... :2000,QS-2000 4)standard:DIN,ASME,API .specificationsForged Steel Flanges:(1).ASME/ANSI B16.5 : WELDING NECK FLANGE, SLIP-ON ... , 300, 400 , 600 , 900(3). ASME/ANSI B16.36 : (ORIFICE FLANGES) WELDING NECK FLANGE, SLIPON FLANGE, THREADED FLANGE.Pressure Class :2000Psi ...