![]() If the fire hazard contains a mix of fire classes, it is important to select an extinguisher that can control all of the hazards present. 2 will be helpful in deciding a specific fire extinguisher type selection. Knowing the reason or origin of the fire hazard can be helpful in determining the fire class. To select a fire extinguisher, one needs to identify the fire class. They are suitable for Class A, B, C, and electrical fires and contain dry powder or clean inert gases as the extinguishing agent. Once they detect heat, Automatic fire extinguishers immediately act. They are automatic, and easy to recharge. 2: Quick Reference Fire Extinguisher Types Chart Automatic fire extinguishersĪutomatic fire extinguishers are used to fight transport fires (engine compartments of boats or large vehicles, or in industrial use, such as in generator or computer rooms). 2 provides a quick reference fire extinguisher type chart:įig. They are ideal and widely used for class B and E-type fires. The gas extinguishes the fire by reducing the oxygen levels and impeding the chain reaction. When it is sprayed through the nozzle, the clean agent converts into a non-conductive, safe eco-friendly gas upon contact with the air. The agent in its liquid phase is stored in the cylinder. Clean Agent Fire Extinguishers:Ī clean agent fire extinguisher is a gaseous fire suppression system. Wet chemical fire extinguishers can also be used for class A fires and they carry a yellow label. This soap-like substance prevents re-ignition. They contain a potassium solution that rapidly knocks the flames out, cools the hot oil, and seals the liquid surface with a thick soap-like substance generated by a chemical reaction. Wet chemical extinguishers are highly efficient extinguishers and ideal for fire hazards involving cooking oils and vegetable fats (Type F or type K fire class). CO 2 fire extinguishers carry a black label. CO 2 fire extinguishers can also be used on class B fires involving flammable liquids.Ĭarbon dioxide fire extinguishers blanket the fire by cutting off the air supply which in turn removes oxygen, required for the fire to continue. This is one of the cleanest types of fire extinguishers in commercial use and requires no clean-up after use. Carbon Di-Oxide Fire Extinguishers:Ī carbon dioxide fire extinguisher (CO 2) is ideal for fires involving electrical hazards (Class E). Powder fire extinguishers carry a blue label. So, powder extinguishers should be used as the last resort. Also, powders can create a loss of visibility and breathing problems. However, as they do not cool the fire, there is a possibility of re-ignition. The common powder is mono-ammonium phosphate. Fine chemicals in powder form as extinguishing agents are released by the powder extinguishers to blanket the fire and suffocate it. ![]() It is one of the most common extinguishers in wide use as powder extinguishers can be effectively used on Class A, B, C, and E fires. Powder fire extinguishers are multi-purpose extinguishers with numerous advantages. Foam fire extinguishers carry a cream label. Also, the water in the foam provides a cooling effect to prevent re-ignition. ![]() This blanket prevents the vapors from reaching the air. They blanket the fire with a foam generated when the spray hits the air. However, in many countries, this is not recognized as a separate fire class because once the electric power supply is switched off it can be considered as any of the other five classes.Ĭlass F fire extinguisher: Class F fire extinguishers find their use to extinguish class F fires characterized by fires from cooking oils, vegetable oils, fats, butter, etc.įoam fire extinguishers find their application to put out class A and class B fires. 1: Fire Extinguisher Parts Classes of Fire Extinguisherĭepending on the specific fire types, fire extinguishers are also classified into six groups as listed below:Ĭlass A fire extinguisher: These fire extinguishers are used to put out class A fires characterized by fire from ordinary solid or dust combustibles like wood, paper, textile, plastic, fabric, cardboard, etc.Ĭlass B fire extinguishers: Class B fire extinguishers are used to prevent Class B fire hazards from flammable liquids like grease, gasoline, oil (except cooking oil), paint, etc.Ĭlass C fire extinguisher: Class C fires originating from flammable gases like methane, butane, propane, hydrogen, etc are best handled using class C fire extinguishers.Ĭlass D fire extinguisher: Class D fire extinguishers are widely used to put out fires generated from combustible metals, such as magnesium, sodium, potassium, lithium, titanium, or aluminum.Ĭlass E fire extinguisher: These fire extinguishers are used to extinguish fires that originated from live electrical sources.
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