... /water supply and sewage workFlange Facing TypesAmerican Series: Flat Face(FF), Raised Face(RF), Tongue(T), Groove(G),Female(F), Male(M ... ), Ring Joints Face(RJ)European Series: Type A(Flat Face), Type B ... E(Spigot), Type F(Recess), Connection TypeRaised Face, Flat Face, Ring Type Joint, Lap-Joint Face, Large Male-Female, Small Male-Female, ...