Quote sggodbole:
“As per my understanding of CAESAR II , since we input D and thickness the program knows whether D/T > 100 and takes corrective action accordingly.”
Stand corrected, CAESAR II follows the rules of Appendix “D” without variance. The Code does not provide the reader any suggestions for “corrective action”. It is up to the piping engineer to provide any variation from Appendix “D” rules that he/she deems appropriate.
An important thing to remember when you are using Caesar II is that it does exactly what is mandated by the Code. The Code in some cases warns you about specific piping design issues without offering a strategy for addressing them. In these cases (no suggestions from the Code) CAESAR II cannot help you. The Code tells you that if you have better (more applicable) data, you should use it (and I will add, document it). Regarding SIF's, remember that the Code SIF's were developed from experiments using NPS 4, standard wall, carbon steel pipe and fittings. The SIF's are based upon extrapolation down to NPS 1/2 (not too much of a stretch) and up to NPS 72 (!!!). If you can find (or develop from e.g., testing or FEA) better data for the system at issue use it. Just part of being a piping engineer.
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John Breen