Cangzhou Zhongguan Fittings and Valves Co., Ltd. is one of the leading manufacturers of pipe fittings and valves in materials of SS304 and SS316 in China. As an ISO9001:2000 certified company, we have a well-defined quality control system that is structured to meet the international standard. Our Products Pipe fittings: elbows, tees, crosses, unions, bushings, caps, inserts, plugs, sockets, reducers, nipples & stub ends SS valves: ball valves, globe valves, check valves, gate valves ...