Dingsheng Pipe Co., Ltd specializes in heat-expanding pipes from Diameter 133mm to 920mm and selling industrial pipes of various materials including carbon steel, alloy steel and stainless steel. With a complete elbow and pipe fitting production line, the company can also produce various kinds of elbows, reducers, bends, caps as well as SO and WN flanges. In addition we can provide products according to the user's drawings. The standards are ASME, DIN, GB, JIS. And we have successfully passed API certification.