Forged Carbon Steel Flange: Welding Neck, Slip-on, Blind, Plate ANSI ... DIN2633, ISO 7005-1 ISO TUV Certificate Forged Carbon Steel Flange:Welding Neck Flanges, Slip-on Flanges, Blind , Plate ... BS FlangesSTANDARD: BS 4504, BS3293PRESSURE GRADE:PN2.5,PN6,PN10,PN16,PN25,PN40 4. ISO Flanges STANDARD: ISO 7005 ... -1PRESSURE GRADE:PN2.5,PN6,PN10,PN16,PN25,PN40,PN50,PN110,PN150, PN260,PN420 ...