Hi Mahdee,
This is "one of those topics" that begs to have you do a "search" of this board. It has been discussed many times here and you can get quite an education here. Also, re-read the Caesar II documentation on this subject.
Also, see if you can find a copy of Welding Research Council Bulletin 449.
Title: Guidelines for the Design and Installation of Pump Piping Systems.
V. A. Carucci and J. A. Payne
Welding Research Council Bulletin 449
Regards, John.
Edited by John Breen (06/16/07 10:08 AM)
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John Breen