Catalog_Sprinkler attachment_EN_2023

TECHNICAL INFORMATION
Pipelines
linear expansion
Expansion chart for various pipe types
Metals and plastics contract with cold and expand with heat. This must be taken into account particularly with pipes in
heating systems where thermostat control causes continual temperature fluctuations. Appropiate pipe supports, that are
able to swing or slide, prevent tensile forces.
Temperature difference DT [K]
Linear expansion DL [mm]
Example:
1 Copper pipe, Cu, length of the pipe
section 30 m
Temperature difference DT = 50 K
Linear expansion DL = 24.75 mm
2 PVC pipe, length of pipe section L = 40 m
Temperature difference DT = 40 K
Linear expansion DL = 128 mm
!
In the case of plastic pipes (PE, PP, PVC)
the linear expansion displayed in the chart
has to be multiplied by a factor of 10.
Linear expansion DL [mm]
Calculation formula for linear expansion
DL = L · DT · α
[mm] [m] [K] [mm/m K]
DL = linear expansion
L = length of the pipeline/pipe section
DT = temperature difference
α = linear expansion coefficient
07/2023
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