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A carbon dioxide (CO2) fire extinguisher is a portable, active fire protection device that works by expelling carbon dioxide onto a fire. It works by displacing the oxygen the fire relies upon to continue burning, and it is primarily used to extinguish fires in which the source of the fuel is a flammable liquid or gas
Classes of fire
There are six classes of fire: Class A, Class B, Class C, Class D, ‘Electrical’, and Class F. -
- Class A fires - combustible materials: caused by flammable solids, such as wood, paper, and fabric
- Class B fires - flammable liquids: such as petrol, turpentine or paint
- Class C fires - flammable gases: like hydrogen, butane or methane
- Class D fires - combustible metals: chemicals such as magnesium, aluminium or potassium
- Electrical fires - electrical equipment: once the electrical item is removed, the fire changes class
- Class F fires - cooking oils: typically a chip-pan fire
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