Which class of fire specifically involves flammable liquids and gases?

The classification of fires is vital for understanding the appropriate suppression methods and materials needed to combat them. Class B fires specifically involve flammable liquids and gases, such as gasoline, oil, paints, and certain types of solvents. These materials can ignite and burn in a manner distinct from other classes of fire, requiring specific extinguishing agents that can effectively smother the flames or disperse the vapors.

The reason Class B fires are distinct is that they do not leave behind solid materials that are left over from burning, such as those found in Class A fires, which involve ordinary combustibles like wood, paper, and cloth. Class B fires can also pose unique hazards due to the volatility of the liquids and gases involved, making them particularly dangerous in certain environments. Understanding this classification allows firefighters to select the right type of extinguisher, such as foam or dry chemical agents, to extinguish the flames safely and effectively.