Classes Of Fires And Extinguishers

Our today’s Toolbox Talks topic is Classes Of Fires And Extinguishers

American	European/ Australasian	Fuel/Heat source
Class A	Class A	Ordinary combustible materials such as wood, cloth, paper, etc.
Class B	Class B	Flammable liquids such as grease, gasoline, lubricating oils, and other hydrocarbons.
Class B	Class C	Flammable gases
Class C	Class E	Electrical equipment
Class D	Class D	Combustible metals like sodium, magnesium, aluminium, etc. and phosphoric substances.
Class K	Class F	Cooking oil or fat

CLASSES OF FIRES AND EXTINGUISHERS :

Water

Used on class “A” fires. Cools the fire to below ignition temperature. Force will last for 2 minutes and can reach 40 feet distance. Pressure is stored in gas cartridges inside the cylinder.

Dry Chemical Powder

Used on all classes of fires. Stops the chain reaction by smothering. Pressure is generated by Gas cartridges stored inside the cylinder. Its force will last for 2 minutes and can reach 10 – 15 feet.

Foam

Suitable for classes A&B fires. Fire is extinguished by isolating oxygen from fire. Pressure is stored in gas cartridges. Can fight fires upto 20 feet distance and lasts for 2.5 minutes.

Halon

Most suited for electrical fires. Extinguishes the fire by displacing oxygen. Halon cylinders are obsolete now as they contain chloro flouro carbons which are harmful to the environment. So they are being replaced by eco-friendly gases.

CO2

Removes / displaces oxygen. Suitable for classes A, B, C fires. Ideal for electrical fires. Its pressure lasts for 15 seconds only and not suitable for distant fires.

If you want to know that how to use fire extinguisher then check out our article: How to use Fire Extinguisher

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Classes Of Fires And Extinguishers

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