Which class of fire requires a special type of extinguisher due to its unique hazards?

Class D fires involve combustible metals such as magnesium, titanium, and sodium. These types of fires present unique hazards that make them dangerous and require specialized extinguishing agents. Standard extinguishers, such as those used for Class A and Class B fires, may not be effective and could potentially exacerbate the situation.

For Class D fires, the extinguishing agents are specifically designed to smother the burning metals and prevent oxygen from fueling the fire. Using water or other common extinguishing agents could lead to violent chemical reactions, thus creating even more hazards.

When dealing with Class D materials, fire extinguishers labeled for use on combustible metals are essential, as they ensure safety and effectiveness in controlling such fires.