What factors determine the size of a Class D extinguisher in Class D hazards?

The size of a Class D extinguisher is determined primarily by the specific combustible metal involved in the hazard. Class D fires involve combustible metals such as magnesium, sodium, potassium, and titanium, which react differently to extinguishing agents. Each type of combustible metal has specific fire risks and requirements for effective extinguishment. Therefore, understanding the particular metal allows for the selection of an appropriate extinguisher size and agent, ensuring that it meets the necessary firefighting capabilities for the specific danger presented by that metal.

While other factors, such as the type of flammable gas or the operating temperature, may influence the overall fire hazard assessment, they do not directly dictate the sizing of Class D extinguishers as specifically as the nature of the combustible metal does. Additionally, the location of the hazard may impact accessibility and the strategic placement of extinguishers but is not a determining factor for the size of the extinguisher itself.