... .5 : WELDING NECK FLANGE, SLIP-ON FLANGE, BLIND FLANGE,HIGH HUB BLIND FLANGE, SOCKET WELD FLANGE.LAPJOINT FLANGE, THREADED FLANGE. ... 48:( Figure-8 blanks)Pressure Class :150, 300, 400 , 600 , 900,1500, 2500(5).MSS SP44 :WELDING NECK FLANGE, BLIND FLANGE. ... 600 , 900(6).API 6A :WELDING NECK FLANGE, THREAD FLANGE,BLIND FLANGE.Pressure :2000Psi, 3000Psi, 5000Psi, 10000Psi, 15000Psi, 20000Psi, 25000Psi ...