TITANUS
PRO·SENS
®
Installation pipe system
06/13
135
Linear expansion of the pipe system
Linear expansions (lengthening or shortening) of the pipe system are caused
by variations in temperature. An increase in temperature results in lengthen-
ing of the pipe, a decrease in temperature shortens the pipe. It is very impor-
tant to take this into consideration if the installation temperature differs con-
siderably in comparison to the operating temperature.
The length change can be calculated with the following formula:
∆L=
Linear expansion in [mm]
L
=
Length of the pipe to be calculated in [m]
∆T=
maximum temperature difference in (°C)
δ =
Length change co-efficient in mm/m°C
δPVC = 0,08 mm/m°C
δABS = 0,101 mm/m°C
For example, a temperature variation of 10 ºC in an ABS pipe with a length
of 10 m results in an expansion of 10.1 mm.
As a rule, plastic pipe clips, type 23, are used for the installation of pipe sys-
tems (ø 25 mm).
They do not allow for linear expansion and in areas with high temperature
variations the plastic pipe shells, type CLIC-PA must be used. (see figure
"Pipe clips").
7.2
Pipe clips
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