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Engineering ToolBox > Heat Emission from Pipes Submerged in Oil or Fat
The viscosity of a fluid has considerable influence on the heat transfer from a submerged heating pipe. Be aware that the viscosity of a fluid is highly dependent on the temperature.
The table below can be used to indicate the heat emission from a steam pipe submerged in an oil bath .
| Application | Fluid | Heat Emission from coil surface | |
| (Btu/ft2 hr oF) | W/m2 oC | ||
| Steam coil with medium steam pressure and natural convection of oil | Light Oils | 30 | 170 |
| Heavy Oils | 15 - 20 | 85 - 115 | |
| Fats | 5 - 10 | 30 - 60 | |
| Steam coil with medium pressure and forced convection of oil | Light Oils | 100 | 570 |
| Heavy Oils | 60 | 340 | |
| Fats | 30 | 170 | |