Hello Mariolucas,
I think the best way to look at this is to determine if the remaining thickness is less than the required thickness (by calculation). Depending on the Post Construction Code/Jurisdiction/etc. there may be additional requirements which will be written in those documents. This...
Thank you AWDMIKE,
Fortunately we are doing both the vessel design for the fabricator and the foundation design so it is easier to handle the engineering aspect. Both the building code and ASME have what I consider equivalent legal standing in this instance. Maybe for the 2025 edition of the...
I'm wondering if anyone else has run into this situation.
Currently designing a vessel to the 2023 ed. of Section VIII, Div. 1. Table U-3 states that ASCE 7-22 be used. The jurisdiction where the vessel is going has adopted IBC 2018 (w/ some State specific amendments that do not apply for this...
Europeeng,
I don't think it can be done correctly. The flat head, as has been mentioned earlier, will not be calculated correct so it will show as failing under internal pressure. You could build the model w/ a welded flat on the bottom and then attach a shell and use lugs on the shell. Unless...
It really doesn’t work for what you want. I’ve tried a long time ago. JStephen is correct. Would EN 14015 be more appropriate? If the tank is pressurized to any extent the shell to bottom joint and anchorage needs to be looked at in detail.
SmallInfo,
I just ran a very quick model w/ SA240-UNS S32205 (ASME Section VIII, Div. 1, 2021 edition) where the design temperature for internal pressure was -20F and the external design temperature was 500F. The S value for internal pressure was correct and for the external pressure 'B' value...
Alk2415,
HTURKAK brings up great points. As a STAAD user I would not design a pressure vessel, with respect to local stress analysis, with STAAD. When looking at local stresses for this type of vessel designed to ASME the rules of Section VII, Division 2, Part 5 Design by Analysis is the proper...
ER Azza,
You may want to look at Tubular Steel Structures Theory and Design by Troitsky; there are sections on on the analysis of breech openings including the stiffener design; it may not be 100% applicable to your situation but you should be able to adapt the methodology. Typically when we do...
I still use an HP11c and HP-41CX daily. Not for programming but I have used them since the mid-1980s. The 11C and 15C are actually great to take in the field because they fit easily in a shirt pocket and you can always run a quick number. Almost all of our field work is in industrial plants and...
Ideem,
We do a lot of work in mining and waste-to-energy (WTE) plants. The ash is generally stabilized with lime and is wet and hangs to everything. Our experience is that, in general, a properly specified and applied 3-coat paint system holds up very well. HDG does not hold up more than a few...
saravanan.E.
I don't know if this interpretation helps answer your question; I remember when this was issued.
"Subject Description:
Section VIII, Division 1 (1992 Edition, 1993 Addenda); UG-99(b)
Date Issued:
01/12/1995
Record Number:
BC94-414
Interpretation Number :
VIII-1-95-27...
LittleInch says what I have seen on older vessels as well (1960s vintage) on the shells and heads. Heads I can understand more, especially in the "spherical" portion of 2:1 elliptical. What I was told by a long retired and now deceased CB&I engineer is that first the plate thickness always ran...
static engineer 07,
The required MDMT is a user input and information on that is in UG-20(b). The required MDMT may be related to the surroundings but is most likely process driven. Again, please read UG-20(b).
Please study UCS-66. As GD2 stated the Curve for the SA105 depends on the condition...
Static Engineer 07,
The MDMT would be an input. I believe it is on the "Design Constraints" tab on the lower left and is under "Miscellaneous Design Data". The specifier of the vessel needs to make the determination of the MDMT using the definition in UG-20, assuming Div. 1.
I hope this helps.
