... TypesAmerican Series: Flat Face(FF), Raised Face(RF), Tongue(T), Groove(G), Female(F), Male(M), Ring Joints Face(RJ)European ... (Flat Face), Type B(RaisedFace), Type C(Tongue), Type D(Groove), Type E(Spigot), Type F(Recess), Type G(O-Ring ... Spigot), Type H (O-Ring Groove)Industries ServedElectrical power, petroleum, natural gas, chemical, shipbuilding, heating, papermaking ...