@MoverZ:I beg to differ but using adjustable support (I hope you mean a support arrangement with jack screw to lower or raise the connected pipe) for alignment for bigger line sizes (say for a 42" compressor line) at site is practically very difficult. I was involved in a detailed fit-up for a 42" compressor line & synchorised efforts of Stress & Construction yielded in a perfect alignment with literally no troubles.

May be my case was one of the lucky ones ...


I fully agree with you that Compressors & Turbines shouldn't be checked for sustained case loadings as per Nema.

@PiperTan: One correction for point# 4&5 -

"Run the analysis and check only the WNC case displacements"

Alignment limits vary from vendor to vendor.I know a few vendors who don't accept 3 mm misalignment. So this figure can't be generalised.