The size and degree of the hazard should also be considered when selecting a fire extinguisher. OSHA requires commercial properties and employers to choose and distribute fire extinguishers depending on the classes of expected workplace fires. How to Improve Workplace Safety with Class K Fire Extinguishers? The alkaline mixture interact with cooking media to effectively quench the fire and reduce the risk of re-ignition The extinguishers leverage wet mist with alkaline mixtures in the form of potassium citrate, potassium acetate, or potassium carbonate. The right type of Class K extinguisher should effectively separate the fuel from the oxygen and adequately absorb the heat elements and smother raging kitchen fire effectively.Ĭurrently, the only effective extinguishers rated as Class K are the Wet Chemical Fire extinguishers that meet regulatory and industry standards. Only a Class K fire extinguisher will be effective for Class K fire and must be kept within reach in a commercial kitchen setting. What Types of Extinguishers are Rated as Class K Fire Extinguishers? The fire extinguisher intended for fighting a Class K fire is labeled with the letter K so users can quickly identify it during emergencies. Ideally, the alkaline mixtures combine with the fatty acid to create a soapy foam on the surface, which effectively separates and absorbs the fire’s heat elements (the fuel, heat, and oxygen). Saponification is a chemical reaction that occurs when alkaline mixtures come into contact with fat or cooking oil. A class K fire extinguisher is used to control fires involving cooking media such as oils, fats, and grease commonly found in cooking places such as commercial restaurants.These fire extinguishers work through saponification to extinguish flames completely. These fires can only be fought effectively with a unique extinguishing agent found in a Class K type of fire extinguisher.įire extinguishers are classified depending on the type of fire that they will extinguish. One of the most dangerous and stubborn fires to combat is the Class K fire, common in commercial kitchens. Fires are typically classified according to the type of fuel that feeds them. These fires led to 3,704 deaths, 16,600 injuries, and losses amounting to 14.8 billion US dollars. According to the US Fire Administration (USFA), there were 1,291,500 fire incidences in the country in 2019.
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