What is the specific requirement for extinguishing Class D fires?

Class D fires involve flammable metals, such as magnesium, titanium, and sodium. The specific requirement for extinguishing these types of fires is the use of special agents designed specifically for the type of metal involved. These agents are typically dry powder compounds that do not react with the burning metal, effectively smothering the flame and preventing oxygen from reaching the fuel. The use of general extinguishing agents such as water or foam is ineffective or even dangerous for Class D fires, as they can react violently with the burning metals, potentially exacerbating the situation and leading to larger flames or explosions.

Thus, the correct approach is to utilize appropriate dry powder extinguishing agents that are formulated to combat fires involving certain metals while providing safety to the firefighters and those nearby.