... FLANGE, SOCKET WELD FLANGE. LAPJOINT FLANGE, THREADED FLANGE. RING TYPE JOINT FLANGE. Pressure Class: 150, 300, 400, 600, 900, 1500, ... (ORIFICE FLANGES) WELDING NECK FLANGE, SLIPON FLANGE, THREADED FLANGE. Pressure Class: 300, 400, 600, 900, 1500, 2500 ASTM/ANSI ... 900 API 6A: WELDING NECK FLANGE, THREAD FLANGE, BLIND FLANGE. Pressure: 2000Psi, 3000Psi, 5000Psi, 10000Psi, 15000Psi, 20000Psi, 25000Psi 5. ...