... NECK FLANGE, SLIP-ON FLANGE, BLIND FLANGE,HIGH HUB BLIND FLANGE, SOCKET WELD FLANGE.LAPJOINT FLANGE, THREADED FLANGE. RING TYPE JOINT FLANGE.Pressure Class ... ANSI B16.47(SERIES A & B) : WELDING NECK FLANGE, BLIND FLANGE. Pressure Class : 75, 150, 300, 400 , 600 ... WELDING NECK FLANGE, BLIND FLANGE.Pressure Class :300, 400 , 600 , 900* API 6A : WELDING NECK FLANGE, THREAD FLANGE,BLIND FLANGE.Pressure : ...