... Q235B,Q345B,ASTM A53GrB, X42-X70,etc.1) Standards:GB/T3091-2008,GB/T9711.1, API5L etc.2) Sizes:a)OD ... :325mm-1220mm b)Wall Thickness:8mm-80mm c)Length:6m-12.5m3) Materials ... A53GrB, X42-X70,API5L GrB,etc.1) Standards:GB/T3091-2008,GB/T9711.1, API5L etc.2) Sizes:a)OD ... :325mm-1220mm b)Wall Thickness:8mm-80mm c)Length:6m-12.5m3) Materials ...