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Cast Valve Body Wall Thickness

Estimate the minimum wall thickness of a cast valve body (e.g. gate, globe, check, ball) using design pressure, bore size and the casting quality factor. Based on ASME B16.34 / MSS-SP methodology commonly used for valve body wall checks.

⚙ ASME B16.34 / MSS Cast steel / iron bodies Design pressure basis

Cast valve body wall thickness measurement

🔗 About This Calculation

For cast valve bodies, the minimum wall thickness depends on the design pressure, the internal bore, the material allowable stress and a casting quality factor (E) that accounts for typical porosity in cast components. The simplified formula below is widely used for body wall checks when no detailed FEA is available.

t = (P · D) / (2 · S · E − 1.2 · P) + C

Where: P = design pressure, D = bore diameter, S = allowable stress, E = casting quality factor (0.80–1.00), C = corrosion allowance.

🔧 What the Calculator Will Compute

Minimum required wall thickness for the cast body.
Pressure rating comparison against ASME B16.34 class.
Casting quality factor adjustment for different processes.
Optional corrosion allowance input for service life.

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