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#37009 - 07/22/10 07:46 PM Thermal Expansion Problem in Tubesheet Analysis
yl0525 Offline
Member

Registered: 11/04/08
Posts: 8
Loc: Singapore
Dear All,

Could anyone advise whether it is a compulsary to evaluate all the 16 load cases for tubesheet under a non-operating condition, says steam out case which is meant for cleaning purpose only.

My customer asked us to perform tubesheet analysis for the steam out @ 175degC (for shell side only) where both the shell & tube side mean temperature to be specified the same at 175degC. This given mean temperature is considered very high if comparing to the values calculated for design operating condition. Meaning to say that this will cause a great thermal expansion problem to the previous proposed design if we consider load case 4 to load case 7 in the in the tubehseet input panel.

I wonder whether can I evaluate the tubesheet without considering the thermal expansion, i.e. uncheck the case 4 to case 7, by assuming both sides are having the same temperature and since this steam out case serves as a cleaning purpose only which should not be carried out for a long period of time.

Thank you.

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#37406 - 08/13/10 08:53 AM Re: Thermal Expansion Problem in Tubesheet Analysis [Re: yl0525]
Mandeep Singh Offline

Member

Registered: 12/15/99
Posts: 600
Loc: Houston, Tx, USA
It is a conservative assumption to assume that the metal temperatures are same as the design temperatures for any condition.

_________________________
Best Regards,
Mandeep Singh
CADWorx & Analysis Solutions
Hexagon PPM

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