Heat Loss of Uninsulated Copper Tubes

Heat loss from uninsulated copper pipes ranging 1/2 - 4 inches

Heat loss from 1/2" to 4" copper pipes or tubes at various temperature differences between the pipe and the surrounding air, are indicated in the diagram and table below:

heat loss diagram uninsulated copper tube

Nominal boreHeat loss for the fluid inside pipe
(W/m)
Heat loss for the fluid inside pipe
(Btu/hr ft)
Temperature difference (oC)Temperature difference (oF)
(mm) (inches) 22 38 55 40 68 99
15 1/2 21 32 45 22 34 47
22 3/4 28 43 60 29 45 64
28 1 34 53 76 36 56 79
35 1 1/4 41 64 89 43 67 93
42 1 1/2 47 74 104 49 77 108
54 2 59 93 131 62 97 136
67 2 1/2 71 111 156 74 116 162
76 3 83 129 181 87 135 189
108 4 107 165 232 111 172 241

Related Topics

  • Heat Loss and Insulation - Heat loss from pipes, tubes and tanks - with and without insulation - foam, fiberglass, rockwool and more
  • Insulation - Heat transfer and heat loss from buildings and technical applications - insulation methods and coefficients to reduce energy consumption

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