API flange standard and API 6A 500010000 Blind Flange
api 5000ab sciex api 5000,,,api 5000.Pressure 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 5.28