What classification is given to fires involving combustible metals?

Fires involving combustible metals are classified as Class D fires. This classification is specifically designated for fires that involve flammable metals such as magnesium, titanium, potassium, and sodium. These metals burn at extremely high temperatures and require special extinguishing methods that are different from those used for other classes of fires.

Class D fire extinguishing agents typically include dry powder agents that can smother the fire without reacting with the burning metal, as water or foam, which might be suitable for other types of fires, can exacerbate a Class D fire by causing a violent reaction. Understanding this classification is vital for proper fire safety training and effective response to such incidents.

The other classifications (Class A, B, and C) deal with ordinary combustibles, flammable liquids, and energized electrical equipment, respectively, and do not encompass the unique challenges presented by combustible metals.