We design, produce and install compressed air foam (CAF) extinguishing systems to be applied for the protection of internal floating tanks used for oil or fuel storage. It is a fully automatic and pressurized CAF extinguishing system which is capable of extinguishing the fire at the initial stage. CAF generator with nozzles special for tanks and thermal lineer sensing are together designed and implemented to protect the entire gap of a floating roof tank. When the system is activated, CAF is automatically blown into the entire gap and the gap is filled with the high quality CAF agent within seconds . CAF quickly extinguishes the flame in the evacuated rimseal area and protects the fuel tank against reignition. The ability of quick expansion and generation of the CAF presents the ideal solution for fire protection of the fuel-stored external floating roof tanks.