... ANSI B16.5, BS4504, DIN2633, EN1092-1 ISO TUV Certificate Forged Steel Flange:Welding Neck Flanges, Slip-on Flanges, Blind , Plate ... B16.5, ASME B16.47,ASME B16.48,ASME B16.36,ANSI/AWWA C207PRESSURE GRADE:Class150,Class300,Class600,Class900,Class1500,Class2500MATERIAL ... ,PN6,PN10,PN16,PN25,PN40,PN50,PN110,PN150, PN260,PN420 Forged Carbon Steel Flange