Hello,

I have 3 basic questions regarding jacketed piping modeling:

1- Do we need to activate appendix p in order to check the axial stresses in our jacketed piping models?

2- What is usually the material of the spacers considering the the material of core pipe? (would be better to have 0.1 coefficient friction between core and jacket or coefficient of 0.3 is good enough)

3- About modeling of the spacers, what would be the side effects of modeling the spacers in Y and Z direction (as CAESAR jacketed example) compared to the real modeling of the spacers where they are located in 60, 180, 300 deg.

1 - No, you can activate axial stress through the 319.2.3c Saxial switch in Config
2 - ?
3 - I think it would some sort of weird coupling of loads/response that would cause a difference between a Y&Z restraint and something like the set: +X(0,-.5,.866), +Y, +X(0,-.5,-.866)