Shanghai Yuanshan is a group of enterprises which consists of several subsidiaries specialize in designing and manufacturing superior quality product in stainless steel pipe, tube, and fitting materials and a variety of commercial and industrial grade valves, with major business operation covering research and development, engineering, manufacturing, and international trading.Shanghai Yuanshan group, including all subsidiaries, are ISO 9001:2000 and PDE/97/23EC certified for its quality management system and manufacturing process for seamless stainless steel pipe, tube, and fitting material production.