... , 900LBS,1500LBS, 2500LBS) Blind/ Slip-on/SCH 10(S),SCH 40(S), STD,SCH 80(S) Welding Neck/ Plate/ Socket weld/ Threaded/ Lap ... Blind/Weld Neck Flanges2) DIN 2527 (PN6, PN10, PN16 PN25, PN40, PN64, PN100) Blank Flange, DIN 2573 PN 6 and DIN 2576 PN10 ... /GOST 12821-80 FlangesSealing Surface: FF, RF, LJ, TG, MF, M and R.T.J. (RJ). EN1092-1 11B WNRF Flanges