Welding Neck Flange 1.Material :SS400,A105 ,Q235 ect. 2.Size: ... .Standard:ANSI,ASTM,MSS,JIS,DIN,EN HY carbon steel Welding Neck Flange We started to product flanges from 1986.With ... ,GB etc.2. TypeSlip On Flange, Flat Face Flange, Socket Welding Flange, Blind Flange, Non-standard flange ect.3. Size1/2 ... your quantity11.Supply Capacity700 tons per month HY carbon steel Welding Neck Flange