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Fire extinguisher application guide

What are the classes of fire?

Fires are classified into six groups: A, B, C, D, F and Electrical.

Class A are the fires involving solid materials such as wood, paper, textiles and other
combustible materials.
Class B are the fires of flammable liquids such as petrol’s and spirits.
Class C are the fires involving gases.
Class D are the fires involving burning metals.
Electrical are the fires of live electrical apparatus.
Class F are the fires involving cooking oils such as in deep-fat fryers.

Layer 1
Red

Water fire extinguishers take a red label. This type of fire extinguisher is most commonly used for Class A fires (those caused by flammable solids like wood or paper).

Cream

Foam fire extinguishers and our MultiCHEM range display a cream label. They’re most commonly used on Class B fires (started by flammable liquids). However, as they’re water-based, they’ll also work on Class A fires.

Blue

Dry powder fire extinguishers display a blue label. These extinguishers are also known as ABC extinguishers because of their versatility to help tackle Class A, B and C fires.

Black

CO2 extinguishers feature a black label. These fire extinguishers are suitable for Class B fires (flammable liquid) but are also recommended for electrical fires thanks to the fact it’s non-damaging to electrical equipment.

Yellow

Wet chemical extinguishers feature a bright yellow label. This type of extinguisher is specifically designed for use on Class F fires (cooking oils and fats).

The grid below shows what type of fuels are involved in each class of fire, along with a key to which class fire different fire extinguishers cover

 
EXTINGUISHER AGENT COLOUR ID WOOD, PAPER,
TEXTILES & OTHER
CARBONACEOUS
MATERIALS
FLAMMABLE LIQUIDS,
PETROLS & SPIRITS
FLAMMABLE GASES
(PROPANE, BUTANE)
FIRES INVOLVING
BURNING METALS
FIRES CAUSED BY
AN ELECTRICAL
FAULT WHERE ELECTRIC
CURRENT MAY
BE PRESENT
COOKING OILS & FATS
(OLIVE OIL, LARD)
MULTICHEM  
WATER  
FOAM  
POWDER  
M28/L2  
CO2  
WET CHEMICAL  

This guide is for reference only and therefore should not be treated as professional advice. Always seek expert advice from a fire professional relating to your specific circumstances.

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