What type of fire does Class B extinguishers combat?

Class B extinguishers are specifically designed to combat fires that involve flammable liquids. This category of fire includes substances like gasoline, oil, paint, and solvents, which can easily ignite and cause rapid spread of flames. The agent used in Class B extinguishers works by creating a barrier between the fuel and the oxygen in the air, effectively extinguishing the fire.

Understanding the classifications of extinguishers is critical for proper fire safety and response. While other types of fires, such as those involving ordinary combustibles or electrical sources, require different extinguishing agents, Class B extinguishers uniquely target flammable liquid incidents. This distinction is vital for ensuring the right extinguisher is deployed in an emergency, as using an incorrect type can exacerbate the fire or render the extinguisher ineffective.