... )certificate:ISO9001:2000,QS-2000 4)standard:DIN,ASME,API THREAD FLANGE specifications Forged Steel Flanges:(1).ASME/ANSI B16.5 ... :300, 400 , 600 , 900(6).API 6A :WELDING NECK FLANGE, THREAD FLANGE,BLIND FLANGE.Pressure :2000Psi, 3000Psi, 5000Psi, 10000Psi, 15000Psi, 20000Psi ...