Foam extinguishers can come in different varieties, Aqueous Film Forming Foam (AFFF) being the most popular type. AFFF extinguishers provide to be a low-cost effective solution that offers high cooling and produces a foam covering that starves the fire from its fuel. In this article, we will cover what the foam extinguisher is used for, what class fires, its pros, and cons and how to ensure good maintenance so you can have an effective fire protection system. In this article, we will focus on the AFFF fire extinguishers .
Foam fire extinguishers can be used on Class A and B fires. They are most suited to extinguishing liquid fires such as petrol or diesel and are more versatile than water jet extinguishers because they can also be used on solids such as wood and paper. The foam extinguishes liquid fires by sealing the surface of the liquid, preventing flammable vapour reaching the air and starving the fire of fuel. They are not suitable for use on free flowing liquid fires.
