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 ... , ASTM A53GrB,L245, X42-X70,API5L GrB, etc.ApplicationsStructural pipe, liquid transportation, conveyance of oil and gas, petroleum transportation ... -0317-6899168Skype annie 19900518 Big Diameter Welded Steel Pipe LSAW