Steam Pipes - Heat Losses
The amount of condensate generated in a steam pipe depends on the heat loss from the pipe to the surroundings.
The heat loss is a function of the pipe size and insulation quality, the steam temperature (pressure) and the surrounding temperature.
Download and print Steam Pipe Heat Loss diagram
The table below and figure above can be used for estimating heat loss from bare uninsulated horizontal steam pipes - still air conditions - air temperature ranging 50oF to 70oF.
Difference between Steam Temperature and Surrounding Air Temperature (oF) | Heat Loss (Btu/h per ft) | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Dimension (inches) | ||||||||||
1/2 | 3/4 | 1 | 1 1/4 | 1 1/2 | 2 | 2 1/2 | 3 | 4 | 6 | |
100 | 56 | 68 | 82 | 107 | 113 | 138 | 163 | 194 | 243 | 337 |
120 | 71 | 85 | 104 | 127 | 142 | 175 | 206 | 246 | 308 | 427 |
140 | 86 | 104 | 127 | 155 | 173 | 212 | 251 | 300 | 375 | 521 |
160 | 103 | 125 | 152 | 186 | 213 | 256 | 301 | 360 | 451 | 626 |
180 | 121 | 146 | 176 | 217 | 243 | 297 | 351 | 417 | 522 | 725 |
200 | 139 | 171 | 206 | 251 | 282 | 346 | 408 | 488 | 622 | 850 |
225 | 166 | 199 | 243 | 297 | 334 | 410 | 483 | 578 | 726 | 1009 |
250 | 192 | 233 | 284 | 347 | 389 | 478 | 563 | 674 | 849 | 1180 |
275 | 220 | 266 | 326 | 398 | 447 | 550 | 649 | 778 | 978 | 1360 |
300 | 251 | 304 | 372 | 455 | 510 | 628 | 742 | 888 | 1140 | 1557 |
325 | 285 | 343 | 425 | 520 | 580 | 705 | 843 | 1010 | 1240 | 1730 |
350 | 322 | 388 | 480 | 590 | 660 | 790 | 945 | 1130 | 1358 | 1930 |
- 1 Btu/h per ft = 0.96 W/m
Related Topics
-
Heat Loss and Insulation
Heat loss from pipes, tubes and tanks - with and without insulation. Use of materials lke foam, fiberglass, rockwool and more. -
Insulation and Heat Loss from Steam and Condesate Pipe Lines
Heat loss from uninsulated and insulated steam and condensate pipes and tanks. Calculate insulation thicknesses. -
Steam and Condensate
Design of steam & condensate systems with properties, capacities, sizing of pipe lines, system configuration and more.
Related Documents
-
Copper Tubes - Heat Losses
Heat loss from uninsulated copper tubes vs. temperature differences between tube and air. -
Pipes - Bare Surface Heat Loss
Heat loss vs. surface temperature. -
Pipes - Insulated Heat Loss Diagrams
Heat loss (W/m) from 1/2 to 6 inches insulated pipesĀ - ranging insulation thickness 10 to 80 mm and temperature differences 20 to 180 degC. -
Pipes - Insulated Heat Loss Diagrams
Heat loss (W/ft) diagrams for 1/2 to 6 inches insulated pipesĀ - ranging insulation thickness 0.5 to 4 inches and temperature differences 50 to 350 degF. -
Pipes and Cylinders - Conductive Heat Losses
Conductive heat losses through cylinder or pipe walls. -
Pipes Submerged in Water - Heat Emission
Heat emision from steam or water heating pipes submerged in water - assisted (forced) or natural circulation. -
Piping - Recommended Insulation Thickness
Recommended insulation thickness for heating systems like hot water and low, medium or high pressure steam systems. -
Steam Pipes - Fuel Consumption due to Heat Losses over a Year
Yearly heat loss in amount of coal or oil consumption for insulated and uninsulated steam pipes at different dimensions and operation times. -
Steam Pipes - Heat Losses
The amount of condensate generated in a steam pipe depends on the heat loss from the pipe to the surroundings. -
Steam Pipes - Heat Losses
The amount of condensate generated in a steam pipe depends on the heat loss from the pipe to the surroundings. -
Steam Pipes - Heat Losses (W/m)
Heat losses from un-insulated steam pipes. -
Steel Pipes - Heat Loss Diagram
Heat loss from steel pipes and tubes - dimensions 1/2 to 12 inches.