Carbon dioxide extinguishes work by displacing oxygen, or taking away the oxygen element of the fire triangle. … CO2s may be ineffective at extinguishing Class A fires because they may not be able to displace enough oxygen to successfully put the fire out.
When should you not use a CO2 fire extinguisher?
Dangers: CO2 extinguishers should not be used on fires involving solid materials, such as paper, wood and fabric, and also are not suitable for use on flammable gases. How it works: The CO2 works by cutting off the fire’s oxygen supply. This then smothers it and, as it does so, extinguishes the flames.
What do CO2 extinguishers do?
CO2 fire extinguishers are mainly aimed at electrical fires but are also suitable for Class B liquid fires and are used in different ways depending on the type of fire they are being used on. Do not use CO2 extinguishers in small rooms as CO2 gas is poisonous at only 4% concentration and can kill at just 8%.
Which is a disadvantage of CO2 extinguishers?
Disadvantages Of Carbon Dioxide Extinguishers
As CO2 works by displacing the oxygen around the fire, it is not suitable for outdoor use, or in environments exposed to windy conditions. CO2 is a high pressured extinguisher. Using it on class A fires or class F fires could cause the fire to spread.
What is the difference between ABC and CO2 fire extinguisher?
CO2s are designed for Class B and C (flammable liquid and electrical) fires only. Carbon Dioxide is a non-flammable gas that extinguishes fire by displacing oxygen, or taking away the oxygen element of the fire triangle.
Why should you not touch the horn of a carbon dioxide extinguisher?
Do not touch the horn on a CO2 extinguisher, it gets very cold and can damage the skin. Squeeze: Squeeze the handle to release the extinguishing agent.
How many CO2 extinguishers do I need?
All premises with electrical equipment must have at least 2kg CO2 extinguishers. Where there is 415 volt rated equipment, then 5kg CO2 extinguishers are required.
How much does a CO2 fire extinguisher cost?
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