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FIXED TUBESHEET DESIGN AS PERUHX

M.SHUKLA

Member

Registered:06/05/08 Posts: 55 Loc: INDIA

Dear Mandeep,

I have a doubt regarding Fixed Tubesheet Calculationas per ASME Sec VIII Div I Part UHX.

As per UHX 13.7, There is a provision to reduceshell/channel stresses by reducing youngs modulus.

This calculation is not being performed in PVElite /Code Calc.

Will you please tell me if i want to do this calculation inPVElite/Code Calc, what are the options available?

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Re: FIXED TUBESHEET DESIGN ASPER UHX [Re: M.SHUKLA]

Mandeep

Singh

Member

Registered:12/15/99 Posts: 504 Loc:Houston, Tx,USA

I do not have the code in front of me. But, I think youare referring to the Elastic-Plastic iteration. This isautomatically performed by PV Elite and CodeCalc ifthe stress at the junction fails.

This check is only performed for pressure only caseswhich are cases 1-3.

So, look at the detailed printout of these cases.

_________________________Best Regards,Mandeep SinghIntergraph CADWorx & Analysis Solutions Inc.

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Re: FIXED TUBESHEET DESIGN ASPER UHX [Re: M.SHUKLA]

Purav Member Dear Mandeep,

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12/ 21/ 12FI XED TUBESHEET DESI G N AS PER UHX - I nt er gr aph CADWor x & Analysis

2/ 365. 57. 255. 42/ ubbt hr eads/ ubbt hr eads. php?ubb=showf lat &Num ber =29138

#29254 - 08/13/09 02:15 PM

#29295 - 08/17/09 05:53 AM

Registered:08/07/09 Posts: 30 Loc: India

For U Tubesheet analysis in PVElite / Code Calc, it asksadditional input for U-Tubesheet, this input is the finalstep of U-Tubesheet calculation as per UHX & includeselastic-plastic analysis. The same is also applicable toFixed tubesheet & floating tubesheet but PVElite / CodeCalc do not ask additional input for these cases.

Can you please throw some light here.

_________________________Purav Desai

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Re: FIXED TUBESHEET DESIGN ASPER UHX [Re: Purav]

Mandeep

Singh

Member

Registered:12/15/99 Posts: 504 Loc:Houston, Tx,USA

The design of fixed and floating tubesheets is morecomplicated than the U-tube tubesheets. For thesekind of tubesheets, Elastic-Plastic analysis is the onlyoption available to reduce the tubesheet-cylinderjunction stress. That is why we did not ask for it.Elastic-Plastic iteration is performed automatically ifneeded.

For U-tube, you can choose to increase the tubesheetthickness or the cylinder thickness or perform Elastic-Plastic analysis to reduce the junction stress.

In future we also plan to introduce another option, theSimply-supported tubesheet design, as an alternativeoption to Elastic-Plastic iteration. Then, we will haveto ask the users for it.

Edited by Mandeep Singh (08/13/09 02:17 PM)Edit Reason: clarifications

_________________________Best Regards,Mandeep SinghIntergraph CADWorx & Analysis Solutions Inc.

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Re: FIXED TUBESHEET DESIGN ASPER UHX [Re: Mandeep Singh]

Purav Member

Registered:

Thank You verymuch Mandeep.

12/ 21/ 12FI XED TUBESHEET DESI G N AS PER UHX - I nt er gr aph CADWor x & Analysis

3/ 365. 57. 255. 42/ ubbt hr eads/ ubbt hr eads. php?ubb=showf lat &Num ber =29138

Hop to: PV Elite Go

08/07/09 Posts: 30 Loc: India

_________________________Purav Desai

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