What is the traditional symbol for a Class K fire extinguisher?

What is the traditional symbol for a Class K fire extinguisher?

• A. Black hexagon
• B. Blue circle
• C. Red triangle
• D. Green square

Answer: (A)

Extinguisher labeling uses simple shapes to instantly convey the class of fire the device is designed to fight. For Class K fires—fires involving cooking oils and fats in commercial kitchens—the traditional symbol is a black hexagon. This unique shape helps staff and responders recognize equipment intended for kitchen grease fires, which require a different approach than fires involving ordinary combustibles or electrical sources. Class K extinguishers contain a wet chemical agent that saponifies fats and forms a soapy layer that cools and smothers the fire, making them specifically suited to kitchen environments. Other class symbols commonly seen use different shapes and colors, such as a blue circle for electrical fires, a red triangle for flammable liquids, and a green square for ordinary combustibles, so the hexagon stands out to indicate Class K.

Extinguisher labeling uses simple shapes to instantly convey the class of fire the device is designed to fight. For Class K fires—fires involving cooking oils and fats in commercial kitchens—the traditional symbol is a black hexagon. This unique shape helps staff and responders recognize equipment intended for kitchen grease fires, which require a different approach than fires involving ordinary combustibles or electrical sources. Class K extinguishers contain a wet chemical agent that saponifies fats and forms a soapy layer that cools and smothers the fire, making them specifically suited to kitchen environments. Other class symbols commonly seen use different shapes and colors, such as a blue circle for electrical fires, a red triangle for flammable liquids, and a green square for ordinary combustibles, so the hexagon stands out to indicate Class K.