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#17049 - 04/03/08 02:03 PM Axial Stress Computation by CAESAR II
ichigo Offline
Member

Registered: 12/22/05
Posts: 51
Loc: USA-Philippines
Hi,

I would like to confirm if CAESAR calculate axial stress using the ID of the pipe and not the OD? Or if we need to activate something to do this.

Thanks!

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#17050 - 04/03/08 02:07 PM Re: Axial Stress Computation by CAESAR II [Re: ichigo]
Richard Ay Offline
Member

Registered: 12/13/99
Posts: 6226
Loc: Houston, Texas, USA
If you're talking about F/A, then "A" is the metal area and both the ID and the OD are used to determine this.

If you're talking about the longitudinal pressure stress, you can find this equation in the Quick Reference Guide:

Slp = P x Di^2 / ( Do^2 - Di^2 )

So again, both ID and OD are used.
_________________________
Regards,
Richard Ay - Consultant

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#17070 - 04/04/08 08:19 AM Re: Axial Stress Computation by CAESAR II [Re: Richard Ay]
ichigo Offline
Member

Registered: 12/22/05
Posts: 51
Loc: USA-Philippines
Thanks Richard,

I understand it is the metal area (or FRP), what I mean is if CAESAR considers the ID as less the corrosion liner thickness for axial stress computation.


Thanks! smile

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#17071 - 04/04/08 08:24 AM Re: Axial Stress Computation by CAESAR II [Re: ichigo]
Richard Ay Offline
Member

Registered: 12/13/99
Posts: 6226
Loc: Houston, Texas, USA
"Maybe", it depends on the Piping Code in use. Some Codes consider corrosion and some don't, or don't in certain load cases. You can always force CAESAR II to use corrosion by setting the "All Stress Cases Corroded" flag on the "SIF & Stress" tab of the Configuration Module.
_________________________
Regards,
Richard Ay - Consultant

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