Description
Line Sizing & Pressure Drop Calculation
Engineering Spreadsheet — Instant Download
What This Spreadsheet Does
Sizes process piping and calculates frictional pressure drop using the Darcy-Weisbach equation with the Moody friction factor (Colebrook-White correlation). Handles single-phase liquid and gas services across a wide Reynolds number range.
What’s Inside the Excel File
- Inputs — fluid properties (density, viscosity), flow rate, pipe ID, pipe roughness, length, fittings K-values
- Reynolds number calculation
- Friction factor via Colebrook-White (iterative solution embedded)
- Straight-pipe pressure drop per Darcy-Weisbach
- Fittings pressure drop via equivalent length or K-method
- Total system ΔP with breakdown
- Velocity check against erosional/noise limits
Who This Is For
- Process and piping engineers
- Hydraulic system designers
- EPC piping teams across Oil & Gas, water, chemical, HVAC
- Plant operations engineers troubleshooting line capacity
Codes & Standards Referenced
- Darcy-Weisbach equation
- Colebrook-White friction correlation / Moody diagram
- Crane TP-410 — Flow of Fluids principles
How It Works
| 1 | Purchase — secure payment |
| 2 | Download — instant Excel access |
| 3 | Enter Values — fluid, pipe, flow, fittings |
| 4 | Get Results — ΔP, velocity, friction factor |
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
Two-phase flow?
Single-phase only. For two-phase, see our Two-Phase Flow Pressure Drop sheet.
Compressible gas effects?
The sheet handles low Mach number gas flow accurately. For high Mach / choked flow, request a custom version.
Custom version needed?
Request a custom quote.
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