The bellow compensator will sometimes pull out in practical work and application, and this phenomenon will cause damage to the bellow expansion joint if it is small, and threaten the safety of the whole pipeline if it is large. The degree of damage has a great relationship with the installation of the fixed support and pipe support in the pipeline.
The following explains the reasons for the pulling off of the bellows expansion joint and how to prevent it.

1、 Why does the ripple compensator pull out?
After the installation of stainless steel bellows compensator, the pull rod device attached to the metal compensator needs to be adjusted to its compensation range instead of removing all devices.

It is not necessary to set the fixed pipe support for the pipeline during the pressure test. If the pipe support is not set, the stainless steel metal expansion joint will extend infinitely to its own limit with the pressure and impact force during the pressure test. At this time, the corrugated compensator has been stretched into a straight cylinder or lost its expansion performance.

2、 Why is the degree of damage closely related to the fixed pipe rack?
First of all, it has been pointed out that if the fixed pipe rack is set in strict accordance with the requirements during the installation, the stainless steel bellows can only be pulled off and twisted or offset at most when the pull rod device is removed, even under the influence of pipe pressure and thrust, without damaging the equipment and pipelines of other pipe sections.

3、 How to prevent the stainless steel corrugated pipe from pulling off, and how to set the fixed pipe rack?
The best installation method is to fix the limit bolt within the scope of expansion compensation for the corrugated compensator with pull rod device during installation. Another point that must be noted is that the fixed pipe support and bracket must be set to ensure that the pipe will not be displaced while being subjected to instantaneous pressure and pushing force, so that the bellows expansion joint can play its maximum role.