Some of the "old" posts no longer show up, but this may help. try some more SIF searches in this forum.

http://65.57.255.42/ubbthreads/ubbthreads.php?ubb=showflat&Main=6163&Number=29110#Post29110
_________________________
Bob Zimmerman, P.E.
Vice President of The Piping Stress International Association (The PSI)