... design. Carbon Steel Swivel Ring Flange Type Weld Neck,Slip-On,Blind,Socket Weld,Lap Joint,Threaded,Orifice Flange,Swivel ... HUB BLIND FLANGE, SOCKET WELD FLANGE.LAPJOINT FLANGE, THREADED FLANGE. RING TYPE JOINT FLANGE.Pressure Class : 150, 300, 400 , 600 , 900 ... FLANGE, BLIND FLANGE.Pressure Class :300, 400 , 600 , 900* API 6A : WELDING NECK FLANGE, THREAD FLANGE,BLIND FLANGE.Pressure : 2000Psi, ...