Installation issues of the inner nut in compound tie-rod type bellows compensators
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Dear sea friends: Expansion joints with large tie rods have been installed on the steam vacuum extraction pipes in our company to absorb lateral and angular displacements. The manufacturer’s installation instructions state the following: “Note: In vacuum conditions, the nuts on the inner side of the ring plate of the large tie rods must not be loosened.” ” What is the reason? Can the expansion of the main tie rod absorb lateral displacement without loosening the internal nuts? I would be grateful for your guidance.
Since it’s indicated like this, the design should meet the requirements
Thank you. We carried out the installation in accordance with the manufacturer’s instructions, but we don’t understand why it needs to be installed that way.
This post was last edited by Benpeng Guo Jibo45 on 2017-8-29 at 16:48. It is the nut on the inner side of the upper ring plate of the large tie rod that remains tight under vacuum conditions, thereby providing support and preventing the expansion joint from being damaged by external atmospheric pressure.