Sealing type SO WN PL TH SW Standard: ASME, ANSI, API, JIS, JPI, DIN, UNI, BS, AS Material: A105,Q235, WCB, CF8, 314.316 Type:Slip On Flange, Welding Neck Flange, Socket Welding Flange, Threaded Flange, Lap Joint Flange, Blind Flange and other kinds of special flanges.Standard:America:ASME B16.5,ASME B16.48,ASME B16.47,API 590China:GB/T9112~GB/T9124-2000,GB/T2506-1989(2005),GB/T2504-1989(2005),GB ...