What type of firefighting foam is commonly used for Class B fires?

Aqueous film-forming foam (AFFF) is widely recognized for its effectiveness in suppressing Class B fires, which involve flammable liquids such as gasoline, oil, and other hydrocarbons. AFFF works by forming a thin film on the surface of the burning liquid, which helps to smother the fire by cutting off the oxygen supply and preventing the flammable vapors from escaping. This film also cools the surface and prevents reignition, making AFFF an essential choice for firefighting in various industrial and emergency scenarios. Its ease of application and rapid spreading capabilities allow firefighters to effectively control and extinguish fires quickly, minimizing damage and enhancing safety.

While other types of foam may have specific applications, AFFF remains the most commonly used due to its versatility and reliable performance in managing Class B fires. This makes it a critical component of firefighting operations in environments where flammable liquids are present.