hot dip galvanized steel pipe specification: 10*10-800*800 Standard: GB3091-2001, ASTM A53, ASTM A106 commodity: hot dip galvanized steel pipeSpecification: 10*10-800*800Standard: GB3091-2001, ASTM A53, ASTM A106galvanized coating: as customer's demand hot dip galvanized steel pipe is widely used in decorational fields, with professional manufacturing; we can offer you best quality GI tube with ...