"Class K" covers cooking oils and fats .
Class K extinguishers are designed to fight cooking fat, oil, and grease fires, such as deep fryers. The chemicals inside these extinguishers react with the grease to form a foamy layer that will not burn.
Class B: Class B extinguishers are used on fires involving flammable liquids, such as grease, gasoline, oil, and oil-based paints.
Class B extinguisher
No, hence them being Class D fire extinguishers they are only used on combustible metal fires. there are different class d extinguishers as well for specific metal fires no one class d extinguisher on all metal fires mostly very specific
Class C fire Extinguishers
Class B fire extinguishers are best suited for fires involving flammable liquids, such as gasoline, oil, grease, and solvents. These extinguishers typically use foam, dry chemical, or carbon dioxide agents to effectively smother and extinguish the flames. They should not be used on fires involving ordinary combustibles (Class A) or electrical equipment (Class C) unless specifically rated for those classes as well. Always check the extinguisher label for specific applications.
Extinguishers with a Class C rating (C can be used on Currents)
Class D Class D fire extinguishers are used for various types of flammable metals. A class D fire extinguisher can contain sodium chloride, graphite, or copper powder. A sodium chloride fire extinguisher would be used on metals containing magnesium, sodium, potassium, and sodium-potassium alloys. Copper and graphite fire extinguishers would be used for lithium and lithium alloy fires.
Class K extinguishers are used on Class K fires, i.e., kitchen grease. It may use a special high-temperature foam that causes saponification of the fat and oil, causing it to be extinguished.
Class A extinguishers are designed for "ordinary flammable materials" (organic solids such as paper and wood) but not liquids like gasoline, grease, electrical fires, or flammable metals.
Class K extinguishers are used on Class K fires.
Carbon dioxide fire extinguishers can be used on Class B, C and E.