FlangeChina Flange En1092 ASME B16.5 BS4504 As2129 SABS 1123 DIN2501 DIN2673 A105 Mild Steel Plate Back Carbon Steel Plate Flange, Find details about China Steel Material, Pipe Fitting Flange from Flange En1092 ASME B16.5 BS4504 As2129 SABS 1123 DIN2501 DIN2673 A105 Mild Steel Plate Back Carbon Steel Plate Flange