Pipe Fittings: Elbow, 45°, mitered, 2 welds, (22.5°) to Elbow, 90°, (r/D = 6)
Pipe fittings loss coefficients — Darby 3K method K-factors for elbows, tees, valves, and other fittings
| fitting type | K1 (dimensionless) | K ref (dimensionless) | Kd (dimensionless) | Ki (dimensionless) | category | description |
|---|---|---|---|---|---|---|
| Elbow, 45°, mitered, 2 welds, (22.5°) | 500 | 0.225948 | 4 | 0.052 | Elbow | Darby 3K: K = 500.0/Re + 0.052*(1 + 4.0/D^0.3) |
| Elbow, 45°, threaded standard, (r/D = 1) | 500 | 0.318214 | 4.2 | 0.071 | Elbow | Darby 3K: K = 500.0/Re + 0.071*(1 + 4.2/D^0.3) |
| Elbow, 90°, (r/D = 2) | 800 | 0.241396 | 3.9 | 0.056 | Elbow | Darby 3K: K = 800.0/Re + 0.056*(1 + 3.9/D^0.3) |
| Elbow, 90°, (r/D = 4) | 800 | 0.283074 | 3.9 | 0.066 | Elbow | Darby 3K: K = 800.0/Re + 0.066*(1 + 3.9/D^0.3) |
| Elbow, 90°, (r/D = 6) | 800 | 0.33886 | 4.2 | 0.075 | Elbow | Darby 3K: K = 800.0/Re + 0.075*(1 + 4.2/D^0.3) |
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