Re: (unknown)

From: <Pankaj>
Date: Tue Aug 23 2005 - 01:23:00 EDT

Erik is right. B31.1, Para 102.3.2 (D) permits the use of liberal stress for piping calculations. In simple terms liberal stress allows use of unutilized stress margin in sustained case as an additional stress allowable for expansion case.

Christopher Wright <chrisw@skypoint.com> wrote:

On Aug 22, 2005, at 2:31 PM, Erik Scheir wrote:

> The liberal stress allowable is used in the computation of the
> expansion
> stress allowable.

Where does this come from? The US piping codes specify one allowable only (I was just joking about liberal and conservative and faith-based allowables). You can apply factors to that one allowable in specific named circumstances to evaluate secondary stress and certain thermal stresses. Are you referring to the allowable primary plus secondary stress as being governed by a 'liberal' allowable?

Christopher Wright P.E. |"They couldn't hit an elephant at <a href="/group/PipingDesign/post?postID=3DPtgnUpDNEGuwjMw6ypUIulgVPobQQ2AD6jaPB7iBkU5I4oDbu0hN3Wxw8BMVXdioOUXNwaYI8_ct4">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>

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[Non-text portions of this message have been removed] Received on Tue Aug 23 01:23:00 2005