Fire Extinguisher Dry Chemical Powder (DCP)

Fire Extinguisher Dry Chemical Powder (DCP)

At USC, “ABC” fire extinguishers are filled with a fine yellow powder. The greatest portion of this powder is composed of monoammonium phosphate. Nitrogen is used to pressurize the extinguishers.

Description

Fire Extinguisher Dry Chemical Powder (DCP)

At USC, “ABC” fire extinguishers are filled with a fine yellow powder. The greatest portion of this powder is composed of monoammonium phosphate. Nitrogen is used to pressurize the extinguishers.
ABC extinguishers are red and range in size from 5 lbs to 20 lbs on campus.
It is extremely important to identify which types of dry chemical extinguishers are located in your area.
Read the labels and know their locations! You don’t want to mistakenly use a “BC” extinguisher on a Class A fire, thinking that it was an “ABC” extinguisher.
Extinguisher LabelAn “ABC” extinguisher will have a label like this, indicating that it may be used on class A,B, and C fires.
Dry chemical extinguishers put out fire by coating the fuel with a thin layer of dust, separating the fuel from the oxygen in the air. The powder also works to interrupt the chemical reaction of fire, so these extinguishers are extremely effective at putting out fire.
These extinguishers will be found in a variety of locations. New buildings will have them located in public hallways. They may also be found in laboratories, mechanical rooms, break rooms, chemical storage areas, offices, university vehicles, etc.
Dry chemical extinguishers with powder designed for Class B and C fires may be located in places such as commercial kitchens or areas with flammable liquids

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