Ratings & Classes

FIRE RATINGS

Fire Extinguishers are given ratings for one or more of the above classes of fire with a numerical prefix which determines the strength of fire the extinguisher should be capable of dealing with. The table below gives a quick approximate guide to extinguishers and fire ratings.

Extinguisher	Rating	Extinguisher	Rating
Water 9 litre	21A	Carbon Dioxide 2kg	34B
Water plus additive 3 litre	21A	Dry Powder 2kg	13A 70B C
Water plus additive 6 litre	13A	Dry Powder 4kg	21A 113B C
AFFF 9 litre	21A 144B	Dry Powder 6kg	34A 183B C
AFFF 6 litre	21A 144B	Dry Powder 9Kg	43A 233B C
AFFF 3 litre	13A 55B	Wet Chemical 6 litre	8A 40F
AFFF 2 litre	8A 55B	Dry Powder 9Kg	13A 75F

EXTINGUISHER CLASSES

Symbol	Class	Use
	Class A	SOLIDS such as paper, wood, plastic etc.
	Class B	FLAMMABLE LIQUIDS such as paraffin, petrol, oil etc.
	Class C	FLAMMABLE GASES such as propane, butane, methane etc.
	Class D	METALS such as aluminium, magnesium, titanium etc.
	Electrical	Fires involving ELECTRICAL APPARATUS.
	Class F	Cooking OIL & FAT etc