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#42426 - 04/15/11 01:53 AM the allowable loads on tank nozzles
pooria1978 Offline
Member

Registered: 02/25/08
Posts: 264
Loc: Netherlands
hi

momentarily, I am working on a 24in line connecting to a huge Tank, I am trying to check the loads of the nozzle of the tank using API650 appendix P nomograms. I have got my axial force + longitudinal moment within the boundaries but checking the Fr+Mc, I am not quiet sure what the bottom boundary is. is it the x axis? or any minus value still within the tilted lines is also acceptable?

regards


Edited by pooria1978 (04/15/11 02:41 AM)

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#42433 - 04/15/11 06:35 AM Re: the allowable loads on tank nozzles [Re: pooria1978]
Richard Ay Offline
Member

Registered: 12/13/99
Posts: 6226
Loc: Houston, Texas, USA
The boundary is not the "x axis", but the figure itself (the tilted lines).
_________________________
Regards,
Richard Ay - Consultant

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#42475 - 04/18/11 08:36 AM Re: the allowable loads on tank nozzles [Re: Richard Ay]
Nodal Offline
Member

Registered: 10/07/09
Posts: 20
Loc: Canada
So it means that any minus(-) value of Mc is not acceptable per API 650 App P?

Please let us know?

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#42481 - 04/18/11 12:33 PM Re: the allowable loads on tank nozzles [Re: Nodal]
Richard Ay Offline
Member

Registered: 12/13/99
Posts: 6226
Loc: Houston, Texas, USA
I see your point, that doesn't make sense. I can see where plus and minus on the longitudinal moment would make a difference, but not with the circumferential moment.

I'll have to do some research on this issue.
_________________________
Regards,
Richard Ay - Consultant

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