... , BS4504, SABS1123, EN1092-1, UNI, AS21293) Type: Plate, Slip-on, Welding Neck. Thread, Socket Weld, Blind Flanges4) Material: A105, SS400, SF440 ... ) Supply Capacity: 20,0000 tons per year. about usZhengzhou Bihe Co., LtdWith the rich experience of exporting flanges, we have many ...