Dear All,

Recently I have started analysis for a cryogenic service line having temperature -39 deg Celsius as operating temperature & -65 deg Celsius as design temperature & material is A 358 TP 304L Cl 1.But CAESAR is not considering any allowable stress value both SC & SH for this material.I couldn't find any allowable stress value in APPENDIX A B 31.3 also.

In doing stress analysis of cryogenic service, what would be major constraints to be followed like load cases to be considered in CAESAR II, spring selection criteria.Since the line is connecting to chiller package,then how do I enter the displacements value due to contraction whether at the junction point of the chiller box or at any some other point.

Can anyone help me to clarify ?

B31.3 states the allowable for min to 100. So your material is 16.7 ksi SC and SH for -425F to 100F. Try material 196 and set your code to B31.3.

Load cases should be the same. If you have a cold T1 and a hot T2 (steam out?) you must do an expansion case for T1-T2 for range.

Enter cold displacements just like hot. The pipe or equipment is shrinking instead of growing.

Make sure that your pipe supports are designed for cold service to prevent moisture entry and icing.

Regards, John