Linear expansion
Free Expansion
Fixed supports prevent undesirable movements of the pipe. Stabilizing abilities of the fixed supports must be better than on the sliding supports.
Figure 8
The expansion adjustments are made mostly unidirectionally in polypropylene pipes. The pipe should move freely in the axial direction. Freely moving expansion parts are created in order to pre- vent the installation from linear expansion which may arise in the pipes due to temperature fluctuation.
Length of freely moving part is calculated by the following formula: Ls = K x √ d x ∆ ∫
SN: Fixed point KN: Varying point Ls: Length of freely moving part (mm) D: Pipe outer diameter ∆ ∫: Amount of elongation (mm) L: Pipe length (m) K: Specific constant of material (K=30)
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Made with FlippingBook Annual report