Fire Extinguishers

A range of fire extinguishing systems for your home or business.

Fire extinguishers provide effective fire protection for controlling and extinguishing small fires.These appliances are mainly used in emergency situations where a sudden breakout of fire needs to be controlled immediately. These fire extinguishers cannot be used for controlling fire that has spread or gained in size within the facility. Out-of-control fires require better fire suppression capabilities, which cannot be provided through fire extinguishers. Fire that has reached the ceiling or burnt down a complete room needs to be tackled meticulously and the use of a fire extinguisher will not help.

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Type of Fire Extinguishers

Some of the commonly used fire extinguishers include water, dry chemical, and carbon dioxide type.
The water extinguisher also known as the air pressurized water type is mainly used for fires with class
A classification only. These extinguishers cannot be used to control fire of greasy or chemical nature.
The main working principle of water extinguishers is the use of water pressurized and stored using
oxygen. However, it is necessary to use such extinguishers only when the fire is due to non-
combustible materials.

The dry chemical type fire extinguishers can be used for fires of A, B, or C Classification. These extinguishers contain foam while being pressurized with nitrogen and stored inside the extinguisher cylinder. Sometimes the extinguishers contain powder as the fire suppression agent. For fighting fires of the ABC classification, the fire extinguisher used is of the dry chemical type. However, this type of chemical leaves a mild corrosive residue immediately after application and needs to be cleaned to prevent damage to other materials especially electrical appliances present in that room.

These dry chemical extinguishers have an advantage over the carbon dioxide counterparts since they avoid leaving any kind of flammable substance while extinguishing the fire. Therefore, the likelihood of re-ignition does not arise at all. The carbon dioxide based extinguishers are mainly used to fight B and C class of fire. However, they cannot fight class A fire since they are unable to displace sufficient quantity of oxygen from the fire thereby re-igniting it.

Fire Extinguisher classification

The fire extinguishers are classified based on its ability to fight different types of fire, which are classified under categories such as A, B, and C. The classification changes from one country to another and the extinguishers are labeled in a similar manner. However, the Class A extinguishers is mainly used to contain fire due to ordinary combustible substances. Such fires can be due to substances such as wood, paper, plastics, or cardboard. The Class B fire extinguishers are used to control fires ragging from flammable or combustible materials. These materials include grease, kerosene, gasoline, and oil. These extinguishers can be used to control high intensity fires but not the large ones.

The Class C fire is caused due to short-circuiting or overheating of the electrical appliances. The fire extinguishers with water cannot be used on such fires since they will only damage the appliances and increase the risk of electric shock. However, since the Class C fires occur in appliances, the extinguishers used to suppress the fire do not have the requisite numerical rating. The extinguishing agent used to suppress the Class C fire is of non-conductive nature.

Thanks the Techstore Team

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