... , Blind, Plate flange ANSI B16.5, BS4504, DIN2633, EN1092-1 ISO TUV Certificate Forged Steel Flange:Welding Neck Flanges, Slip-on Flanges, Blind ... GRADE:PN2.5,PN6,PN10,PN16,PN25,PN40 5. ISO Flanges STANDARD: ISO 7005-1PRESSURE GRADE:PN2.5,PN6,PN10,PN16,PN25 ...