Flange Dimensions Reference

ASME B16.5 (NPS 1/2" – 24"), B16.47 Series A (NPS 26" – 60"), and EN 1092-1 Type 11 welding-neck (DN 10 – DN 600) raised-face flange dimensions. ASME pressure classes 150, 300, 600, 900, 1500, 2500; EN pressure classes PN 6, 10, 16, 25, 40. Each entry shows: outside diameter, flange thickness, raised-face OD, bolt circle diameter, bolt count, bolt thread, and bolt hole size.

These dimensions are needed to specify flanges, gaskets, and bolting; to verify mating compatibility between equipment from different vendors; and to confirm clearance for installation and bolt access.