What extinguishing media is best for Class D fires?

Class D fires involve combustible metals, such as magnesium, titanium, and sodium. The best extinguishing media for these types of fires is a dry powder or sand, which works effectively to smother the fire and cool the burning material. These materials interrupt the chemical reaction that supports combustion, which is crucial in class D fire situations because common extinguishing agents such as water can react violently with burning metals, potentially causing explosions or spreading the fire.

Using sand or dry powder not only suppresses the flames but also helps contain the fire by covering the burning metal, thereby reducing the available oxygen. The unique properties of these extinguishing agents make them the safest and most effective choice for managing Class D fires.