What is the primary use of a Type D fire extinguisher?

A Type D fire extinguisher is specifically designed for use on fires that involve combustible metals. These types of fires often occur in industrial settings where metals like magnesium, titanium, aluminum, and sodium are present. The extinguishing agent in a Type D extinguisher is formulated to smother the flames and react safely with the burning metals without causing a violent reaction.

Understanding the unique properties of combustible metals is crucial because they require special handling and extinguishing measures that differ significantly from those used for ordinary combustibles, flammable liquids, or electrical equipment fires. For example, water and certain other common extinguishing agents can exacerbate fires involving combustible metals, leading to dangerous situations. Thus, the Type D extinguisher is tailored to effectively combat these specific hazards by using dry powder agents that can absorb heat and create a barrier to oxygen.