What type of fire extinguisher is recommended for use on combustible metals?

The recommended fire extinguisher for use on combustible metals is the Class D extinguisher. Combustible metals, such as magnesium, titanium, and sodium, present unique challenges during a fire because they can react violently with water and certain other suppressants. Class D extinguishers are specifically designed to extinguish fires involving combustible metals by using dry powder agents that smother the fire and absorb heat, without causing a dangerous reaction. These agents do not allow for combustion and can safely extinguish the flames generated by burning metals, which is crucial in preventing further firefighting hazards.

Understanding the unique properties and behavior of combustible metals helps in identifying why other extinguishers, such as those for ordinary combustible materials, flammable liquids, or energized electrical equipment, are not appropriate for this type of fire. Class D extinguishers provide the safest and most effective means to tackle fires involving combustible metals.