... :1-12m Product NameERW Welded Galvanized Rectangular Steel PipeSpecificationRound-------20-219mmSquare-------15*15-400*400mmRectangular ... EQUIREMENTS DIN 2394 WELDED AND SIZED PRECISION STEEL TUBES Steel GradeGB/T 13793, GB/T 6728, GB ... , SPHDProcessRaw MaterialWelded: Hot Rolled Steel Coil (HRC) , Cold Rolled Steel Coil (CRC), Pre-pained Galvanized Steel StripEnd:Square cut, Burr removedSurface ...