Description
Pipe Thickness ASME B31.3 Calculation
Engineering Spreadsheet — Instant Download
What This Spreadsheet Does
Calculates required pipe wall thickness for process piping per ASME B31.3 paragraph 304.1 — the foundational calculation every piping engineer does on every line in every project. Outputs both minimum thickness (t) and nominal thickness (t_nom) including corrosion allowance and mill tolerance.
What’s Inside the Excel File
- Inputs — design pressure, temperature, pipe OD, material allowable stress (S), weld joint quality factor (E), Y coefficient, corrosion allowance, mill tolerance
- Minimum thickness (t) per B31.3 Eq. (3a)
- Pressure design thickness ™ with mechanical allowances
- Required thickness with mill tolerance (T)
- Nominal thickness selection from standard pipe schedules
- Pressure rating at selected schedule
- Equation 3a vs 3b selection for high-temperature service
Who This Is For
- Piping design engineers in process industries
- Mechanical engineers on Oil & Gas, refinery, petrochemical projects
- EPC piping teams
- Stress analysts verifying line schedules
Codes & Standards Referenced
- ASME B31.3 — Process Piping
- ASME B31.3 Paragraph 304.1 — Straight Pipe Under Internal Pressure
How It Works
| 1 | Purchase — secure payment |
| 2 | Download — instant Excel access |
| 3 | Enter Values — design conditions and material data |
| 4 | Get Results — required thickness with schedule selection |
File Format & Compatibility
Microsoft Excel (.xlsx). Opens in Excel 2016+, Excel 365, Google Sheets. No macros, no locked cells.
What You Get After Payment
- ✅ Instant download (also emailed)
- ✅ Lifetime access
- ✅ Engineer email support
- ✅ 7-day refund if file fails to open
🌍 Trusted by engineers across 50+ countries · 📚 Part of 160+ engineering spreadsheets · 🛠 Support from qualified engineers
Frequently Asked Questions
B31.3 only or other codes?
This sheet is B31.3 process piping. For UK gas distribution, see our IGEM TD-13 sheet. For pipelines, see our pipe thickness sheets for B31.4/B31.8.
External pressure / vacuum?
This sheet covers internal pressure. External pressure / vacuum collapse requires a different formulation.
Custom version needed?
Request a custom quote.
Reviews
There are no reviews yet.