๐ก๏ธ ASME Pressure Vessel (Sec VIII)
Calculate ASME Section VIII Div 1 cylindrical shell thickness (UG-27), 2:1 ellipsoidal, torispherical, hemispherical heads, and MAWP rating.
โก Fortran 90 Engine
Double Precision (IEEE 754)
โ ISO / ASME Validated
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Jun 2026
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Hardware & Sizing Partner: Need to size a control valve or check ASME flange bolt torque for this line?
๐ก๏ธ ASME Section VIII Div 1 Vessel Stress Profile & Head Geometry
Real-time visual 3D cutaway of shell hoop stress & 2:1 ellipsoidal formed dish๐ Configuration & Presets
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ASME Sec VIII Div 1 Formulations:
โข Shell (UG-27): t = (P ยท R) / (S ยท E โ 0.6 P) + CA
โข 2:1 Ellipsoidal (UG-32): t = (P ยท D) / (2 S ยท E โ 0.2 P) + CA
โข ASME Torispherical: t = (0.885 P ยท D) / (S ยท E โ 0.1 P) + CA
โข Shell MAWP: Pmax = (S ยท E ยท tcorr) / (R + 0.6 tcorr)
โข Shell (UG-27): t = (P ยท R) / (S ยท E โ 0.6 P) + CA
โข 2:1 Ellipsoidal (UG-32): t = (P ยท D) / (2 S ยท E โ 0.2 P) + CA
โข ASME Torispherical: t = (0.885 P ยท D) / (S ยท E โ 0.1 P) + CA
โข Shell MAWP: Pmax = (S ยท E ยท tcorr) / (R + 0.6 tcorr)
๐ Pressure Vessel Sizing Results
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๐ Calculation Methodology & ASME Standards
ASME UG-27 Shell Calculations
Calculates minimum thickness to resist circumferential hoop stress and longitudinal stress under internal pressure with corrosion allowance:
t = (P ยท R) / (S ยท E โ 0.6 P) + CA
Formed Heads Geometry (UG-32)
2:1 semi-ellipsoidal heads provide superior membrane stress distribution compared to torispherical flanged and dished heads.
Key Engineering Assumptions
- Thin-wall cylinder assumption ($t \le 0.5 R$ or $P \le 0.385 S E$).
- Weld joint efficiency $E$ based on radiography testing (UW-11 / UW-12).
- MAWP evaluated in the fully corroded condition.