... )standard:DIN,ASME,API .specificationsForged Steel Flanges:(1).ASME/ANSI B16.5 : WELDING NECK FLANGE, SLIP-ON FLANGE, BLIND FLANGE, ... : 150, 300, 400 , 600 , 900, 1500 , 2500(2).ASME/ANSI B16.47(SERIES A & B) : WELDING NECK FLANGE, BLIND FLANGE.Pressure Class ... :2000Psi, 3000Psi, 5000Psi, 10000Psi, 15000Psi, 20000Psi, 25000Psi (4).ASTM/ANSI B16.48:( Figure-8 blanks)Pressure Class :150, 300, 400 , 600 ...