AFFF fire extinguishing agent, also known as "light water" foam extinguishing agent, type and resistant to salt water into fresh water type, is a new and efficient foam extinguishing agent. Products with fresh or salt water in proportion of 6:94 or 3:97 in admixture, a fluorocarbon surfactant, hydrocarbon surfactant and additives and water. (1) fire-fighting principles and characteristics of AFFF foam fire extinguishing agent by petroleum products during fire fighting foam and the dual role of water film, which plays a dominant role in the foam, it has very good liquidity, when the foam is injected into oil When the surface of the bubble can expand rapidly in the oil surface, forming a protective film of oil inhibit evaporation and combined cooling effect of the water film and oxygen barrier to fire rapidly flapping its significant advantage is non-toxic and non-corrosive pollution, foaming rapid, long shelf life, stability, good performance, and the resurgence of anti-closure performance, low-expansion foam fire extinguishing agent in the most efficient, fastest a fire, (2) Applications AFFF fire extinguishing agent is mainly for fighting general non-soluble flammable and flammable liquid fires can quickly control the fire spread fast to control and extinguish the fire extinguishing agent to protect the best personnel or equipment. Widely used in large-scale oil, oil, oil tankers, oil depots, petrochemical, hangars and other units of fixed fire extinguishing device can also be used for mobile bubble car, bubble guns, bubble guns, bubble tubes or hook portable fire extinguishers and other equipment. And can transmit fluid under fire. It has good mobility, can flow around obstacles for fire fighting dispersed liquid caused due to equipment breakdown, the effect is especially good. (3) The main technical indicators freezing point ℃ ≤ -.. 7 5 ℃ 25% dialysate time, MIN ≥2 5 anti-freeze, thaw resistance no visible stratification and heterogeneous extinguishing time, MIN ≤3 0 precipitate%. ... (v / v) ≥5 0 25% anti-burning time, MIN ≥10 PH value of 0 to 9 5 6 Storage temperature ℃ - 5 ~ + 45