... ,Darcromet 4)Color: RAL3000 UL/FM Grooved Couplings and Fittings Approval: UL/FM/CE approvedStandard grooved specifications: according to VICTAULICMaterial: Ductile Iron ... 898-1class 8.8 Usage:1)Automatic sprinkler system for fire protection on commercial ,civil and municipal constructions like water supplying , ... subway station ,railway station ,airport, seaport,bridge,etc. UL/FM Grooved Fittings