Standard BS1387,ASTM A53,ASTM A500,ASTM A513M-06B,GB/T6728-2017.Quality Inspection.Packaging Container Loading.Product Feature Advantage.Analysis of appearance quality and advantages of black steel square tubeGB/T 6728-2002,PDF in English ,page1.Some results are removed in response to a notice of local law requirement.For more information,please see here.12345Next
Product Details Product Name Square Steel Pipe Standard DIN EN10210,EN10219,GB/T3094-2000,ASTM A500,JIS G 3466,GB/T6728-2002 Square Tube Dimension 20mm*20mm-1000
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