Which class of extinguisher is used for flammable fats?

The class of extinguisher specifically designed for flammable fats and cooking oils is the Wet Chemical extinguisher. These types of fires are classified as Class K (or Class F in some regions), which involves oils and fats that can pose a significant risk when ignited. Wet Chemical extinguishers contain a solution that not only cools the flames but also forms a layer of soapy film on the surface of the burning fat, effectively smothering the fire and preventing re-ignition.

This is particularly important because standard extinguishers such as water or foam can exacerbate fires involving fats; water can cause splattering and spread the fire, while foam is not suitable for this type of fire since it can also react with the oil. Dry Powder extinguishers can be used for a variety of fires, but they do not provide the same cooling and smothering action that wet chemical extinguishers do on flammable fats. This specialized approach makes Wet Chemical extinguishers the most appropriate choice for such scenarios, ensuring both safety and effectiveness in extinguishing these types of fires.