How to arrange pipes so that pipe stress calculations can be performed

Reply to 1# sunyt007: Your question is too general; the scope is too wide. It’s hard to answer

I am currently reviewing the piping diagrams. The ones provided by the design firm are too complex; the client wants a simpler layout for the pipes, in order to avoid interfering with safety passages and maintenance areas. However, the designers always refuse to make changes on the grounds that the pipe stress is too high; therefore, I would like to understand the stress factors related to the pipes in order to come up with layout options that make it easier to meet the stress requirements.

Reply to 3# sunyt007: Then you can upload the piping diagram for us to take a look. Incidentally, provide the detailed parameters of the pipeline.

It’s too difficult to ask for changes after the design institute has already finished the work

The design is already complete; the design institute certainly won’t agree to make changes so easily. Perhaps some of the pipes do have stress issues, but I think the main reason is the excessive amount of work required for the modifications. As long as it’s not a design flaw, the design institute certainly won’t agree to make changes at this point; however, if you’re willing to pay an additional amount for the design work, I think they might consider it.

That’s exactly the problem, but it can’t be done carelessly either; after all, it’s for personal use. So I always rack my brains to come up with a solution that’s easy to implement and present to the design team, and I also have to draw the pipeline layout myself； :dizzy::@

How do you arrange it? It’s impossible to estimate! Everyone should use professional software for the calculations! There are definitely many methods, but they can’t be changed just by looking or guessing! The maintenance and safety passages should have been taken into consideration by the design institute, right? If it still has an impact, then they’ll be ruined!

This post was last edited by dalmacy on 2011-9-3 01:37. Some stress pipelines are constrained by the spatial limitations of the equipment connected to their ends; a conventional layout cannot meet the requirements related to pipeline stress. It is only through stress calculations and by altering the pipeline’s path to increase its flexibility that it is possible to accommodate the secondary stress deformations caused by thermal expansion and contraction of the pipelines. Therefore, there is a possibility that the pipeline layout will conflict with the operation platform and maintenance space; in such cases, the stress pipelines are given priority. In the owner’s situation, if you are an owner with decision-making power, inform the design team about the space needed for operations and maintenance, so that they can take the owners’ opinions into account when preparing the new plan.

It’s common for the design team to not give enough consideration to spatial and channel issues, or to require makeshift solutions; therefore, do your best to strive for the best outcome!

For most of the external steam pipelines in our facility, stress calculations are required. The layout of these pipelines is determined based on the main route specified by the client; thereafter, appropriate types of supports are selected taking into account the location of the pipes on site, or U-shaped bends are used to absorb some of the stress-induced deformation