Part UHX? 2

[Christine74]

Is anyone here running tubesheet calculations according to the new Part UHX? What software are you using?

How do your results for required tubesheet thicknesses differ from those obtaining running the calculations per TEMA? Clearly, the UHX calculations are much more involved.

Any other comments are welcome.

Thanks,

-Christine

 

[LSThill]

Christine74 (Mechanical)

you may want to contact

http://www.Codeware.com

The home of COMPRESS Pressure Vessel and Heat Exchanger Design Software.

Leonard@thill.biz

http://www.thill.biz

 

[deanc]

White paper that explains some differences at ASME.

http://www.asme.org/codes/

Also try.

http://www.albertaboilers.com

Review Code Case 2429.

If your AIA is HSBCT,check the web site. Good info.

I have two customers who have started designing to UHX. Longhand and spreadsheets. Remember there will probably be some errata coming.

 

[LSThill]

ASME Pressure Vessel Technical Chapter Meeting
October 8, 2003 (Wednesday) Meeting Notice
Program: Design rules for Shell & tube Heat exchangers per new Part UHX for ASME,
Section VIII, Div. - 1 (2003 Addenda)
The 2003 Addenda to Section VIII, Division 1 includes a new Part UHX for Shell-
and-Tube Heat Exchangers. Part UHX may be used starting July 1, 2003 and becomes
mandatory January 1, 2004.
This presentation will review the significant aspects of Part UHX with the intent of
providing the following information:
1) Explain the basis of the tubesheet design rules
2) Discuss the differences between TEMA and UHX requirements
3) Explain the significance of the calculated stresses in UHX
4) Describe the method for determining the ligament efficiency
5) Explain how the rules can be used to optimize the tubesheet design
6) Discuss in-service implications for existing heat exchangers
A question and answer session will allow the participants to address particular
requirements not addressed in the presentation.
Speaker: Urey R. Miller
Chief Engineer - Cullen Center for KBR
Urey R. Miller, P.E. is the Chief Engineer - Cullen Center for KBR. Mr. Miller is currently
a member of the ASME Boiler and Pressure Vessel Standards Committee. He is also a
member of Subcommittee on Pressure Vessels - Section VIII, the Chairman of Subgroup
Design of Section VIII, and a member of the Special Working on Heat Transfer
Equipment (former Chairman).
Time: 11:15 AM - 1:15 PM, October 8, 2003
There is a cafeteria adjacent to the meeting room.
You may want to purchase your sandwich or hot meal from the cafeteria.
Please note that lunch is not included with this meeting.
Location: Halliburton Kellogg Brown & Root
601 Jefferson Avenue
Houston, TX - 77002
Tel.: (713)-753-2000
The meeting will be held in the Lone Star Room of the KBR Tower @ 601 Jefferson Ave.
This room is in the basement of the building and may be reached by using the escalators
in the building. Please check in with KBR Receptionist on the Concourse Level and pick
up your visitor’s badge before proceeding to the meeting room.
Directions: Located on the South side of downtown at the crossing of Jefferson & Smith Streets.
Please see the attached map for location of KBR.
Please park in one of the pay parking lots in the immediate vicinity or look for metered
street parking.
R.S.V.P. We need an exact head count. If you plan to attend, you must make reservation by
October 3, 2003 by calling Codeware @ (281)-497-5705.
For more information, please contact BHARAT BATRA @ (281)-261-4628.

 

[GIGI72]

I'm just beginning to use the part UHX for tubesheet, while I've always use the formulas from TEMA, can You confirm if is there a code case that allow me not to use it (not mandatory?)

 

[jte]

GIGI72-

Code Case 2429 allows TEMA design rules to be used instead of UHX-11 thru UHX-14 and UHX-20.1 thru UHX-20.3. It will expire 1 Jan 2005.

Check with the jurisdiction where the exchanger will be installed to ensure that the Code Case is accepted. Some jurisdictions are very liberal with Code Case applications, some are more stringent. Code Case 2429 was accepted for use in California a few weeks ago.

jt

 

[GIGI72]

ThanK You very much jte, consider that we are located in italy and we mostly product for outside of USA, for this reason we are quite sure, if our AI accept this. Can You e-mail me this code case?(directly to my address luigi.guzzi@flovex.it)