Hi all:

I have a situation where "preloading" a spring support in installed condition helps me relieve the nozzle loads, i.e. instead of zero displacement in the Hanger design case; I have custom design spring such that I have a +0.25" displacement in the "W+H" case. Is this acceptable by code? What sort of special safety / installation measures do I need to consider in order to use this option? Do my load cases need to be defined differently? This is like a cold spring so do I define this in the Hanger design case, i.e. "W+H+C"?

Is there a max displacement that's allowed in the hanger design case?

Please advise me in this situation.

Thank you