Types of Fire Extinguishers

In the previous article, we discussed the types of fires and burning agents which cause those fires. In the current article, we will discuss the types of Fire Extinguishers and suitability of fire extinguishers against each type of fire.

A well selected weapon is necessary for a soldier to fight against an enemy and if the weapon is not chosen as per the situation, then the situation may become lethal for the soldier. So, for a good soldier, knowledge about the weapons and understand the war situation is necessary, if the soldier wants to emerge out as victorious. The same rule applies in fire fighting as well.

There are five types of Fire Extinguishers commonly available in the market, DCP (Dry Chemical Powder), CO2 (Carbon Dioxide), AFFF (Aqueous Film Forming Foam), Water  and Halotron.

Fire triangle is mixture of three elements, Heat, Fuel and Oxygen and if any one of these elements is removed from the triangle, then the fire can be extinguished. So, it is necessary to choose the right fire extinguisher against a specific type of fire.

Dry Chemical Powder or more commonly known as DCP Fire Extinguishers can be used against A, B and C Types of Fires. Dry Chemical Powder must be ABC type and not BC type. These fire extinguishers extinguish the fire by interrupting the chemical reaction of the fire triangle.

Carbon Dioxide or more commonly known as CO2 Fire Extinguishers are used in Class B and C Fires. CO2 fire extinguishers extinguish the fire by taking away the oxygen element from the fire triangle and also by cooling down the heat element with a very cold discharge.

Aqueous Film Forming Foam or commonly known as AFFF Fire Extinguishers are used in Class A and B Fires. AFFF is highly effective against petrol and volatile liquids, forming smothering seal over the surface and thus eliminates the danger of re-ignition. AFFF Fire extinguishers extinguish the Fire by separating the oxygen element from other elements.

Water Fire Extinguishers are used only in Class A Fire. Water fire extinguishers extinguish the fire by taking away the heat element from the fire triangle.

Halotron Fire Extinguishers are used against Class F or K fire. These fire extinguishers extinguish the fire by removing heat from the fire triangle and prevent re-ignition by creating the barrier between the oxygen and fuel elements.