SS316 flange 1.certificate:ISO9001,ABS,BV 2.material:ss202,304,304l, ... size3/8''~160''TypeLap-Joint Flange (LJ), Socket-welded Flange (SW), Slip-on Flange (SO), Welding-Neck Flange (WN), Threaded Flange (TH), etc.American SeriesCLASS ... 25, PN 40, PN 63, PN 100, PN 160, PN 250, PN 320, PN 400StandardHG20592, ASME16.5-2009, DIN2633, ANSI, JIS ...