... : Paint,Epoxy Powder,Darcromet 4)Color: RAL3000 UL/FM Grooved Couplings and Fittings Approval: UL/FM/CE approvedStandard grooved specifications: according ... municipal constructions like water supplying ,gas supplying, heat supplying,etc2)Industrial pipeline system on shipping ,mine, oil field,textile,powder plant ... station ,railway station ,airport, seaport,bridge,etc. Grooved Fittings and Couplings