OK. did some more reading and I think I have little more clarity.
So, FEA can be used under U-2(g)(1)(-c) to design component thickness if not covered by DBR, by performing only the elastic stress analysis and without strictly following Div.2, Part 5, but still referencing its stress limits...
I say the method is not valid because Div.2 part 5 is not being used.
1. Not checking all modes of failure.
2. The stress limits are not set as per Div.2 Part 5 table 5.3.
3. There may be other requirements to meet when using Div.2 part 5 (i.e weld details) that aren’t being discussed...
Thank you IdanPV and TGS4.
thank you for pointing out UHX-1(7)(b), my bad I didn’t read that far.
So I am left with,
Option one = U-2(g)(1)(-a), use of Appendix 46. Which give two further paths. Part 4 and/or part 5. Since Part 4 didn’t work, I can use Part 5.
Option two = U-2(g)(1)(-c), use...
IdanPV, I really appreciate your reply. It actually made me RE-READ the code. I also read your other post https://www.eng-tips.com/viewthread.cfm?qid=514178 where it gave me more clarity (not to jump straight to FEA part 5 and look for possible alternatives as mandated by code).
Yes - Vessel is...
Not sure if I am being clear or not. Let me rephrase my questions & background.
fixed tubesheet heat exchanger, config. b, tubesheets integral with shell, extended as a flange and gasketed on the channel side.
Q.1 Is it valid to assume the non-circular tubesheets to be a circular and design...
Hi IdanPV,
Thank you for your response.
Yes, the rules for HX have moved to div.2 part 4. Which is design by rule method and shall be used only for a flat circular tubesheet.
Question 1- For a non-circular flat tubesheet (used as support, no saddles) we MUST use div.2 part 5?
Thank you.
Hi TGS4,
Thank you for your response.
For Div.1 ed.2023 fixed tubesheet heat exchanger, all components are designed using Div.1 design-by-rule methods. However, for a non-circular fixed tubesheet which also acts as a support, Div.2 Part 4 design-by-rule formulas cannot be used. Does this mean...
Hello,
Unit - Div.1 U-Stamp heat exchanger
Most of the design of the unit can be done using div.1 rules (Shell, Nozzles, head,etc..)
For a fixed tube sheet div.2 part 4.18 applies. And design can be completed using DBA.
In a rare case when we have tube sheet geometry out of scope and there is...
Hi John,
I tried Mechanical Routing, seems pretty good. But I am facing following problems,
1. Actually I want to do a Top Down design of structural building. This consist of plates and columns at diff. angle and diff. location.
2. In Mech_Routing when I place parts, it creates stock not the...
Hi John,
I have not looked into NX Routing Mechanical application.
I will have a look and if that do not work, I will come back for alternate solution.
Thanks,
Vishal
Hi guys,
I am using NX 10 and I need to create a top down assembly.
I have created skeleton in my assembly file. (This contains hundreds of connected curves )
What I want is, when I select one curve, I should be able to add parts (beams/extrusions) of the same length as of selected curve.
Each...
