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
Process
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Jun 2026
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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
๐จ Air Receiver (12 bar)
๐ข๏ธ LPG Storage Bullet (18 bar)
๐งช 316L Reactor (6 bar)
โจ๏ธ Steam Drum (35 bar)
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
๐ Output Summary
Cylindrical Shell Minimum Required Thickness
tmin = 21.40 mm
Selected Nominal Plate: 25.00 mm (โ
ADEQUATE)
MAWP = 21.48 bar(g)
2:1 Ellipsoidal Head Thickness
21.28 mm
ASME UG-32(d)
ASME Torispherical Head Thickness
35.36 mm
Standard F&D Knuckle
Hemispherical Head Thickness
12.14 mm
UG-32(f) (Half shell thk)
Calculated Hoop Stress
115.6 MPa
Allowable S = 138 MPa
๐ Required Shell Thickness vs Internal Pressure
๐ 2:1 Ellipsoidal Head Thickness vs Vessel Diameter
================================================================= THERMOFLUIDCALC โ ASME SECTION VIII DIV 1 SIZING REPORT ================================================================= Case Title : High-Capacity LPG / Propane Storage Bullet Design Pressure (P) : 18.00 bar(g) (1.800 MPa) Inside Diameter (D) : 2800.0 mm (Radius R = 1400.0 mm) Material Specification : Carbon Steel SA-516 Gr 70 Allowable Stress (S) : 138.0 MPa Joint Efficiency (E) : 1.00 Corrosion Allowance (CA) : 3.00 mm ----------------------------------------------------------------- Required Shell Thickness : 21.405 mm 2:1 Ellipsoidal Head Thk : 21.285 mm ASME Torispherical Head Thk: 35.364 mm Hemispherical Head Thk : 12.142 mm Nominal Selected Plate : 25.00 mm Shell MAWP Rating : 21.48 bar(g) (2.148 MPa) Hoop Stress at Design P : 115.63 MPa =================================================================
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.