ANSI b16.5 150 LBS screwed flange 1) material :stainless steel 2) standard ... Welding-Neck Flange (WN), Threaded Flange (TH), etc.American SeriesCLASS 150, CLASS 300, CLASS 400, CLASS 600, CLASS 900, CLASS ... PN 160, PN 250, PN 320, PN 400StandardHG20592, ASME16.5-2009, DIN2633, ANSI, JIS, etcMaterialA234-WPB.A420-WPL6.A234- ... 600/900 stainless steel forged screwed flange ANSI b16.5 150 lbs screwed flange