if you’ve ever seen firefighters putting out a fire, either in person or on tv, you’ve probably noticed that they aren’t just hooking up to the fire hydrant and spraying everything down with water (at least in most cases). firefighting foam is a material used for fire suppression. these foams have been around since the beginning of the 20th century and contain surfactants (foaming agents), organic solvents, corrosion inhibitors, and stabilizers. class a foams were developed specifically for controlling wildfires, and is now used for class a fires, such as structure fires. class b foams are designed for flammable liquids (designated class b fires). protein foams contain natural proteins and are generally biodegradable; synthetic foams are made of synthetic foaming agents. alcohol-resistant foams work specifically to create a protective layer between the foam and the burning material, which prevents the alcohols in the burning material from breaking down the foam and rendering it ineffective.
they are low viscosity and have an expansion rate of less than 20 times. the expansion ratio of medium-expansion foams is 20–100. high-expansion foams are best for enclosed areas that need to be filled quickly, as their expansion rate is over 200–1000. if the only and greatest fire risk to your facility is structural, a class a foam may be appropriate. a class b foam is what most situations in manufacturing facilities, petrochemical operations, and even schools will require. still have questions about fire fighting foam? at vanguard, it’s always our mission to help our clients choose the ideal firefighting foam for their application, that’s exceptionally effective, but that also puts minimal strain on the environment.
firefighting foam is a foam used for fire suppression. its role is to cool the fire and to coat the fuel, preventing its contact with oxygen, resulting in suppression of the combustion. fire-fighting foam was invented by the russian engineer and chemist aleksandr loran in 1902. firefighting foam is a foam used for fire suppression. its role is to cool the fire and to coat the fuel, preventing firefighting foam is perfectly suited to suppress fire. it is composed of premix solution (a ratio of water and foam concentrate) mixed with air. it forms a foam: a fire fighting foam is simply a stable mass of small air-filled bubbles, which have a lower density than oil, gasoline or water. foam is made up of, fire fighting foam types, fire fighting foam types, fire fighting foam types pdf, pfos fire fighting foam, fire fighting foam concentrate.
firefighters use aqueous film-forming foam (afff) to help extinguish difficult-to-fight fires, particularly fires that involve petroleum or there are two major types of firefighting foam, class a and class b. class a foams are used to extinguish fires caused by wood, paper, and brush. fire-fighting foam is made up of a mass of small bubbles of lower density than most flammable liquids and water. foam is a blanketing and, 7 properties of firefighting foam, afff foam, what is fire fighting foam made of, fire fighting foam calculations, afff foam is also known as, what is afff foam made of, afff foam replacement, class b foam, class a foam vs class b foam, fluoroprotein foam.
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