🛡️ 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

Process

📊 Solver Telemetry ● ACTIVE

👁️ Views 41

⚡ Solves 33

💾 Downloads 454 📦 Fortran Code 4.4 KB

📅 Released Jun 2026

⏱️ Latency < 1 ms

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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

Internal Design Pressure P [bar gauge]:

Inside Diameter D [mm]:

Design Temperature T [°C]:

Corrosion Allowance CA [mm]:

🛡️ Material & Weld Joint Efficiency

ASME Plate Material Specification:

Weld Joint Efficiency (E):

📏 Nominal Selected Shell Plate

Nominal Commercial Plate Thickness [mm]: 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: P_max = (S · E · t_corr) / (R + 0.6 t_corr)

📊 Pressure Vessel Sizing Results

📊 Output Summary
💾 Fortran Source

Cylindrical Shell Minimum Required Thickness

t_min = 5.75 mm

Selected Nominal Plate: 8.00 mm (✅ ADEQUATE)

MAWP = 8.56 bar(g)

2:1 Ellipsoidal Head Thickness 5.73 mm ASME UG-32(d)

ASME Torispherical Head Thickness 9.76 mm Standard F&D Knuckle

Hemispherical Head Thickness 3.12 mm UG-32(f) (Half shell thk)

Calculated Hoop Stress 64.4 MPa Allowable S = 108 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                 : Pharmaceutical Stainless Steel Batch Reactor
Design Pressure (P)        : 6.00 bar(g) (0.600 MPa)
Inside Diameter (D)        : 1600.0 mm (Radius R = 800.0 mm)
Material Specification     : Stainless Steel SA-240 316L
Allowable Stress (S)       : 108.0 MPa
Joint Efficiency (E)       : 0.85
Corrosion Allowance (CA)   : 0.50 mm
-----------------------------------------------------------------
Required Shell Thickness   : 5.749 mm
2:1 Ellipsoidal Head Thk   : 5.732 mm
ASME Torispherical Head Thk: 9.761 mm
Hemispherical Head Thk     : 3.116 mm
Nominal Selected Plate     : 8.00 mm
Shell MAWP Rating          : 8.56 bar(g) (0.856 MPa)
Hoop Stress at Design P    : 64.36 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.

ThermoFluidCalc Engineering Report