I'm using Pipeplus software to perform stress analysis on a high pressure (~91 bar) boiler feedwater pipe. I'm using ASME B31.1 code. The code/allowable stress ratio informed by Pipeplus results is well within the limits (~60% for sustain+pressure case, ~25% for thermal+sustain+pressure case)...
The program (Pipe Plus) recommends setting the -ExpGapInd option when dealing with non-linear supports. I have a pipe supported by several vertical one-way supports (non-linear), and anchors in both ends. When the pipe is hot, some of these one-ways (the ones near the anchors) are lifted up from...