... : GB, DIN, JIS, ASTM 4)Section Shape: Round Dingrun ASTM A53-B Seamless Steel Tubes And Pipes 1)Business Type: Manufacture and ... exporters and importers of PRECESION STEEL PIPES & TUBES, based in Jiangyin city, Yangtze River Delta, China. The factory locates alongside ... Yuecheng Town, which is the most developed region in China. Huning highway, Yanjiang highway, Xicheng highway, Xinchang railway ...