A Class D fire extinguisher … Sodium chloride (Super-D, Met-L-X, M28, Pyrene Pyromet*) contains sodium chloride salt, which melts to form an oxygen-excluding crust over the metal. Combustible metals, by definition, are Class D hazards. And water fire extinguishers are probably the most common. Class D dry powder and other agents for metal fires. This extinguisher removes the chemical reaction of a fire, and is the most used of all … The wrong type of extinguisher could cause electrical shock, explosion, or spread the fire. There are several class D fire extinguisher agents available; some will handle multiple types of metals, others will not. Class D agents can also be purchased in pails and applied by scoop or shovel for smaller and/or well-contained fires. A carbon dioxide fire extinguisher not only might make the fire worse, but the blast of air can also send flaming metal dust flying in all directions. A special class K extinguisher will safely smother the fire by turning the oil into a foam. Fill it with water and pressurize using a compressed air or nitrogen source with a 100 psi capacity. Read on to learn more about what a Class D fire is and what types of extinguishers qualify as Class D fire extinguishers. To use a Class A, 2-1/2 pound water extinguisher, hold the extinguisher with the nozzle pointing away from you, and pull out the pin located below the trigger. Water and Foam fire extinguishers extinguish the fire by taking away the heat element of the fire triangle. Stand at a safe distance from the fire and point the extinguisher nozzle at the front edge at t WATER MIST is the ultimate extinguisher for Class A fires and where a potential Class C (electrical) hazard exists. These types of fires usually occur in industrial, manufacturing, or laboratory settings when the metal fines - tiny, thin pieces of metal, often shavings or dust generated during the machining process ignite, becoming the fuel element in the fire triangle (fuel, oxygen, heat plus a chemical reaction). Extinguisher comes empty. Water can be a dangerous extinguishing medium for class C fires because of the risk of electrical shock, unless a specialized water mist extinguisher is used. UL ratings are numbers that refer to the extinguisher’s relative power against that class of fire. Water extinguishers are filled with water and pressurized with nitrogen. Unfortunately, Class D fires cannot simply be extinguished with water or just any extinguishing agent. If so, it is vital that you and your employees are protected by a Class D fire extinguisher. Class D fires only involving combustible metals - magnesium, sodium (spills and in depth), potassium, sodium-potassium alloys uranium, and powdered aluminum. If you do not have a specialized fire extinguisher, you should avoid a class D fire, especially in a confined space. Fire extinguishers are classified as types A, ABC, BC or K. It is important to use the right type of extinguisher on the specific class of fire to avoid personal injury or damage to property. Class A Fires: Combustible Materials. Class D fires can be extremely hazardous and require very special types of extinguishers to put them out. A water mist can also be used to extinguish such fires. Fire Extinguishers. The extinguisher works by releasing materials that stop the conduction of electricity. To date, the only type of Class D fire extinguisher is the Dry Powder extinguisher. hazards, call the experts at Koorsen. The agent also helps to absorb the heat from the fuel. Item Code: FEX115MS120DF. 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