Single-disc, double-disc and three-disc stainless steel ball valve series mating national standards, quick-release oil pipe joints, ball valves, bends, tees, union joints, stainless steel sanitary pipes, stainless steel all-silica sol pipe fittings and other non-standard pipe fittings, as well as pipe fittings under the U. S. Standard (API), German standard (GPI) and Japanese standard (JPI). The Company also engages in processing of bends, 3000~60001G high-pressure tees and non-standard pipes. The products have found wide application in such sectors as petrochemical industry, chemical industry, foodstuff, pharmaceutical industry, railway and fresh water.