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TYPES OF FIRE EXTINGUISHER LABELS
Class A Extinguishers will put out fires in ordinary combustibles, such as wood and paper.
Class B Extinguishers should be used on fires involving flammable liquids, such as grease, gasoline, oil, etc.
Class C Extinguishers are suitable for use on electrically energized fires.
Water Fire Extinguishers:The cheapest and most widely used fire extinguishers. Used for Class A fires. Not suitable for Class B (Flammable Liquids) fires, or where electricity is involved.
Foam Fire Extinguishers:More expensive than water, but more versatile. Used for Classes A & B fires. Foam spray extinguishers are not recommended for fires involving electricity, but are safer than water if inadvertently sprayed onto live electrical apparatus.
Dry Powder Fire Extinguishers:Often termed the ‘multi-purpose’ extinguisher, as it can be used on classes A, B & C fires. Best for running liquid fires (Class B). Will efficiently extinguish Class C gas fires, BUT BEWARE, IT CAN BE DANGEROUS TO EXTINGUISH A GAS FIRE WITHOUT FIRST ISOLATING THE GAS SUPPLY. Special powders are available for class D metal fires.
CO2 Fire Extinguishers:Carbon Dioxide is ideal for fires involving electrical apparatus, and will also extinguish class B liquid fires, but has NO POST FIRE SECURITY and the fire could re-ignite.