Some related post...
http://65.57.255.42/ubbthreads/ubbthreads.php?ubb=showflat&Number=30044#Post30044http://65.57.255.42/ubbthreads/ubbthreads.php?ubb=showflat&Number=21250#Post21250http://65.57.255.42/ubbthreads/ubbthreads.php?ubb=showflat&Number=5736#Post5736Regarding hot setting and the details you can see this- "Piping design and Engineering", by ITTGrinnell.
The denominator in % variation calc (while doing manually) depends on hot/cold setting.
In simple terms to differentiate.
Let us assume a Rest/+Y support has been placed in place of hanger and the SUS load is W1.
Hot setting/Selection is done in such a way that Hanger carries W1 load at Operating, ex: W+D1+T1+P1, i.e, It is designed to take Dead weight at Hot condition.
Cold setting/Selection is done in such a way that Hanger carries W1 load at SUS ex: W+P1, i.e, It is designed to take Dead weight at Cold condition.
In this type of setting, System floats/balanced at hanger location in Cold condition.
You can do a simple homework for a
CAESAR II file with hanger close to nozzle, you will find that Hot setting in most cases yields a lower load at Nozzle in OPE cases.
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