in-Ground Axial Expansion Joint for Steam Pipelines

In the heat and steam pipelines, a part of a pipeline must be in-ground; the expansion joint installed on this kind of pipeline also has to be in-ground. In this case, the in-ground axial expansion joint is needed.     The in-ground axial expansion joint is actually the unrestrained axial expansion joint with a sealing device to prevent the ground water from entering into the expansion joint. The features of the in-ground axial expansion joint are the same as the unrestrained expansion joint.  It's mainly used to compensate the axial heat deformation for the long and high temperature straight pipes.  This expansion joint belongs to the unrestrained expansion joints and cannot withstand the internal pressure thrust. Therefore, the two main anchors have to be put on the pipe to withstand the internal pressure thrust, the bellow spring rate forces, and the support friction of the pipeline.