Theory of Extinguishing a Fire
A fire will continue to burn as long as there is FUEL, OXYGEN and HEAT available. Fire extinguishment is achieved by the removal of either the FUEL, OXYGEN or HEAT or by the interruption of the chemical chain reaction. This is achieved by:
Removal of the unburnt material
This includes turning off the gas
Preventing the oxygen (air) from combining with the fuel
This is how a fire blanket works
Reducing the temperature of the burning material to below its ignition point.
Adding water to a Class A (solid combustible) fire does this
INTERRUPTION OF THE CHAIN REACTION
Some extinguishing mediums (eg. Dry chemical powder) accomplish this action and at the same time smother the fire
For Greater Detail On The Theories Of Fire And Its Extinguishment See:
'THEORIES OF FIRE & FIRE EXTINGUISHMENT'
For further advice ring the Community Safety & Resilience Department 8204 3611, Country callers 1300 737 637
visit our website www.mfs.sa.gov.au
or call in to 99 Wakefield Street, Adelaide during business hours.