... 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, DIN, JIS, BS ...