Aqueous film-forming foams

AFFF, AQUEOUS FILM-FORMING FOAM Fii e-figliting foam wliicli flows on burning liquid as a film, providing rapid knock-down. 

The type of flammable liquid - determines the type of foam, e.g. standard or aleohol-resistant grade. Aqueous film-forming foam may be used for rapid knoek-down . 

Standard dry powder or multi-purpose dry powder AFFF (aqueous film-forming foam)... 

It was only recently that the use of aqueous film-forming foams (AFFF) containing perfluorinated surfactants was recognised as a source of groundwater pollution (Table 6.7.3). 

The foam produced with Aqueous Film Forming Foam (AFFF) concentrate is dry-chemical compatible. Protein and fluoroprotein foam concentrates and AFFF concentrates are incompatible and should not be mixed although foams separately generated with these concentrates are compatible and can be applied to a fire in sequence or simultaneously. AFFF is available in various liquid concentrate percentages. 

As noted earlier, one of the agents considered suitable for the extinguishment of petroleum-liquid fires is aqueous film forming foam. This is a liquid concentrate that contains a fluorocarbon surfactant to help float and spread the film across the petroleum-liquid surface and is commonly referred to as A Triple F . AFFF concentrates of 1, 3, or 6 percent are available, all with about... 

AFFF Abbreviation for Aqueous Film Forming Foam, which is an extinguishing agent that may be used on many flammable liquids. Discussions and examples may be found in Chapter 4 of the handbook. 

Perfluoroalkyl substances are synthetic products that have been manufactured for over 50 years [1]. They have been used in many commercial products such as refrigerants, surfactants, polymers, pharmaceuticals, wetting agents, lubricants, adhesives, pesticides, corrosion-inhibitors, stain resistant treatments for leather, paper and clothing [1,3,4]. Other uses have included, aqueous film-forming foams (AFFF) for fire-fighting, mining and oil-well... 

Where the vapours to be controlled are flammable, many of these foams are quite similar to the protein, fluoroprotein, and aqueous-film-forming foams used in firefighting [590,594,598] (see also Section 12.9). Where longer-term odour and toxicity control are more important many of these foams are polymer-thickened and gelling foams [592-594]. Other applications of foam blankets are discussed in Sections 10.5 and 13. 

Alcohol Resisting Aqueous Film Forming Foam... 

AFFF-AR) A fire-extinguishing foam formulated specifically for alcohol, polar solvent, and hydrocarbon fires. See also Fluoroprotein Foam, Film Forming Fluoroprotein Foam, Aqueous Film Forming Foam. 

A number of factors contribute to the effectiveness of foam as a vapor-suppressant. These include the type of foam, its expansion ratio, its drainage time, the rate of application of the foam (gal per min/ft2), and its application density (gal/ft2). Chemical foams have become obsolete, with mechanical foams now being used worldwide. A mechanical foam that has recognized attributes for vapor suppression is aqueous film-forming foam (AFFF). It is a synthetic foam (as compared to protein foams) with a surfactant that is part fluorochemical and part hydrocarbon. It suppresses vapors by forming an aqueous film produced by draining its foam bubbles. 

Aqueous film-forming foam (AFFF) Automatic closed-head sprinklers ... 

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