What type of extinguishers work best on Class D fires?

Class D fires are specifically related to combustible metals, such as magnesium, titanium, sodium, and potassium. These types of fires require specialized extinguishing agents that can effectively suppress the unique burning characteristics of metal. Dry powder extinguishers are designed for this purpose, as they contain agents that can smother and absorb the heat from the fire effectively without reacting with the burning metal.

Water-based extinguishers and foam extinguishers are not suitable for Class D fires because they can react with certain metals, potentially causing violent reactions or explosions. Similarly, CO2 extinguishers may not provide the necessary cooling and suffocating effects for metal fires, as they do not cover the burning materials adequately or absorb enough heat to extinguish the flames. Therefore, dry powder extinguishers are the best choice for combating Class D fires, as they specifically inhibit the combustion process of metals and are formulated to provide a safe and effective means of extinguishing these types of fires.