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Fluoroprotein foam has fast knockdown characteristics and it can also be used together with dry chemicals that destroy protein foam. In the mid-1960s, the US Navy developed aqueous film-forming foam (AFFF). This synthetic foam has a low viscosity and spreads rapidly across the surface of most hydrocarbon fuels. A water film forms beneath the ...
After testing a dry type 2 foam in several situations, Johnny Murdock notes, "The emerging consensus is that the dryer foams (type II; maybe type I) should be used to suppress vapors, protect unburned structures, build wildland fire lines involving unburned fuels; … and that structural fire suppression requires a wetter foam (type IV or type ...
Aqueous film-forming foam (AFFF), used on A and B fires and for vapor suppression. The most common type is portable foam extinguishers. ... A 2.5 US gal (9.5 L) USCG ...
After a fire on Great Western Road in Dennis Tuesday morning, residents in Harwich were placed under a “do not drink” order Wednesday.. Officials said firefighting foam used for the blaze ...
Detergent foam See Aqueous film-forming foam. Distributor pipe Portion of fire hydrant or sprinkler system connecting main loops to smaller loops where outlets are located. Divisional valve A valve isolating a segment of a (usually underground) piping system. This may be useful for dealing with impairments or maintenance. Double female
The unit is then filled with 5.7 litres (1.5 US gal) of water and Class A foam, aqueous film forming foam (AFFF), film-forming fluoroprotein (FFFP) or commercial detergent is added to the water in a 1% ratio for class A fires and a 3–6% ratio for Class B fires. Typically, the tip of the smooth-bore application nozzle is then cut off to allow ...