Which class of fire involves combustible metals?

The classification of fires is based on the type of material that is burning, and Class D fires specifically involve combustible metals. These metals include magnesium, titanium, potassium, sodium, and others that can ignite and burn fiercely. The unique characteristics of combustible metals necessitate special extinguishing methods, as traditional extinguishing agents can often make the situation worse. For example, water should never be used on a Class D fire, as it can react violently with certain metals.

Understanding the nature of Class D fires is crucial for safety in environments like laboratories, where combustible metals might be present. Proper training in handling and extinguishing these fires is essential to prevent serious accidents. The other classes pertain to different materials: Class A fires involve ordinary combustibles, Class B fires involve flammable liquids, and Class C fires involve electrical equipment. This distinction underscores the importance of recognizing and responding appropriately to various fire types based on their fuel sources.