Sealing type SO WN PL TH SW Standard: ASME, ANSI, API, JIS, JPI, DIN, UNI, BS, AS Material: A105, ... Neck Flange, Socket Welding Flange, Threaded Flange, Lap Joint Flange, Blind Flange and other kinds of special flanges. ... ASME B16.5,ASME B16.48,ASME B16.47,API 590China:GB/T9112~GB/T9124-2000,GB/T2506- ... round bar,CNC machining,Drilling and Passivating high quality Stainless steel flange, 150~1500class