If temperature in the pipe network drops to such an extent that tensile stresses occur, the maximum tensile stresses in the media pipe will be transferred to the stop ring through the outer casing pipe and the contact faces of the slide guide
Number of fastenings in the pipe system can be reduced, as the expansion joint can be installed in series in sections of pipe without intermediate fastenings. The expansion joint will trigger each other individually. Together with the media pipe, the guide pipe forms a telescopic union in the expansion joint with regard to direction of flow.
This telescopic union also forms a guide, allowing lengths of pipe to be welded together, including the expansion joints, and then laid in the trench without the expansion joint being damaged.
In a metal expansion joint for district heating pipelines the axial compressive forces in the pipeline can be transferred directly through the adjoining end surfaces of the media pipes without the bellows being overloaded when the bellows is fully compressed.
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