RE: Hydro Test Pressure

From: <SARE>
Date: Sun May 27 2001 - 00:35:00 EDT

i can understand that Christopher. I don't have a copy of the latest B31.3, but if you do - has there been a change in the b31.3 code allowables? Im trying to save on the fabrication of blinds during the coming turnaround. I just want to have a blind that i can use either for piping, tanks, exchagers or vessels using the 1.3 factor.

-----Original Message-----
From: Christopher Wright [mailto:chrisw@skypoint.com] Sent: 26 May, 2001 9:08 PM
To: ?
Subject: Re: [PipingDesign] Hydro Test Pressure

>Has there been any changed to the
>latest edition of the process piping code with regarrds to the material
>design factor and the hydro test rquirement ?.
The change was made to the ASME Code as a result of the increased allowable stress made a couple of yous ago. The proof factor was decreased from 1.5 to 1.3 to maintain the same margin against yielding during the hydrotest. If the piping code allowables didn't change, then the proof factor wouldn't change.

Christopher Wright P.E. |"They couldn't hit an elephant from <a href="/group/PipingDesign/post?postID=9zkQ6eQ8y0emamyD-wOjeFmLR_DLoldoRbcgkxGk5fKcvNm2Nxoa6Jt8xKisgfmI29hmqT2wJQDT">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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Your use of Yahoo! Groups is subject to <a href="http://docs.yahoo.com/info/terms/">http://docs.yahoo.com/info/terms/</a> Received on Sun May 27 00:35:00 2001