Class B fires involve fuels such as:

Class B fires are specifically categorized as those that involve flammable liquids, gases, and greases. These types of materials can produce vapors that are ignitable, thus creating a risk of fire when exposed to a spark or flame. Common examples include gasoline, oil, paint, and solvents. Firefighting efforts for Class B fires typically require specific methods and agents, such as foam or dry chemical extinguishers that can effectively suppress the fire by creating a barrier between the fuel and the oxygen.

Understanding the classification of fires is crucial for first responders and rescue technicians, as each class requires a tailored approach to extinguishment. For instance, other classes of fires involve different types of materials: Class A fires involve ordinary combustibles (like paper and wood), Class C fires pertain to energized electrical equipment, and Class D fires involve combustible metals (like magnesium and sodium). Each requires distinct strategies and extinguishing agents, which highlights the importance of recognizing the fuel types involved in a fire scenario.