Steel Pipes, Flange, Pipe Spool manufacturer / supplier in China, offering ASTM A252 Welded Steel Pipe En 10025 S275 LSAW Welded Carbon Steel Structural Round, LSAW ASTM A53/API 5L Gr. B Sch40 Sch80 High Strength Carbon Welded Pipes, ASTM A519 4130 Alloy Steel Pipe API 5L X70 X65 X60 48 Inch LSAW Pipe and so on.