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Hi Sean, I am having problems with doing Q.A. on my
shell for out of roundness. This is an area which is fairly important to
measure. I have applied the 1% rule as a general
tolerance but trying to comply and understand the PVHO caclcs. ASME PVHO-1-2007 has a section:- 1-7.13.3 (e) (2) Formula for c c= 2.28(R/t)^0.54 cannot get under the
required 2.8 with any normal measurements of a vessel . Do you have any experience with this.
My diameter is 48” and the shell
thickness 5/16” L is 15.75” Have you done any calcs on this area.
Do/t for my purpose is 162 which falls
within normal dimensions and under UG80.1 gives sensible answers. Regards, Hugh __________ Information from ESET NOD32 Antivirus, version of virus signature database 5580 (20101031) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com |