System Having a Device for Producing a Pipeline Unit and Method for Producing a Pipeline Unit

A method for producing a pipeline unit using a system having a device for producing a pipeline unit from a pipeline having a pipeline outer surface and a pipe connector having a pipe connector outer surface, wherein the device comprises an annularly structured stress-relieving device having a longitudinal central axis and a radially inwardly pointing stress-relieving device inner surface, wherein the stress-relieving device inner surface is adapted to the pipeline outer surface and/or the pipe connector outer surface in order to at least partially receive the pipeline unit to be produced in an operation state, and the stress-relieving device surround a pressure tool in the operation state so as to support the pipeline unit to be produced in the operation state when the pipeline is expanded by the pressure tool, the method comprising:

• providing a pipeline,
• providing a pipe connector,
• arranging the pipe connector on the pipeline,
• providing a stress-relieving device,
• inserting the pipeline unit to be produced from pipeline and pipe connector into the stress-relieving device and closing the stress-relieving device,
• providing a pressure tool,
• inserting the pressure toot into the pipeline such that the stress-relieving device at least partially surrounds the pressure tool in the operating state,
• expanding the pipeline to connect the pipeline and pipe connector by means of an interference fit to the pipeline unit,
• removing the pressure tool from the pipeline and
• opening the stress-relieving device and removing the pipeline unit produced from pipeline and pipe connector.