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A fire demonstrating Class A foam in a CAFS system. Class A foams were developed in the mid-1980s for fighting wildfires. Class A foams lower the surface tension of the water, which assists in the wetting and saturation of Class A foams with water. It penetrates and extinguishes embers at depth. This aids fire suppression and can prevent re ...
In fire classes, a Class B fire is a fire in flammable liquids or flammable gases, petroleum greases, tars, oils, oil-based paints, solvents, lacquers, or alcohols. [ 1] For example, propane, natural gas, gasoline and kerosene fires are types of Class B fires. [ 2][ 3] The use of lighter fluid on a charcoal grill, for example, creates a Class B ...
The source of contamination was later found to be a military fire-fighting exercise site in which PFAS containing fire-fighting foam had been used since the mid-1980s. [125] Additionally, low-level contaminated drinking water has also been shown to be a significant exposure source of PFOA, PFNA, PFHxS and PFOS for Swedish adolescents (ages 10 ...
Fire retardant. A fire retardant is a substance that is used to slow down or stop the spread of fire or reduce its intensity. This is commonly accomplished by chemical reactions that reduce the flammability of fuels or delay their combustion. [ 1][ 2] Fire retardants may also cool the fuel through physical action or endothermic chemical reactions.
The fire triangle or combustion triangle is a simple model for understanding the necessary ingredients for most fires. [ 1] The triangle illustrates the three elements a fire needs to ignite: heat, fuel, and an oxidizing agent (usually oxygen ). [ 2] A fire naturally occurs when the elements are present and combined in the right mixture. [ 3]
The compound is also used in "insulators for electric wires, planar etching of fused silica", [34] fire fighting foam, [2] [37] and outdoor clothing. [38] As a protonated species, the acid form of PFOA was the most widely used perfluorocarboxylic acid used as a reactive intermediate in the production of fluoroacrylic esters. [39] [40]
The Essentials of Fire Fighting is the required training manual used in countless local fire departments and state/provincial training agencies in every region of the United States and Canada. Since the release of the first edition of this manual in 1978, more than 2.5 million copies of the Essentials of Fire Fighting have been distributed to ...
Teflon flu, aka polymer fume fever, is a term used to describe people who have gotten sick after being exposed to fumes from Teflon pans, according to the National Capital Poison Center ...