AFFF is suitable for extinguishing which class of fires?

Aqueous Film-Forming Foam (AFFF) is specifically designed to combat Class B fires, which involve flammable liquids such as gasoline, oil, and other hydrocarbons. The unique properties of AFFF allow it to spread across the surface of these burning liquids, forming a film that helps suppress vapors and cool the flames.

Additionally, AFFF can also be effective for Class A fires, which involve ordinary combustible materials like wood, paper, and textiles. When AFFF is applied to Class A materials, it can help to saturate and cool the burning fuel, reducing the risk of re-ignition.

The answer reflects the versatility of AFFF in handling both Class A and Class B fire scenarios, making it a valuable tool in fire suppression strategy. It is important to note that while AFFF is beneficial for these classes, it is not appropriate for Class C fires involving energized electrical equipment or Class D fires involving combustible metals, which require specialized agents.