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Class D Fire and Its Extinguishing Agents

Posted Date:2024/12/3

I.Role of Fire-fighting Agents in SDS

In the fifth section of the SDS on "Firefighting Measures," relevant requirements should be described to ensure that the SDS provides a firefighting guidance plan in case of fire, including fire-fighting agents, fire-fighting methods, and fire-fighting precautions.

Because workers or SDS users are unlikely to be fire-fighting experts and may not be able to make the right choice in case of a fire, choosing the wrong fire-fighting agent (i.e., one that reacts with flammable materials) would be disastrous. In this article, we will teach you how to choose suitable and unsuitable fire-fighting agents in the fifth section of the SDS.

Today, we will focus on "Class D Fire and Its Fire-fighting Agents."

II. Suitable and Unsuitable Fire-fighting Agents for Different Types of Fires

Class D fire: Class D fire refers to metal fires. Examples include titanium, potassium, sodium, magnesium, aluminum-magnesium alloys, alkyl-type, liquid metal-type fires, etc.

Appropriate extinguishing agents: For Class D fires, i.e. metal fires, there are no standardized extinguishers products in China at present. Currently, the main extinguishers for Class D fires abroad are graphite powder extinguishers and dry powder extinguishers for metal fires. In the absence of standardized extinguishers and extinguishing agents in China, dry sand or cast iron slag can be used for extinguishing.

Inappropriate extinguishing agents: Water-based fire extinguishers: Water reacts with active metals such as sodium and potassium to produce heat and hydrogen, and may even cause an explosion; Carbon dioxide fire extinguishers: Many metals react violently with carbon dioxide at high temperatures, thereby exacerbating the fire or causing an explosion, so carbon dioxide cannot be used; Foam fire extinguishers: Foam fire extinguishers contain water, so they cannot be used to extinguish metal fires.