How It Works
+Quick Select - Common Applications
Pressure Vessel Calculator
Calculate hoop and longitudinal stresses in cylindrical pressure vessels per ASME Section VIII.
ASME Design Parameters
mm
✓
Design Acceptable
Wall thickness meets ASME requirements
Stress Analysis Results
Hoop Stress
--
Longitudinal Stress
--
Von Mises Equivalent
--
r/t Ratio
--
Safety Factor
--
ASME Design Results
Required Thickness (min)
--
With Corrosion Allowance
--
MAWP (given thickness)
--
Thickness Comparison
Required:
--
Actual:
--
Reference Formulas
Thin Wall Hoop Stress:
σh = P·r / t
ASME Required Thickness:
t = P·R / (S·E - 0.6·P)
MAWP:
MAWP = S·E·t / (R + 0.6·t)
Joint Efficiency (E) Reference
| Weld Type | Full RT | Spot RT | No RT |
|---|---|---|---|
| Double-welded butt | 1.0 | 0.85 | 0.70 |
| Single-welded (backing) | 0.90 | 0.80 | 0.65 |
| Single-welded (no backing) | -- | -- | 0.60 |
RT = Radiographic Testing. Values per ASME Section VIII, Division 1, Table UW-12.