Fire class

Fire class refers to a system of categorizing fires based on the type of fuel involved and the necessary extinguishing agents. The classification system is used globally to ensure the correct and most effective methods are used to extinguish different types of fires.

Classification

Fire classes are divided into five main categories: Class A, Class B, Class C, Class D, and Class K (or Class F in the United Kingdom and Australia). Each class represents a different type of fire, based on the materials involved.

Class A

Class A fires involve common combustible materials such as wood, paper, cloth, rubber, and many plastics. These fires are typically extinguished with water or monoammonium phosphate.

Class B

Class B fires involve flammable liquids, such as gasoline, oil, and grease. These fires are typically extinguished with foam, carbon dioxide, or dry chemicals.

Class C

Class C fires involve electrical equipment and are typically extinguished with non-conductive agents, such as carbon dioxide or dry chemicals.

Class D

Class D fires involve combustible metals, such as magnesium, titanium, and sodium. These fires are typically extinguished with dry powder extinguishing agents.

Class K/F

Class K fires (or Class F in the United Kingdom and Australia) involve cooking oils and fats. These fires are typically extinguished with wet chemical extinguishing agents.

Fire Extinguishers

Fire extinguishers are labeled with the classes of fire they can effectively extinguish. For example, an extinguisher labeled "A-B-C" can be used on Class A, B, and C fires.

See Also

• Fire safety
• Fire extinguisher
• Fire prevention