... :DN15-DN2000 3.Standard:ANSI,ASTM,MSS,JIS,DIN,EN HY carbon steel Welding Neck Flange We started to product flanges ... -standard flange ect.3. Size1/2-78 inch (DN15-DN2000)4. MaterialCarbon Steel Material: A105,SS400,SF440 RST37.2,S235JRG2,P250GH ... -30days depends on your quantity11.Supply Capacity700 tons per month HY carbon steel Welding Neck Flange