When should a Class B fire extinguisher be used?

A Class B fire extinguisher is specifically designed for use on fires involving flammable liquids, which include substances such as gasoline, oil, paint, and solvents. The extinguishing agents used in Class B extinguishers are effective in smothering these types of fires, preventing the fire from spreading and enabling safe extinguishing.

Understanding the nature of Class B fires helps in recognizing the importance of using the correct type of extinguisher. Fires fueled by flammable liquids can spread rapidly, and using an extinguisher designed for other classes of fires, such as Class A for ordinary combustibles or Class C for electrical equipment, may not effectively address the burning material. Therefore, utilizing a Class B extinguisher is paramount for controlling and extinguishing flammable liquid fires safely and effectively.