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#21471 - 10/13/08 03:44 AM WRC297 warning message
ara Offline
Member

Registered: 10/12/08
Posts: 2
Loc: my
Dear members,

Iím new engineer and new user for PVElite software. So, Iím still in learning process and many things that I donít know. Hope all can help meÖ.

Actually, I want to know about warning messages in WRC297 output (in PVElite). Why it happens and why we can accept that.

I try to find out about that before, but it difficult because I didnít have any source (reference) like WRC bulletin or others.

So, it is very appreciated if anyone could help me by explain it detail to meÖ


...ara...


Edited by ara (10/13/08 03:46 AM)

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#21574 - 10/15/08 12:37 AM Re: WRC297 warning message [Re: ara]
gr2vessels Offline
Member

Registered: 02/07/08
Posts: 72
Loc: Australia
Can you be a bit more specific, which particular warning message you mentioned?

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#21673 - 10/20/08 01:55 AM Re: WRC297 warning message [Re: gr2vessels]
ara Offline
Member

Registered: 10/12/08
Posts: 2
Loc: my
Dear gr2vessels,

Thanks to you respond...wonder no one explains it to me.

Ok...
I have one vessel with this specification...

Shell
Inside Diameter , Dv = 806.000 mm
Thickness , Tv = 22.0000 mm

Nozzle
Outside Diameter , Dn = 152.400 mm
Thickness , Tn = 25.4000 mm

A result for wrc297 show it pass, but the warning message (below) are appear in the result.

"Warning - The ratio, Dn/Tn (6.000) is < 20
check the limitations of WRC bulletin 297."

So,I want to know, why it happens and why we can accept that. Because, as i know the limitation for wrc297 is Dn/Tn < 20


Thanks....


...ara...

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#21676 - 10/20/08 06:37 AM Re: WRC297 warning message [Re: ara]
Scott_Mayeux Offline

Member

Registered: 12/23/99
Posts: 347
Loc: Houston,TX,USA
Dear Ara,

Although it is not explicitly stated in many of these bulletins, you have to determine applicability by reviewing all of the graphs and their useful range. In a brief review of 297 it looks there are no graphs for (Nozzle Diameter/nozzle thickness (d/t)) < 10.0. And for a particular stress result there is not a graph for (d/t) < 20. This is probably why you get the warning.
_________________________
Scott Mayeux
CADWorx & Analysis Solutions
Intergraph Process, Power, & Marine

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