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Heat Loss from Oil Pipes

Heat loss in W/mK and Btu/hr ft oF from oil tubes ranging temperatures 10 - 38oC (50 - 100oF)

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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

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