... :DN15-DN2000 3.Standard:ANSI,ASTM,MSS,JIS,DIN,EN HY carbon steel Welding Neck Flange We started to product flanges ... Steel Material: A105,SS400,SF440 RST37.2,S235JRG2,P250GH,C22.8 ect.5. Used forpetroleum, chemical, power, gas, water, linepipe, heat ... -30days depends on your quantity11.Supply Capacity700 tons per month HY carbon steel Welding Neck Flange