Copper Pipes - Heat Loss

Heat loss from copper tubes at various temperature differences between tube and air

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Values from the table below can be used to indicate the heat losses from uninsulated copper pipes:

Nominal bore Heat loss for fluid inside pipe
(W/m) (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 53
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

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Related Topics

  • Heat Loss and Insulation - Heat loss from pipes, tubes and tanks - with and without insulation - foam, fiberglass, rockwool and more
  • Piping Systems - Dimensions of pipes and tubes - dimensions, materials, capacities - pressure drop calculations and charts - insulation and heat loss diagrams
  • Water Systems - Hot and cold water systems - design properties, capacities, sizing and more

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