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Pipes and Tubes - Recommended Insulation Thickness
Insulation thickness of heating systems - hot water - low, medium and high pressure steam - systems
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To avoid heat loss and reduced efficiency pipe work in heating systems should always be insulated. Very hot systems, like hot water and steam systems should also be insulated to avoid potential personal injuries.
The table below indicates recommended insulation thickness.
| Recommended minimum Thickness of Insulation (inches)* | ||||
| Nominal Pipe Size NPS (inches) |
Temperature Range (oC) | |||
| 50 - 90 | 90 - 120 | 120 - 150 | 150 - 230 | |
| Temperature Range (oF) | ||||
| 120 - 200 | 201 - 250 | 251 - 305 | 306 - 450 | |
| Hot Water | Low Pressure Steam | Medium Pressure Steam | High Pressure Steam | |
| < 1" | 1.0 | 1.5 | 2.0 | 2.5 |
| 1 1/4" - 2" | 1.0 | 1.5 | 2.5 | 2.5 |
| 2 1/2" - 4" | 1.5 | 2.0 | 2.5 | 3.0 |
| 5" - 6" | 1.5 | 2.0 | 3.0 | 3.5 |
| > 8" | 1.5 | 2.0 | 3.0 | 3.5 |
* based on insulation with thermal resistivity in the range 4 - 4.6 ft2 hr oF/ Btu in
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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
- Insulation - Heat transfer and heat loss from buildings and technical applications - insulation methods and coefficients to reduce energy consumption
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Related Documents
- Copper Pipes - Heat Loss - Heat loss from copper tubes at various temperature differences between tube and air
- 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
- Heat Loss from Steam Pipes (btu/h per ft) - Amount of condensate generated in steam pipes depends on the heat loss from the pipe to the surroundings
- Insulated Steam Pipes - Condensate Load Generated - The heat loss from steam pipes will generate condensate which must be drained from the system - a table indicating the condensate generated in insulated steam pipes (lb/h per 100 ft)
- Insulation Materials and Temperature Ranges - Temperature limits of some common insulation materials
- Perlite Insulation - Thermal conductivity - temperature and k-values
- Polyurethane Insulation - Thermal conductivity - temperature and k-values
