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Fire Extinguisher Training <br /> 3. Dry Chemical (ABC, BC, DC) <br /> Will have gauge <br /> May have hose <br /> ®�£ Fine , ABC extinguishers are red. <br /> Powder <br /> At Stockton Tri Industries, Inc., ABC extinguishers are filled with a fine, yellow <br /> powder. This powder is mostly composed of monoammonium phosphate. The <br /> extinguishers are pressurized with nitrogen. <br /> Dry chemical extinguishers put out fire by coating the fuel with a thin layer of <br /> dust. This separates the fuel from the oxygen in the air. The powder also works <br /> to interrupt the chemical reaction of fire. These extinguishers are very effective <br /> at putting out fire. <br /> Dry chemical extinguishers come in a variety of types. You may see them <br /> labeled- <br /> 0 DC (for dry chemical) <br /> 0 ABC (can be used on Class A, B, or C fires) <br /> 0 BC (designed for use on Class B and C fires) <br /> It is extremely important to identify which types of dry chemical fire extinguishers <br /> are located in your area! <br /> VRM An "ABC" extinguisher will have a label like this, <br /> indicating it may be used on Class A, B, and C <br /> ` fi res. <br /> You don't want to mistakenly use a "BC" extinguisher on a Class A fire thinking <br /> that it was an "ABC" extinguisher. <br /> Dry chemical extinguishers with powder designed for Class B and C fires ("BC" <br /> extinguishers) may be located in places such as commercial kitchens and areas <br /> with flammable liquids. <br /> At Stockton Tri Industries, Inc. you will find ABC's in hallways of buildings, in <br /> Shop areas, break rooms, offices, chemical storage areas, mechanical rooms, <br /> Forklifts, vehicles, and etc. <br /> Oklahoma State University Page 4 <br />