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Oil Pipes - Heat Loss

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Heat loss from oil pipes are indicated below:

Oil Pipes - Heat Loss
W/mK
(Btu/hr ft oF)
Nominal bore
mm
Oil Temperature
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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