certificate:
ISO 9001-2008;CE
surface:
hot dip galvanized, untreated, painting, spray coating.
welding way:
electrical forged welding, hand welding
Material standard:
BS 4360:1990, ASTM A36/A36M-96, AS 3679
HDG standard:
BS729, ASTM A123/A123M-97a, ASTM A36/A36M-96