Steam Pipes - Heat Losses (W/m)
Heat loss from steam pipes depends on pipe sizes, insulation qualities, steam temperatures (steam pressures) and surrounding temperatures.
The table below and figure above can be used to estimate heat loss from bare un-insulated horizontal steam pipes - still air conditions - and air temperature ranging 10oC to 25oC.
| Temperature Difference between Steam and Surrounding air (oC) | Heat Loss (W/m) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Dimension (mm) | ||||||||||
| 15 | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 150 | |
| 56 | 54 | 65 | 79 | 103 | 108 | 132 | 155 | 188 | 233 | 324 |
| 67 | 68 | 82 | 100 | 122 | 136 | 168 | 198 | 236 | 296 | 410 |
| 78 | 83 | 100 | 122 | 149 | 166 | 203 | 241 | 298 | 360 | 500 |
| 89 | 99 | 120 | 146 | 179 | 205 | 246 | 289 | 346 | 434 | 601 |
| 100 | 116 | 140 | 169 | 208 | 234 | 285 | 337 | 400 | 501 | 696 |
| 111 | 134 | 164 | 198 | 241 | 271 | 334 | 392 | 469 | 598 | 816 |
| 125 | 159 | 191 | 233 | 285 | 321 | 394 | 464 | 555 | 698 | 969 |
| 139 | 184 | 224 | 272 | 333 | 373 | 458 | 540 | 622 | 815 | 1133 |
| 153 | 210 | 255 | 312 | 382 | 429 | 528 | 623 | 747 | 939 | 1305 |
| 167 | 241 | 292 | 357 | 437 | 489 | 602 | 713 | 838 | 1093 | 1492 |
| 180 | 274 | 329 | 408 | 494 | 556 | 676 | 808 | 959 | 1190 | 1660 |
| 194 | 309 | 372 | 461 | 566 | 634 | 758 | 909 | 1080 | 1303 | 1852 |
Related Topics
• Heat Loss and Insulation
Steam and condensate pipes - heat loss uninsulated and insulated pipes, insulation thickness and more.
• Steam and Condensate
Steam & condensate systems- properties, capacities, pipe sizing, systems configuration and more.
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