... Standard:ANSI,ASTM,MSS,JIS,DIN,EN HY carbon steel Welding Neck Flange We started to product flanges from 1986 ... etc.2. TypeSlip On Flange, Flat Face Flange, Socket Welding Flange, Blind Flange, Non-standard flange ect.3. ... Size1/2-78 inch (DN15-DN2000)4. MaterialCarbon Steel Material: A105,SS400,SF440 RST37.2,S235JRG2,P250GH,C22 ... .Supply Capacity700 tons per month HY carbon steel Welding Neck Flange