Design validation of rectangular tank using asme

[NovaStark]

Good day all,

I currently have a rectangular tank that I would like to validate the design for. It is open to atmosphere so no high pressures. Because it isn't a circular tank I can't use API 650 and the pressure/temps are too low to fall into an ASME vessel I believe. Would simple engineering formulas be sufficient to say that this tank can be used for its intended service?

I would try to validate using ASME 8 Div. 1 App 13 but there are 3 or 4 braces on the inside made from piping and the sketches in this appendix show a maximum of 2 and I have a feeling that it would fail the asme analysis.

 

[MFJewell]

I used Roark's when I designed a rectangular tank.

 

[MJCronin]

Recommendations for rectangular tank design has been discussed many times on these fora.

http://www.eng-tips.com/viewthread.cfm?qid=55086

http://www.eng-tips.com/viewthread.cfm?qid=424938

http://www.eng-tips.com/viewthread.cfm?qid=429328

http://www.eng-tips.com/viewthread.cfm?qid=296117

Suggest that you stay away from the rules of API-650 and ASME VIII and follow a "tried and true"... a more simplified method

MJCronin
Sr. Process Engineer

 

[NovaStark]

I used Roark's when I designed a rectangular tank.

I was also planning on doing this as the last possibility.

Recommendations for rectangular tank design has been discussed many times on these fora.

http://www.eng-tips.com/viewthread.cfm?qid=55086

http://www.eng-tips.com/viewthread.cfm?qid=424938

http://www.eng-tips.com/viewthread.cfm?qid=429328

http://www.eng-tips.com/viewthread.cfm?qid=296117

Suggest that you stay away from the rules of API-650 and ASME VIII and follow a "tried and true"... a more simplified method

I did read most of these threads already but I just wanted to know if I could have used simple engineering formulas and not have to do an in depth ASME type calculation which I am sure again would fail the ASME criteria.

 

[MJCronin]

We now understand what the problem is .....

MJCronin
Sr. Process Engineer

 

[NovaStark]

We now understand what the problem is .....

Sorry, didn't think the query warranted a great set of details but if it would help:

We have a rectangular tank about 9'x 5'x 5' used to store water with one inlet nozzle at the top and one overflow vent so always under atmospheric conditions.

It's not being used as a pressurized vessel or for process plant related reasons, which is why it isn't designed to any ASME or API code (there is no documentation for it). It was probably made just using whatever was lying around.

The design validation aspect of it is just because I'd like to see what type of analysis would be required for this sort of tank. So for example, if I'd be using the ASME code, I'd eventually have to look up the pressure relief requirements and see if the overflow is sized correctly so on.