Saturday 4 June 2016

METHODS OF EXTINGUISHING FIRES

Method
Aim
Means
Remove Oxygen
Smother the fire.
Introduces a barrier between the fuel and the oxygen, e.g. a lid, mineral fibre blanket, foam, sand or carbon dioxide.
Remove Heat
Reduce the temperature of the fuel (and surroundings) to below the ignition temperature.
Uses water, etc. Some of the heat is transferred to the water and some is used up during the conversion of water to steam.
Remove Fuel
Shut off the supply of flammable gases or liquids.
Uses of valves, etc.


There are two main types of fire extinguishing systems: 
Fixed Installations, e.g. sprinkler, foam spray and gas flood systems; 
Portable Extinguishers, e.g. hand held or on a wheeled trolley.

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