Black Steel Pipe, Galvanized Steel Pipe, Gi Coil PPGI manufacturer / supplier in China, offering API 5L Gr. B Sch40 Black Painted Hot Rolled Seamless Carbon Steel Pipe, ASTM A53 Gr. B 20# Seamless Steel Pipe for Transporting Water and Oil, ASTM A106 A53 6m 12m API Seamless Steel Pipe Ms Tube and so on.