Big Diameter Welded Steel Pipe LSAW OD 325--1220mm WT 8--80mm Certificate ISO and API Bevel PE BE Big diameter steel pipe(LSAW)StandardsGB/T3091-2008,GB/T9711.1, API5L etc.Outside diameter325mm-1220m(12inch-48inch)Wall thickness:8mm-80mmLength6m-11.8mMaterialsQ235B,Q345B, ASTM A53GrB,L245, X42-X70,API5L GrB, etc.ApplicationsStructural pipe, liquid transportation, conveyance of oil and gas, ...