Re: pressure test thoughts

From: <Christopher>
Date: Wed Sep 07 2005 - 17:19:00 EDT

On Sep 7, 2005, at 2:24 PM, John Luf wrote:

> Not to disagree but see B31.1 2004 Non Mandatory appendix V.... V12.0
> Rerating piping systems....

I'm taking my cue from the ASME PV Code and the National Board governing repairs. In those Codes rerating only applies to downgrading to reflect certain kinds of degradation. If the Appendix is non-mandatory I don't see how it can apply, since non-mandatory appendices are advisory only. The ASME Code actually applies to new construction only. Once it's stamped, that's it. The National Board has rules for repair and rehab but they are specifically directed to restoring compliance with the original construction Code. No upgrades.

Christopher Wright P.E. |"They couldn't hit an elephant at <a href="/group/PipingDesign/post?postID=9V9TcFJBecn0_tVRKZSeODdC7ayxj2EutkoyaDlahg_OjLlnDLVeLeFJA_vI4NU0x3I4wSlxGWVS0Q">chrisw@skypoint.com</a> | this distance" (last words of Gen.

.......................................| John Sedgwick, Spotsylvania

1864)
<a href="http://www.skypoint.com/~chrisw/">http://www.skypoint.com/~chrisw/</a> Received on Wed Sep 07 17:19:00 2005