Heat Loss from Steam Pipes (W/m)
The amount of condensate generated in steam pipes depends on heat loss from the pipe to the surroundings
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The heat loss is a function of the pipe size and insulation quality, the steam temperature (pressure) and the surrounding temperature.
This table can be used to estimate the heat loss from uninsulated steam pipes.
| Heat Loss (W/m) | ||||||||||
| Temperature Difference between Steam and Surrounding air (oC) | 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 | 1582 |
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