I have a question regarding expansion joints
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The above are the details on the expansion joint provided by the customer; compression is only allowed in the axial direction. However, under the hydrostatic test and SUS operating conditions, the expansion joint was stretched by 1.5 mm. Is such stretching allowed? If it’s not allowed, how should we solve it? The nearest support has been changed to ANCHOR. The only method that occurs to me is to install limits on the riser; are there any other options? Please give me some advice
It is feasible as long as the pressure conditions are within the range suitable for the expansion joint; it is only necessary to set a limit for the extension of the expansion joint (using limit bolts to control it according to the length of the installation structure) for reference.
Thank you for your answer. There are two more points I’m not quite clear about. First, does the requirement for setting limits need to be mentioned to the expansion joint manufacturer, or are limits usually built in? Secondly, will the set screws affect the deformation of the expansion joint?
The technical name for an expansion joint is “pipe compensator,” and it has a certain limit of compensation. The exact number required depends on the needs, and it is related to the pipe diameter, length, and temperature difference. There will be no deformation within a certain range of compensation. For reference.