... 3.Weld Neck,Slip-On,Socket Weld,Lap Joint,Threaded, Orifice flange,Swivel flange 4.OEM Service Flange Size1/2"-72 ... "TypeWeld Neck, Slip-On, Blind, Socket Weld, Lap Joint, Threaded, Orifice Flange, Swivel Flange, Spectacle Blind,Etc.StandardANSI, ASME ,MSS, API ... :75, 150, 300, 400 , 600 , 900* ASME/ANSI B16.36 : (ORIFICE FLANGES) WELDING NECK FLANGE, SLIPON FLANGE, THREADED FLANGE.Pressure Class ...