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Typical pipe stress load cases commonly used for ASME B31.1/B31.3 code stress calculations seem mathematically inconsistent for nonlinear analyses (+Y supports, gaps, friction), relying on linear algebraic subtractions when dealing with nonlinear (NL) load cases. Superposition doesn’t apply in...

Every pipe stress software program I've seen treats valve weights at piping centerline as if the valve is a pipe, and valve vendor technical sheets aren't much help either, since they provide a single weight only for the entire valve, as if it's credible/reasonable to ignore the centroid and...

Hi, I have two general questions regarding response spectrum analysis (RSA), questions which would also apply to any frequency domain loading such as harmonic loads from pressure pulsations or unbalanced vibrating equipment 1) Since results of RSA and other frequency domain loading are positive...

Our company is starting to do more piping design and analysis, and as a structural engineer who will be involved with this work, I want to be sure that I understand what's going on as much as possible. In this context, I have a couple of questions for you pipe stress engineering 'veterans': 1)...