AutoPipe Stress Analysis, When to apply ASME B31.3 Appendix P?

[corsa007]

Hi

Can anybody who is familiar with AutoPipe analysis provide me with some assistance.

When is it appropraite to apply ASME B31.3 appendix P to the pipe stress analysis.

I am finding that I am getting radically different results when the Appendix P option is active.

Corsa 007

 

[BigInch]

When stress is to be calculated considering thermal expansion combined with other case loads.

See this doc for more info,

http://www.becht.com/Content.aspx?cid=180&lvl=3

We will design everything from now on using only S.I. units ... except for the pipe diameter. Unk. British engineer