LSAW PIPE 1.Standards ANSI / API / AWWA / DIN / BS / JIS ... Q345B,ASTM A53GrB, X42-X70,etc.1) Standards:GB/T3091-2008,GB/T9711.1, API5L etc.2) Sizes:a ... X42-X70,API5L GrB,etc.4) Application:Structural pipe,liquid transportation,conveyance of oil and gas,petroleum transportation ... X42-X70,API5L GrB,etc.4) Application:Structural pipe,liquid transportation,conveyance of oil and gas,petroleum transportation ...