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ERW Steel Tube For Belt Conveyer Roller Standard: GB/T13793-2008 material :Q235A、B Q345A、B 外径 O.D (mm) 63.5 76 89 102 108 114.3 127 133 139.8 152 159 165 190.7 193.7 219 壁厚 W.T (mm) 2.5～4.5 3.0～5.0 3.5～6.0 3.5～6.5 4.0～7.0 4.5～8.0 Material :Carbon steel A235 Length:5800mm Straightness :0.2/1000mm max Wall thickness :tolerance :0.3-0.4mm Welded bead :Internal ,removed , Welde seam:in line Remakrk:pipe with basic plastic cap ,with antirusting paint,Weld Bed : Internal,Maximum height after removal shall not exceed 0.3 mm