Engineering disclaimer. Implements published ASME/API formulas for preliminary screening and learning only. Material allowables, flange ratings and external-pressure A/B factors are user inputs or a labelled representative subset, not the complete (copyrighted) code tables. Results are uncertified, are not a substitute for validated software, and must be independently verified and sealed by a licensed Professional Engineer against the governing code edition before any design, fabrication, inspection or safety decision.

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Pressure-equipment integrity, calculated in your browser.

A fast, fully-offline mechanical-integrity workspace: shell & head thickness, MAWP & hydrotest, UG-37 nozzle reinforcement, UG-28 external pressure, flange ratings, bolt torque, pipe spans, API 520 relief-valve sizing, API 521 fire case with wetted-geometry, RP 14E erosion, plus corrosion / remaining-life and FFS screening. No installs, no logins, nothing leaves the device.

UG-27/32UG-37 nozzleUG-28 ext.P B16.5App-2 boltsAPI 520/521RP 14E API 510/579Zero-dependency

Session Integrity Scorecard

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Cylindrical Shell — Internal Pressure

ASME VIII Div 1, UG-27(c)(1)

Inputs▾

Design pressure P (psi)

Inside radius R (in)

Allowable S (psi)

Joint eff. E

Corr. allow. (in)

Nominal thickness (in)

t = P·R/(S·E−0.6P) · MAWP = S·E·t/(R+0.6t)

Results

Enter inputs.

⊛ Rule-Based Integrity Advisor

Formed Head — Internal Pressure

ASME VIII Div 1, UG-32

Inputs▾

Head type

Pressure P (psi)

Inside dia. D (in)

Allowable S (psi)

Joint eff. E

Corr. allow. (in)

Nominal thickness (in)

t = P·D/(2SE−0.2P)

Results

Enter inputs.

⊛ Rule-Based Integrity Advisor

Nozzle Reinforcement — Area Replacement

ASME VIII Div 1, UG-37 / UG-40 · radial nozzle in cylindrical shell, internal pressure, corroded.

Inputs▾

Design pressure P (psi)

Shell inside radius R (in)

Shell nom. thk t (in)

Shell allow. Sv (psi)

Nozzle OD (in)

Nozzle wall tn (in)

Nozzle allow. Sn (psi)

Corr. allowance (in)

Outer weld leg (in)

Pad OD Dp (in)

Pad thk te (in)

Pad allow. Sp (psi) if pad used

A = d·tr + 2·tn·tr(1−fr₁) · need ΣA(avail) ≥ A

Results & diagram

Enter inputs.

⊛ Rule-Based Integrity Advisor

External Pressure & Vacuum Collapse

ASME VIII Div 1, UG-28 / UG-29. A (Fig G) & B (material chart) are copyrighted — read from the code and enter; elastic region auto.

Inputs▾

Geometry

External design pressure P (psi) vacuum ≈ 14.7

Outside dia Do (in)

Thickness t (corroded, in)

Length between supports L (in)

Modulus E at temp (psi)

Factor A (from Fig G)

Factor B (material chart, psi) blank ⇒ elastic formula

elastic: Pa=2AE/(3·Do/t) · else Pa=4B/(3·Do/t)

Ring spacing Ls (in)

Ring area As (in²)

Results

Enter geometry.

⊛ Rule-Based Integrity Advisor

Governing MAWP & Hydrotest

UG-99(b): 1.3·MAWP·(S_test/S_design)

Component MAWPs (psi)▾

Shell MAWP

Head MAWP

Other (nozzle/flange limit)

S at test temp

S at design temp

Results

Enter a component MAWP.

⊛ Rule-Based Integrity Advisor

Flange Pressure–Temperature Rating

ASME B16.5 · representative subset, interpolated. Verify vs current edition.

Inputs▾

Material group

Flange class

Units

Temperature

Operating pressure optional check

Results

Select group/class/temp.

⊛ Rule-Based Integrity Advisor

Flange Bolt Load, Torque & Gasket Seating

ASME VIII Div 1, Appendix 2 (simplified).

Inputs▾

Design pressure P (psi)

Gasket reaction dia G (in)

Gasket factor m

Seating stress y (psi)

Eff. seat width b (in)

# bolts n

Bolt nom. dia (in)

Bolt stress area each (in²)

Sb @temp (psi)

Sa @amb (psi)

Nut factor K 0.20 dry · 0.16 lubed · 0.12 anti-seize

Wm1=0.785G²P+2bπGmP · Wm2=πbGy · T=K·d·F_bolt

Results

Enter flange data.

⊛ Rule-Based Integrity Advisor

Pipe Support Span

ASME B31.1 suggested-spacing basis · US units.

Inputs▾

Pipe OD (in)

Wall (in)

Fluid density (lb/ft³)

Insulation (lb/ft)

Allow. stress (psi)

Defl. limit (in)

Modulus E (psi)

Results

Enter pipe geometry.

⊛ Rule-Based Integrity Advisor

Erosional Velocity

API RP 14E: V_e = C/√ρ_m

Inputs▾

C-factor

Mixture density ρ (lb/ft³)

Actual velocity (ft/s) or compute below

Flow (ft³/s) opt.

Pipe ID (in) opt.

Results

Enter density.

⊛ Rule-Based Integrity Advisor

Pressure-Relief Valve Sizing

API 520 Part I · vapor / steam / liquid · backpressure & bellows.

Inputs▾

Service

Valve type

Flow W (lb/hr)

Mol. wt M

Temp (°F)

k=Cp/Cv

Set pressure (psig)

Overpressure %

Superimposed BP (psig)

Built-up BP (psig)

Kb (capacity correction) read from API 520 fig; 1.0 if none

A = W·√(TZ/M)/(C·Kd·P1·Kb·Kc)

Results

Enter conditions.

⊛ Rule-Based Integrity Advisor

Fire-Case Relief Load & Wetted Geometry

API 521 §4.4.13.2.4

Wetted-area geometry▾

Orientation

Diameter D (ft)

Tan/tan length L (ft)

Liquid level / depth (ft)

wetted ≤ 25 ft elevation per API 521

Fire inputs▾

Drainage / firefighting

Environment factor F

Latent heat λ (Btu/lb)

Results

Enter geometry.

⊛ Rule-Based Integrity Advisor

Heat-Exchanger Tube Rupture — Screening

API 521 exemption screening only — not a full relief design.

Inputs▾

High-side design P (psig)

Low-side design P (psig)

Low-side hydrotest P (psig) opt.

Results

Enter pressures.

⊛ Rule-Based Integrity Advisor

Corrosion Rate, Remaining Life & Inspection Interval

API 510 / 570 basis.

Inputs▾

Initial thickness (in)

Current thickness (in)

Required t_min (in)

Service age (yr)

Max interval cap (yr) code limit

Results

Enter thicknesses.

⊛ Rule-Based Integrity Advisor

Fitness-for-Service — Level 1 General Metal Loss

API 579-1 / ASME FFS-1, Part 4 screening only.

Inputs▾

Min. measured t_mm (in)

Required t_min (in)

Future corr. allow. FCA (in)

Nominal t (in)

Design P (psi)

Inside radius R (in)

S (psi)

E joint

Results

Enter thicknesses.

⊛ Rule-Based Integrity Advisor

Project Registry, Attachments & Audit Log

Stored locally in this browser. Use Export/Import to move between machines.

Saved projects

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Attachments

⬆ Drag & drop files here, or click to browse

Audit log

Actions will appear here.

About & honest limits

Implemented & verifiable

UG-27/32 shell & head, MAWP, UG-99(b) hydrotest
UG-37 nozzle reinforcement (+ pad sizing, SVG)
UG-28/29 external pressure & stiffening rings
B16.5 P-T rating (subset, metric option)
App-2 bolt load, torque, gasket seating
API 520 vapor / steam (Napier) / liquid + backpressure & bellows
API 521 fire case with wetted-geometry engine
RP 14E erosion · API 510/579 corrosion, life & FFS-L1
Registry, revisions, audit log, attachments
PDF report, hydrotest cert, U-1A sheet, Excel & CSV
Optional WebCrypto password encryption of JSON

What it is NOT (read this)

Not certified / code-stamped. The "audit log" records your actions; it does not make output audit-ready.
The advisor is a transparent rules checker, not black-box AI.
It does not reproduce the complete copyrighted ASME II-D / B16.5 tables — enter your project allowables.
UG-28 needs A & B factors read from ASME's copyrighted charts (you input them).
Tube-rupture and FFS modules are screening only.
PDF uses the browser print engine and Excel uses SpreadsheetML — deliberately, to keep zero-dependency/offline (jsPDF/SheetJS add ~1 MB).

Every result must be checked and sealed by a licensed PE before use.

ASME Guard™ Ultimate v6.0 · AIEnginear.com · 100% offline, no data leaves your device.

ASME® / API® are marks of their owners. Independent, uncertified tool.