Length Changes In The Pipe System Due To A Change In Temperature - Siemens FDA241 Planning, Mounting

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Length changes in the pipe system due to a change in temperature

4.12 Length changes in the pipe system due to a change
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in temperature
A change in temperature causes the lengths of the pipes to change as well.
With an increase in temperature, the pipes expand and become longer.
With a decrease in temperature, the pipes get shorter.
Please take account of the change in length during installation. The retainers and
fixed points for anchoring the pipes must be designed to allow the pipes to expand
unimpeded.
Take account of the following:
Differences between the installation temperature and the operating
temperature
Variations in operating temperature during use, e.g., differences between
summer and winter, day and night, etc.
The change in length is proportional to the change in temperature and can be
calculated using the following formula:
L Linear expansion in [mm]
L Length of the pipe in [m]
T Maximum temperature difference in [°C]
Coefficient of linear expansion in [mm/m °C]
= 0.08 mm/m °C
PVC
= 0.101 mm/m °C
ABS
Example:
A temperature change of 10 °C with an ABS pipe that is 10 m long results in a
length change of 10.1 mm.
T = 10 m 10 °C 0.101 mm/m °C = 10.1 mm
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2017-09-12