RE: Vacuum condition modelling

From: <Rajesh.Balapure@ril.com>
Date: Wed Sep 15 2004 - 05:34:00 EDT

Extract from caeser help menu:->
Enter the design gage pressure (i.e. the difference between the |internal and external pressures).

Note: CAESAR II addresses negative pressures as follows: the absolute value of the longitudinal pressure stress (PD/4t) term is added to the appropriate code equations; pressure thrust forces applied to expansion joint ends will be compressive; and buckling is not addressed in CAESAR II. t
For further queries contact coade or do visit www.coade.com to get mail ID for queries or you can directly put in the queries..

Regards,
Rajesh V Balapure

                       <<a href="/group/PipingDesign/post?postID=n-0MRC7Lql_EfOON2JkmLgN_WfrRhzvRhQ19JKb7r4XwMaJUJOjfeA5OxFE48wg2PDvWi5-VW9SSVg">sekar@idealtd.co</a>
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                                                cc:       (bcc: Rajesh V
Balapure/JAMNAGAR/RIL)
                       09/15/2004 02:27         Subject:  RE: [PipingDesign]
Vacuum condition modelling
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Dear Yan

The CAESAR can not check the pipe for vacuum conditions. You have to separately check the pipe for vacuum with ASME Sec VIII Div-I

good luck

SEKAR -----Original Message-----
From: <a href="/group/PipingDesign/post?postID=CE3QL9QjiqWRzBxjYgKYvRQcqv22DQPNHYA8nNq99rrtp_OExcpEkPMVymUGLOnVGwCe_nbgAj-A">yans@technip.com</a> [mailto:<a href="/group/PipingDesign/post?postID=CE3QL9QjiqWRzBxjYgKYvRQcqv22DQPNHYA8nNq99rrtp_OExcpEkPMVymUGLOnVGwCe_nbgAj-A">yans@technip.com</a>] Sent: Wednesday, September 15, 2004 2:25 PM To: <a href="/group/PipingDesign/post?postID=lDcsvb5xP8TQDqjzWdREymLHkBjArl-BNhQiwZR3baYqA1jhqCPMU6fA8gsMdGCR1UCKEvBqT5fcns-kYsrF9B4in5nOkLI">PipingDesign@yahoogroups.com</a> Subject: [PipingDesign] Vacuum condition modelling

Dear all,

I am working on pipe stress analysis using Caesar II, one of my client ask me to make the case for vacuum condition which I never did before.. To make the vacuum condition I make the prssure input as minus 101 kpa, and I see the software is running well.
Since this is my first time to model the pipe under vacuum condition, I am not sure that what I did is correct please somebody advise me. Also what are the loads should be make for vacuum condition.

Thanks all,
Yan

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