Product Name: Forged Steel FlangesPlace of Origin: ChinaOur production conforms to HGJ, JB and GB standards, and our flange specifications are DG 10 - 600 and PG 0.1 - 25MPa. Pressure vessel A, B flat-welding flange and long neck down ward welding flange are produced according to JB1158-1160. The flange specifications are DG 300 - 1000 and PG 0.25 - 6.45Mpa. As required in the JB75 Technical Conditions for pressure vessel forge pieces, the material performance is subject to heat treatment, mechanics testing, ultrasonic flaw detection and coloring flaw detection. Flanges\'\' sizes and tolerance are that the tube flange conforms to GB91125-88 and the pressure vessel flange conforms to JB1157-82. We can provide integral flanges, screw thread flanges, down ward welding flanges, flat-welding flanges with necks, socket welding flanges with necks, down ward welding ring loose tube flanges with necks, plate flat welding flanges, down war ring loose tube plate flanges, flat welding loose tube plate flanges, plate down ward loose tube flanges and flange covers. Forms of airproof faces are flat, convexity, convexity and concave and ring connection.