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 …

Jul 8, 2024 · Class A firefighting foam is specifically formulated to combat Class A fires, which involve solid materials such as wood, paper, and textiles. It is commonly used in structural …

Feb 2, 2022 · Class "A" foam will increase wetting effectiveness, which allows for greater penetration into Class "A" fuels. It also gives water a foaming ability, which allows water to …

Apr 1, 2019 · There are many different types of foam for firefighting: Class A foam is used for combustibles, structural fires and wildfires; Class B foam is used for ignitable liquids, like …

There are two major classes of firefighting foam: Class A and Class B. Class B is also called Aqueous film forming foam (AFFF) and is usually created using PFAS. It is a highly effective …

Class A foams may be used as a firefighting agent or as a fire barrier. When used as a wetting agent, the concentrate lowers the surface tension of the water, allowing better penetration into …

Apr 1, 2010 · Class A foam application techniques are typically straightforward – attacking with direct or indirect methods. Class B methods, on the other hand, require strategic stream …

Jan 23, 2025 · Class A foam is specially formulated to make water more effective for firefighting. The surfactants in Class A foam significantly reduce water’s surface tension, which penetrates …

Jun 7, 2001 · The AFFF is exactly what it is, AFFF or Class "B" foam. It is not Class "A" foam, regardless if you dilute the Class "B" or not. Each type of foam is design for a specific application.

Class “A” Fire: A fire in combustibles that exhibit deep seated burning characteristics such as wood, paper, fabric, tires and peat, where the cooling, smothering and soaking ability of Class …