We are involved in a piping project where some portion of an existing high pressure (1500 Psig) high temperature (1000ºF) steam piping in ASTM A335 P22 material will have to be removed and a heavy weight (20,000 Lbs) new steam control valve, along with new A335 P22 material piping and associated new pipe supports (hangers)and restraints will be welded to the existing remaining piping. The piping has a nominal diameter of 12", heavy wall thickness (1.3" minimum wall) and is in operation for last 15 years, at reasonably steady load.

As the piping is in operation for so many years in the creep zone, it must have self sprung and therefore a considerable portion of expansion stress, equipment terminal reactions and movements have reappeared in the cold condition. The pipe was erected initially without any cold pull up gap.

Can Caesar-II be used to simulate the configuration (that is movements), residual stress and moments and forces in the cold shutdown condition at all node points of the existing piping system? Please advise.

I had initiated this question on 02-21-2011 on an existing thread, but did not receive any reply. So I am re-issuing it as a new thread.

Regards (2011-02-25)
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kumar