api 5000Pressure Rating:- API 6BX-2000 PSI WP (With BX type Ring Gasket) Nominal Size B Flange Thickness T Hub Diameter J1 Groove Depth E Added Hub Thickness J4 263⁄ 4 30 4.97 5.28The Api 5000 Flanges are manufactured using carbon steel or alloy steel, and they help to join pipes or block a section of the piping system. Api 10000 instrument flanges is of ring type joint