What concentration of foam is considered high concentration for extinguishing applications?

In the context of foam extinguishing agents, a high concentration typically refers to a foam solution that mixes at a percentage higher than standard levels commonly used for fire suppression. When assessing foam concentrations, options can vary depending on the specific type of foam and the application.

A concentration of 6% is recognized as high concentration because it is significantly above the widely used standard concentration of 3% for many Class B fire scenarios, such as hydrocarbon fuels. This higher concentration is more effective in forming a thick blanket of foam that can smother flames and reduce the release of flammable vapors. Therefore, a 6% concentration is particularly suited for demanding firefighting situations that require enhanced extinguishment capability and is considered ideal for tackling challenging ignitions.

While lower concentrations may suffice for certain scenarios, the 6% foam solution provides optimal performance in controlling and suppressing fires effectively, which justifies its classification as a high concentration for extinguishing applications.