Which type of extinguisher is suitable for use on combustible metal fires?

Combustible metal fires, such as those involving magnesium, titanium, or sodium, require specialized extinguishing agents due to the unique properties of these materials. The Class D extinguisher is specifically designed for this purpose.

Class D extinguishing agents are composed of dry powders that are effective on fires involving combustible metals. These agents work by smothering the fire and interrupting the chemical reaction that is sustaining the combustion, making them suitable for use on fires that cannot be extinguished by water or conventional methods.

Water-based extinguishers can react violently with metals like sodium, while Class B extinguishers, which are designed for flammable liquids and gases, are not effective on combustible metals. Dry chemical extinguishers may be useful in some situations involving flammable liquids but do not adequately address the specific challenges posed by combustible metals. Thus, a Class D extinguisher is essential for safely and effectively extinguishing fires involving combustible metals.