Do the tie rods of the expansion joint need to be removed?

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The bellows compensators used in construction projects, those equipped with tie rods on the outside, are primarily designed to prevent the bellows from being damaged due to impacts during transportation, as well as to avoid cracks in the welds caused by vibrations during transport； Another function is stretch limitation. Do the tie rods that come with the wave compensator need to be removed after installation? Ordinary axial bellows expansion joints installed on heating or cooling pipelines must be pre-stretched or pre-compressed according to the required compensation amount as specified in the design prior to installation, and then secured with tie rods ； After installation, the pre-tensioning fixing device must be removed, or the bolts must be loosened. For some axial corrugated expansion joints, it is not necessary to remove the tie rods; instead, the bolts should be loosened to the allowable expansion limit depending on the amount of expansion, thereby serving as a limit for expansion. There are also some large-scale thermal pipelines and industrial pipelines whose tie rods for transverse corrugated expansion joints cannot be removed, such as those with large tie rods for transverse corrugated expansion joints, those with small tie rods for transverse corrugated expansion joints, straight-pipe pressure-balancing corrugated expansion joints, and axial-type double-tie-rod corrugated expansion joints. The tie rod serves to limit expansion and contraction in compensator products, as well as to prevent additional blind plate forces from damaging the corrugations. Before installing the wave compensator, it should be checked in accordance with the requirements specified in the product’s technical documents