... OD 325--1220mm WT 8--80mm Certificate ISO and API Bevel PE BE Big diameter steel pipe(LSAW)StandardsGB/T3091-2008,GB ... ,Q345B, ASTM A53GrB,L245, X42-X70,API5L GrB, etc.ApplicationsStructural pipe, liquid transportation, conveyance of oil and gas, petroleum transportation etc ... 8613613393575Tel 86-0317-6899168Skype annie 19900518 Big Diameter Welded Steel Pipe LSAW