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Pipe fitting minor-loss table
Combine fitting loss coefficients on one velocity basis.
A clear answer. Here’s how.
Adds K×count across up to 200 components, then computes head loss=ΣK·V²/(2g) and pressure loss=ρΣK·V²/2. Counts are non-negative whole numbers. Every coefficient must use the same supplied reference velocity; this does not translate coefficients across changing pipe sizes or infer coefficients from a fitting name.
See a worked example
Worked example
A fixed demonstration, separate from the values you enter above.
- CSV: Component,K,Count
Component,K,Count Elbow,0.9,4 Valve,0.2,1
- Reference speed for every K (m/s)
- 2
- Fluid density (kg/m³)
- 1000
Example result
| Component | K per item | Count | Total K |
|---|---|---|---|
| Elbow | 0.9 | 4 | 3.6 |
| Valve | 0.2 | 1 | 0.2 |
Combined K=3.8000000000000003; head loss 0.7749843218632255 m; pressure loss 7.6 kPa. Every K must refer to the same supplied velocity basis.