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Carbon Dioxide Extinguishers

The Carbon Dioxide (CO2) extinguisher is recommended for use in electronic environments and is suitable for Class 'E' electrical hazard fires. Carbon Dioxide fire extinguishers also have limited capabilities for extinguishing small, indoor Class 'B' flammable liquid and class 'A' fires. Available in three sizes.

Wet Chemical Extinguishers
Wet Chemical extinguishers utilise an aqueous solution discharged in a fine spray to the surface of Class F fires.
The agent reacts with the burning oil, or fat, forming a ‘blanket' which extinguishes the flame by creating a saionifying action and changing the burning liquid into a soap like substance. Once used, as the solution is usually alkaline, it is recommended the surface be cleaned and all residue removed within a reasonable time period.

 

Dry Chemical Powder Extinguishers
Dry Chemical Powder fire extinguishers (DCP's) are the most widely used fire extinguishers, suitable for use on many types of fires. The compact nature of these fire extinguishers, ranging from the 0.9kg domestic model up to the 9kg industrial model, enables them to be utilised in numerous applications.

 

Foam Extinguishers
These extinguishers contain a concentrate mixed with water, which produces foam when discharged. Foam extinguishers are effective against Class A & B fires involving paper, textiles, wood, plastics, rubber, petrol, oil and paints. The foam provides a blanket covering when utilised on flammable liquid or carbonaceous fires assisting with the exclusion of oxygen and thus reducing the ability of fuel to continue burning.

 

Water Extinguishers
A very efficient and cost effective method to combat certain types of fires, the normal capacity of this type of fire extinguisher is 9 litres. Water acts to reduce the temperature of the burning fuel so it is below its ignition point.

Water extinguishers are efficient and cost effective against Class A fires involving paper, textiles, wood, plastics and rubber.

Water acts to reduce the fuel, which is burning, to below the ignition temperature. Fire extinguisher identification and location signs are also available.

 

Fire Extinguisher Selection and Utility

Fire extinguishers generally are designed for one or more classes. Commonly available are A (water), BC (carbon dioxide), and ABC (dry powder).

 

The Australian markings are:

 

Type

pre-1997

current

Water

Solid red

Foam

Solid blue

Red with a blue band

Powder

Red with a white band

Carbon dioxide

Red with a black band

Vapourising liquid (non halon)

Red with a yellow band

Halon

Solid yellow

 

Wet chemical

Solid oatmeal

Red with an oatmeal band