liquids, such as paint and petrol but not suitable for chip or fat pan fires. Safe on fires caused by electricity if tested to 35kV (dielectric test) and a 1m safety distance is adhered to.


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