2.3.6.1 Foam

For extinguishing a fire and limiting evaporation, Aqueous Film Forming Foam (AFFF) or Alcohol Type Concentrate have been proven to be effective, i.e. the lower flammability limit is not attained above the layer. Because a foam layer can break down, this function must be watched and maintained. As a few centimeters of foam are sufficient to smother a fire inside a container, the contained amount of water is unlikely to trigger a so-called slop over; larger amounts may do so.

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