Blind Flange Specifications Chart
ASME B16.5 · B16.47 Series A · B16.47 Series B
The Blind Flange Specifications Chart gives the essential dimensional data for flanges that seal the ends of piping systems, valves, and pressure vessel openings: outside diameter, thickness, bolt circle, and drilling across ASME pressure classes.
Engineers and procurement teams use these specifications to ensure a precise, leak-proof fit and structural integrity under high pressure.
Blind Flange Dimensions by Rating
ASME B16.5 (1/2" to 24") and ASME B16.47 Series A and Series B (26" to 60"). All dimensions in inches.
Weight is an estimate for SA516-Gr.70 carbon steel, calculated from flange geometry (body disc plus raised face) at 0.2836 lb/in³. Actual weights vary with alloy, facing, and coating.
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