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This provides dramatic fire knockdown, an important factor in crash rescue firefighting. In the early 1970s, National Foam, Inc. invented alcohol-resistant AFFF technology. AR-AFFF is a synthetic foam developed for both hydrocarbon and polar-solvent materials. Polar solvents are combustible liquids that destroy conventional fire-fighting foam.
A twin-agent fire extinguishing system (TAFES), also commonly referred to as a twin-agent unit (TAU), incorporates the benefits of dry chemical and foam (AFFF or CAFS) fire extinguishing agents. [1] It is most commonly used for AR-FF operations and in industrial areas with high class B hazards.
Dry chemical powder is used on all classes of fires. Dry chemical powder puts out the fire by coating the burning material with a thin layer of dust, thereby 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 the fire.
Fire extinguishers are one of the most common manual fire suppression devices and are required in all commercial buildings and vehicles. [2] Fire extinguishers can be used with little to no training and are meant for small incipient stage fires. The most common extinguisher is the ABC extinguisher and are found in most offices and homes.
Any fire retardant approved for use against wildfires on US Federal lands must be included on the United States Forest Service Qualified Products List. [16] To be added to that list, the product must be tested by Wildland Fire Chemical Systems, a division of the National Technology and Development Program. This process can take up to two years ...
Understanding the cause is essential so that the correct fire extinguisher is used; if the wrong extinguisher is used, it can either make the fire worse or fail to control it. For example, using a type A, B, C fire extinguisher on a chemical fire will do the opposite of what the extinguisher is supposed to do and can cause an explosion.
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