... , JIS, API 3.Size:1/2"~28 Carbon Steel Pipe A106/A53/API 5 L1. Material: Gr A, Gr B, X42, X52, X60,X80,10#,20 ... : Quality oil casing tube, the line pipes, the petroleum cracking tube, the fluid pipes, the structure pipes, the boiler tubes ,the erw pipe ... ,the rectangular pipe,suare pipe, LSAW pipe,HFW pipe,galvanized steel pipe etc. Supply Carbon Steel Pipe(A106 ...