Re: Allowable Stress

From: <Christopher>
Date: Mon Aug 27 2001 - 10:43:00 EDT

>The total allowable stress due to pressure and sustain
>laod and thermal is: S+1.5*S=2.5 * S

Are you certain about this combination? I'm sticking my neck way out here, but ASME pressure vessel code rules are that it's the combined sustained load and thermal stress are subject to the 1.5S limit. A stress of 2.5S exceeds the yield stress for a lot of materials and is close to the shakedown limit for others. The piping Code may be different that Section VIII in some particulars not this different.

Christopher Wright P.E. |"They couldn't hit an elephant from <a href="/group/PipingDesign/post?postID=EY3yXIbyIA8l-oy3atj3qsuzU8MtHOi4t8OXEHGJdn1Pm4XXUdsyW2WsQYZc-nVZwQ7CpXM2R6AgYUYhe_s">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 Mon Aug 27 10:43:00 2001