Classification of Fires and Fire Extinguishers

The fire classification system is designed to simplify the selection of firefighting techniques and equipment. 

The five types of fire extinguishers most commonly found in the chemical processing industry, and their range of effectiveness, are as follows  

Carbon dioxide (CO2) extinguishers are effective on class B and C fires because they cool and displace oxygen. 

Foam fire extinguishers are used to control flammable liquid fires. The foam forms an effective barrier between the flammable liquid and the oxygen needed for combustion. Foam extinguishers are effective on class A and B fires. 

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