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90-Degree Elbow Pressure Drop Table (Water, Standard Conditions)
| Pipe Diameter (inches) | Flow Rate (gpm) | Velocity (ft/s) | Reynolds Number (Re) | Friction Factor (f) | Pressure Drop (psi) |
|---|
| 1 | 10 | 3.14 | 31,400 | 0.024 | 0.28 |
| 1 | 20 | 6.28 | 62,800 | 0.023 | 1.11 |
| 2 | 20 | 1.57 | 31,400 | 0.025 | 0.07 |
| 2 | 40 | 3.14 | 62,800 | 0.024 | 0.28 |
| 3 | 50 | 1.47 | 48,700 | 0.025 | 0.18 |
| 3 | 100 | 2.94 | 97,400 | 0.023 | 0.71 |
| 4 | 80 | 1.63 | 65,300 | 0.025 | 0.28 |
| 4 | 160 | 3.26 | 130,600 | 0.022 | 1.12 |
| 6 | 200 | 1.44 | 106,000 | 0.023 | 0.64 |
| 6 | 400 | 2.88 | 212,000 | 0.021 | 2.55 |
| 8 | 300 | 1.22 | 138,000 | 0.024 | 0.71 |
| 8 | 600 | 2.45 | 276,000 | 0.021 | 2.84 |
| 10 | 400 | 1.05 | 170,000 | 0.024 | 0.78 |
| 10 | 800 | 2.10 | 340,000 | 0.020 | 3.12 |