... Certificate ISO and API Bevel PE BE Big diameter steel pipe(LSAW)StandardsGB/T3091-2008,GB/T9711.1, API5L etc. ... Q345B, ASTM A53GrB,L245, X42-X70,API5L GrB, etc.ApplicationsStructural pipe, liquid transportation, conveyance of oil and gas, petroleum transportation etc ... Markingthe sizes, steel grade or the standard can be marked on the pipeProcess techniqueJCOE mold.Surface:black painting, PE coating, ...