... : From1/8" to 64" 3,Standard: ANSI,DIN,BS etc. Blind flange Production standard: GB/T9112~9124-2000 JB/T81-94 ... Neck Flanges, Slip on Flanges, Threaded Flanges, Socket Welding Flanges, Blind Flanges, Orifice Flanges, Lap Joint Flanges, Ring Joint Flanges, Long ... : 1,PL SO WN SW TH PJ/RJ PJ/SE LF/SE 2,FF RF M FM T G RJ(RTJ)SIZE ... with polyethylene film steel cases or as customer’s request. Blind flange