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Blind Flange Calculator

Web utility - EN 13445-3 blind flange sizing

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About this tool

Enter DN, operating and test pressure, temperature, material, and corrosion allowance. The calculator selects the nearest PN class from EN 1092-1, computes minimum thickness per EN 13445-3, and recommends a standard plate thickness with a weight estimate.

EN 13445-3EN 1092-1Flanges

Runs entirely in the browser. Validate final flange sizing, bolt loads, and gasket selection against project specs.

Key actions

Automatic PN selection from operating pressure
Minimum and recommended thickness outputs
Bolt circle data and weight estimate

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