When friction coefficient of 0.1 is input, loading at nozzle is exceeded when checking with the equipment specs. But when friction coefficient is removed, loading at nozzle is reduced and is within allowable. I find this case weird and illogical as friction is always present. Can anyone tell me why this is causing overloading and how to overcome it logically?

Why do you think it wierd that removing a source of a load reduces the load ?

You could equally delete temperature .. and reduce loads further. But thermal and friction loads are real and should in association with all other real load sources, be considered in a decent analysis.

For very sensitive equipment like Compressor or Turbine we used to put hanger rod closer to nozzle in lieu of normal resting support to avoid friction load.

Good people,

This is another of the topics that has been very actively discussed here through the years and with much good thought having been rendered in these discussions. The search function provided by this board is a very valuable utility for reaping the harvest of prior discussions. Do it.

Regards, John.