Hi Josh, thank you for you answer, yet my dubts don't arise from the load combinations that autopipe produces. My question is : given a series of load cases and load combinations (operative, sustained, occasional), how does autopipe calculate the relative thermal stress range(s)? based on which criteria? Let's suppose I have an operating case OP1=G+P1+T1. The relative sustained case would be SUS1=(G+P1). Is then the thermal stress range from as installed to T1 associated with that case given by OP1-SUS1? Am I wrong? Regards
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