ThermoFluidCalc Engineering Report

ASME Section VIII Div 1 Pressure Vessel Sizing — 2026-08-23 20:58:57
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🛡️ 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.

⚡ Fortran 90 Engine Double Precision (IEEE 754) ✓ ISO / ASME Validated
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⚡ Calculs faits 33
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📅 Mise en service Jun 2026
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🛡️ ASME Section VIII Div 1 Vessel Stress Profile & Head Geometry

Real-time visual 3D cutaway of shell hoop stress & 2:1 ellipsoidal formed dish

📝 Configuration & Presets

💨 Air Receiver (12 bar) 🛢️ LPG Storage Bullet (18 bar) 🧪 316L Reactor (6 bar) ♨️ Steam Drum (35 bar)
📐 Geometry & Design Pressure
🛡️ Material & Weld Joint Efficiency
📏 Nominal Selected Shell Plate
Used to verify MAWP rating margin
ASME Sec VIII Div 1 Formulations:
• Shell (UG-27): t = (P · R) / (S · E − 0.6 P) + CA
• 2:1 Ellipsoidal (UG-32): t = (P · D) / (2 S · E − 0.2 P) + CA
• ASME Torispherical: t = (0.885 P · D) / (S · E − 0.1 P) + CA
• Shell MAWP: Pmax = (S · E · tcorr) / (R + 0.6 tcorr)

📊 Pressure Vessel Sizing Results

📊 Output Summary
💾 Fortran Source

Cylindrical Shell Minimum Required Thickness
tmin = 26.18 mm
Selected Nominal Plate: 32.00 mm (✅ ADEQUATE)
MAWP = 43.62 bar(g)
2:1 Ellipsoidal Head Thickness 25.88 mm ASME UG-32(d)
ASME Torispherical Head Thickness 43.50 mm Standard F&D Knuckle
Hemispherical Head Thickness 14.44 mm UG-32(f) (Half shell thk)
Calculated Hoop Stress 110.7 MPa Allowable S = 138 MPa

📈 Required Shell Thickness vs Internal Pressure

📉 2:1 Ellipsoidal Head Thickness vs Vessel Diameter

=================================================================
 THERMOFLUIDCALC — ASME SECTION VIII DIV 1 SIZING REPORT
=================================================================
Case Title                 : High-Pressure Steam Boiler Separation Drum
Design Pressure (P)        : 35.00 bar(g) (3.500 MPa)
Inside Diameter (D)        : 1800.0 mm (Radius R = 900.0 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   : 26.179 mm
2:1 Ellipsoidal Head Thk   : 25.884 mm
ASME Torispherical Head Thk: 43.505 mm
Hemispherical Head Thk     : 14.442 mm
Nominal Selected Plate     : 32.00 mm
Shell MAWP Rating          : 43.62 bar(g) (4.362 MPa)
Hoop Stress at Design P    : 110.72 MPa
=================================================================

📘 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 · R) / (S · E − 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.