Well, I'd say not necessarily... I'd say do what is required per code or local jurisdiction (grin).
;-)
In general, I prefer to qualify to design conditions, unless design happens to be completely out of whack.. around here it seems design temp is about 25degF higher than operating... so not a huge issue normally (note if there is a high steam out temperature I don't use that one).
Shannon
Dear shyam_nr
Go thru the contract document carefully and do what is required there...
Limit your work to exactly what is required for the contract.
Damien