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Engineering ToolBox > Heat Loss from Oil Pipes
The table below can be used to indicate the heat loss from oil pipes.
| Heat Loss (W/mK) (Btu/hr ft oF) | Oil Temperature | ||
| Nominal bore mm | up to 10 oC up to 50 oF | 10 - 27 oC 50 - 80 oF | 27 - 38 oC 80 - 100 oF |
| 15 | 0.7 0.4 | 0.9 0.5 | 0.9 0.5 |
| 20 | 0.7 0.4 | 1.1 0.6 | 1.1 0.6 |
| 25 | 0.8 1.4 | 1.2 0.7 | 1.4 0.8 |
| 40 | 2.1 1.6 | 1.7 1.0 | 1.9 1.1 |
| 50 | 2.8 1.6 | 2.1 1.2 | 2.2 1.3 |