... " to 64" 3,Standard: ANSI,DIN,BS etc. Integral flange Production standard: GB/T9112~9124-2000 JB/T81-94 ... Slip on Flanges, Threaded Flanges, Socket Welding Flanges, Blind Flanges, Orifice Flanges, Lap Joint Flanges, Ring Joint Flanges, Long Welding Neck ... Class: 150LB 300LB 600LB 900LB 1500LB 2500LB Classification of type: 1,PL SO WN SW TH PJ/RJ PJ ... steel cases or as customer’s request. Integral flange