Steve
Ug22 Sec8 and 302.3.5 B31.3 rquire the design has to meet (within the) the
code allowables
including all loading (not excluding upset/transient ) loadings.
This intent carries across all codes. Geoff is the PE specialist and I am
assuming the
same is adopted there, at least my experience is the intent is to do so.(is
work to code).
AWWA covers a lot about transients and the reading is always intended to mean "within" the stated allowables.
Albeit the long discussion we had a short while ago regarding use of the 33%
overpressure.
(as an interesting aside on the latter i recently saw its use written right
into a major EPc
firms piping flexibility design spec. As I said then although i dont agree
with it, its application and use is widespread
albeit in misunderstanding and error.)
from 13sept05 """I think that squares with what I've been saying. 302.2
covers
occasional variations above design conditions--not re-rating.exactly"" ... I
agree fully.
...... i would add , going overpressure (or design allowance and design
factors less than code)
does NOt extend to design either, if one wishes to remain in
code complaince.
OF course what is done in practice is wildly different.
PS i'm not sure our fairer subscriber will like the term ish.
>
> Gents + 1ish
>
> On certain occasions, I have difficulty in deciding on an appropriate
> greeting.
> This is one of those occasions, so gidday.
>
> I picked up this thread from Geoff, who seems to be a Code man, like
> Chris.
>
> Today,my area of interest is in transient design stress for PE pipe. A
> number of "guides" extoll the virtues of PE pipe under transients, and
> then "recommend" that the design stress is the "X" year tensile stress
> or some other arbitary value.
>
> Would Geoff tell me how he determines the design pipe wall thickness for
> PE pipe. I am especially interested in consideration of occasional
> transients and their influence in relation to the (miserable) code
> alllowables. Is it necessary to exercise judgement or do you guys always
> work to code?
>
> Cheers
>
>
> Steve
>
>
>
>
>
> -----Original Message-----
> From: <a href="/group/PipingDesign/post?postID=G8mt7zpXrg6bA5Ui_tLgQ2IEgYIjBu93L7VnQHxqk_5D2IGwUB5VrU6srGFriiMwoKkstuHE1yI_TU3SIW4tpDoSIk0">PipingDesign@yahoogroups.com</a> [mailto:<a href="/group/PipingDesign/post?postID=G8mt7zpXrg6bA5Ui_tLgQ2IEgYIjBu93L7VnQHxqk_5D2IGwUB5VrU6srGFriiMwoKkstuHE1yI_TU3SIW4tpDoSIk0">PipingDesign@yahoogroups.com</a>]
> On Behalf Of Geoff Stone DD&D Australia
> Sent: Thursday, January 05, 2006 11:30 AM
> To: <a href="/group/PipingDesign/post?postID=G8mt7zpXrg6bA5Ui_tLgQ2IEgYIjBu93L7VnQHxqk_5D2IGwUB5VrU6srGFriiMwoKkstuHE1yI_TU3SIW4tpDoSIk0">PipingDesign@yahoogroups.com</a>
> Subject: Re: [PipingDesign] Caesar 2 Stress Analysis Software
>
>
> Ken,
>
> I cannot help you with your question however in respect of buried
> pipelines analysis why do you need to use Caesar II? AS 2566 Buried
> Flexible Pipelines covers the analysis of buried pipelines? Iam on the
> Standards Australia WS28 committee that produced this document.
>
> Admittedly it could be considered conservative in some aspects. The
> largest variable in any such analysis is the properties of soil of the
> combined soil/pipe structure. This is also the case if you use Caesar
> II.
>
> I too am based in Sydney. If you wish to discuss the application I
> will be there tomorrow. Please call on 0402 35 2313 or 02 8850 2313.
>
> regards
>
> Geoff Stone
>
>
> Ken Eppleston <keneppo@yahoo.com.au> wrote:
>
> On the topic of stress analysis software I am searching for an
> intensive training course in the use of Caesar 2 software and in
> particular for buried network systems.
>
> I have access to a licensed version of Caesar 2.
>
> I am currently located in Sydney Australia until the end of February.
>
> Given the amount of expertise that is evident on this forum, in
> particular stress analysts, it appears the best place to investigate
> the whereabouts of a comprehensive training course.
>
> Any ideas or contact details??
>
> Thanks
>
> Ken Eppleston
> Consultant
>
>
>
>
>
>
>
>
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Received on Thu Jan 05 11:13:00 2006
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