Pressure Vessel Design Calculator
Calculate ASME Section VIII thin-wall cylinder hoop stress, longitudinal stress, and minimum required wall thickness.
Calculate Pressure Vessel
Enter your engineering design parameters to calculate real-time verified outputs.
Calculation Results
Calculated using governing formula: t = (P * r) / (S * E - 0.6 * P) + CA, sigma_hoop = (P * r) / t
Quick Summary
Free ASME Pressure Vessel Calculator. Compute hoop stress sigma = (P * r) / t, longitudinal stress, and minimum wall thickness.
How to Use the Pressure Vessel Calculator
Follow these quick steps to evaluate your engineering parameters:
- Enter your verified design values into the corresponding input fields above.
- Verify your engineering unit conventions (SI Metric / US Customary).
- Click Calculate to evaluate primary metrics and secondary performance breakdowns.
- Click Reset at any time to clear the results and reset inputs.
Governing Formulas & Engineering Theory
t = (P * r) / (S * E - 0.6 * P) + CA, sigma_hoop = (P * r) / t
ASME Boiler & Pressure Vessel Code (BPVC) formula for thin-walled cylindrical shells. Hoop stress is twice as large as longitudinal stress.
Engineering Principles & Practical Applications
Pressure vessels store gases and liquids under pressure in chemical refineries, gas storage plants, steam power boilers, and compressed air tanks.
Scope: What is Included vs. Excluded
Included Features
- High-precision 64-bit IEEE floating point computations
- Interactive form validation and instant calculation
- Standardized SI metric and imperial conversions
- Detailed secondary performance breakdowns
Non-Linear Factors Excluded
- High-order plastic deformation and material creep
- Severe environmental temperature extremes
- Extreme non-linear dynamic fatigue regimes
- Microstructural material anomalies
Engineering Tips & Best Practices
Safety Factor Application: Always apply appropriate design factors of safety (typically 1.5 to 3.0 depending on relevant ASME, AISC, or ISO building codes) when sizing critical mechanical and structural components.
Common Mistakes to Avoid
Unit Consistency: Avoid mixing imperial and metric units without standard conversion. Ensure modulus, dimensions, and force inputs match baseline SI units (Newtons, meters, Pascals).
Frequently Asked Questions
Why is hoop stress always twice the longitudinal stress?
Equilibrium geometry dictates that the projected diameter resisting hoop stress is twice the cross-sectional area resisting axial thrust.
When is a cylinder considered a thin-walled vessel?
When wall thickness t is less than one-tenth of inner radius r (t/r <= 0.1).
What is joint efficiency E?
E is a factor (typically 0.70 to 1.0) reflecting the radiographic testing grade of welded seam joints.