Sub Module 7.1: Classes of Fire

Classes Of Fire

 


Fire results from the chemical reaction that occurs when oxygen combines rapidly with fuel to produce heat, (and light). Three essentials of this process form the ‘Fire Triangle’. A fire requires three components to burn, and the removal of any one of these components will extinguish the fire. The requirements of the three components, forming the ‘Fire Triangle’, are:

  • Fuel: a combustible material, which may be a solid, liquid or gas
  • Oxygen: in sufficient volume to support the process of combustion
  • Heat: of sufficient intensity to raise the temperature of the fuel to its ignition (or kindling) point.

Classes of Fire

There are a number of types of portable fire extinguishers. Each type of extinguisher may be rated for one or more classes of fire. In some cases, particular extinguishers are not only considered ineffective against certain classes of fire, they can be dangerous if used in those circumstances. The classes of fire in  European system are:

Class A: Ordinary Combustibles
Class B: Flammable and combustible liquids
Class C: Flammable gases
Class D: Combustible metals
Class E: Electrically energized equipment
Class F: Cooking oils and fats

Let's take this quiz on Classes of Fire.


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