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Class B Fires and Its Extinguishing Agents

Posted Date:2024/11/19

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 B Fire and Its Fire-fighting Agents."

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

Class B Fire: Class B fire refers to liquid fire and fire involving melting solid materials. Examples include gasoline, kerosene, crude oil, methanol, ethanol, asphalt, and paraffin fire.

Suitable Fire-fighting Agents: To extinguish Class B fires, i.e., liquid fires and fires involving melting solid materials, dry powder, foam, halogenated hydrocarbon, and carbon dioxide fire extinguishers should be used (it is worth noting that chemical foam fire extinguishers cannot extinguish Class B polar solvent fires, as chemical foam comes into contact with organic solvents, and the foam is quickly absorbed, causing the foam to disappear, rendering it unable to extinguish the fire). Alcohol, aldehyde, ketone, ether, ester, etc. are all examples of polar solvents.

Unsuitable Fire-fighting Agents: Chemical foam fire extinguishers and water. Chemical foam fire extinguishers cannot extinguish Class B polar solvent fires, as chemical foam comes into contact with organic.