1) Carbon steel pipe fitting and stainless steel fittings 2) Major Products: Seamless pipes, Elbow, Reducer, Tee, Cross, Pipe Tianjin Rongkun Pipe Fittings Co., Ltd.Tianjin Rongkun Pipe Fittings Co., Ltd. here, as a professional manufacturer and worldwide supplier of pipe fittings made-in-China, our products include elbows, pipe reducers, tees, big bends, flange, caps made from carbon steel, ...