Steel grade: Q235,Q345, API 5L series line pipe, API 5CT series casing tube, and Oil pipe ,
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ERW Pipe:1) small size, 1/2''~8" ,sch 40,sch 80 , std ,etc2) large size 8"~24" ,sch 40,sch 80,std ,etcSteel grade: Q235,Q345, API 5L series line pipe, API 5CT series casing tube, and Oil pipe ,drill pipe
