Hi,
I just read the paper by L.C. Peng from Peng Engineering "Understanding Piping Code Stress Evaluation Paradoxes And ASME B31.3 Appendix P" released in August 2013. According to this paper, B31.3 Appendix P "is a poorly conceived, unsafe alternative rules to the main code".

This conclusion is reached by comparing the design by rules approach from B31 and B31.3 appendix P with the design by analysis approach from ASME B&PV Section III Class 1 Components.

I was wondering if any of you had comments or opinions regarding this paper.

Thanks for your input,
Biss