How to consider the nozzle stress when the free expansion amount of the equipment is large

Expansion joints shall be installed on all connections at the sliding end of the equipment. (Longitudinal)

There is no need to bring this up separately to the stress specialists; the pipeline stress engineers will take into account the adverse effects of equipment displacement on the pipelines, calculate the stresses acting on those pipelines, and then provide these data to the equipment specialists for local stress verification.

Thank you very much to the two seniors for your guidance. The current reality is that the equipment has been shipped in skids, and no expansion joints have been installed on the pipelines; the pipelines were constructed by a foreign engineering company. During that time, he also did not provide any specific feedback regarding the stress exerted by this 14\" pipeline on the equipment. The standard load conditions specified in the owner’s standards and specifications are used for the local stress verification of the equipment. I’m really worried right now about the safety of these connectors on this device. These takeovers are essentially perpendicular to the direction of free expansion of the device. 14\" large pipes: I’m worried that the stress won’t be able to be released; small pipes: I’m afraid that even a slight lateral force will cause the pipe to bend. Could expert uu85 explain how the field of pipeline stress takes into account the displacement of connectors without relying on the equipment to provide expansion?

The last edit to this post was made by llu85 on 2017-5-19 at 17:25. 1) Pipeline stress designers should carry out stress assessments for these pipelines as well as local stress evaluations at the pipe ends. 2) Due to the special conditions of the equipment, such large displacements cannot be changed; therefore, the pipeline engineering team needs to address this issue. The equipment department cannot resolve this issue. 3) The piping stress analysis determines the stress on the connected pipes as a result of the expansion of the equipment itself, as well as the stress at the pipe ends. If these stresses exceed the allowable limits, it is necessary to adjust the direction of the pipes or transfer that stress to the equipment design team, until the calculations meet the required standards. 4) Adding expansion joints to the pipeline can solve such problems, but their use is generally not recommended. The general design approach is to first increase the flexibility of the pipeline (through natural compensation); expansion joints are only considered if natural compensation is insufficient (due to space constraints).

Thank you for the guidance; I finally understood it. :D

Generally, for tubes along the tower with large vertical displacements, a tube support attached to the tower is installed on the equipment, so that the support does not easily become dislodged. If support cannot be provided on the tower, spring brackets are generally used for support elsewhere

If pipeline stress analysis is to be conducted, pipeline stress engineers should take into account the displacement of the equipment during the analysis. Perhaps he doesn’t have the values provided by the equipment manufacturer, but an approximate figure for the thermal displacement can be estimated from the equipment’s external diagram. If a stress analysis report is available, it will be possible to check whether heat dissipation locations have been relocated in the equipment.