... )certificate:ISO9001:2000,QS-2000 4)standard:DIN,ASME,API THREAD FLANGE specifications Forged Steel Flanges:(1).ASME/ANSI B16.5 ... FLANGES) WELDING NECK FLANGE, SLIPON FLANGE, THREADED FLANGE.Pressure Class :300, 400 , 600 , 900, 1500 , 2500(4).ASTM/ANSI B16. ... FLANGE, BLIND FLANGE.Pressure Class :300, 400 , 600 , 900(6).API 6A :WELDING NECK FLANGE, THREAD FLANGE,BLIND FLANGE.Pressure :2000Psi, 3000Psi ...