we can supply ansi slip-on flanges ,welding neck flanges ,socket welding flanges ,blind flanges and so on Materials, Grades ... (S),SCH 40(S), STD,SCH 80(S) Welding Neck/ Plate/ Socket weld/ Threaded/ Lap Joint FlangeANSI B16.47 ... 2573 PN 6 and DIN 2576 PN10 Slip on Welding Flanges, DIN 2631 PN6, DIN 2632 PN10, DIN ... H Flanges7) GOST 12820-80/GOST 12821-80 Flanges Sealing Surface: FF, RF, LJ, TG, MF, M and ...