Non Circular Vessel - ASME VIII

[pk22]

thread292-261669

Similar to the vessel noted in the previous thread I'm looking to calculate the stress in a vessel and I'm running into issues trying to figure out the right steps to take.

I've come across help for an elliptical (2 radius) cross section however I have a 3rd "corner" radius as well.

I've looked at appendix 13 however it didn't appear the profile I'm using was noted in there.

The thickness formula I've found for the two radius shell is:

t = P * a^2 * b^2 / S * E * (a^2 sin (f)^2 + b^2 cos (f)^2)^3/2

Where a is the major axis and b is the minor axis.

Then for the head I'm using a flanged and dish (torispherical) style however since the shape isn't circular can I still use UG-32 (d) equations for the torispherical head?

 

[SnTMan]

pk22, a sketch or two would be helpful, but I'd hazard a guess you are outside of Code rules. Perhaps far outside...

Regards,

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[DriveMeNuts]

I understand almost nothing that you have written, but sounds like a Div 2 Part 5 job to me.

 

[pk22]

The thread I linked had a similar shape, I've attached the shape of the head I'm looking at using.

The tank is for TDG cargo transport with a design pressure of 3 psi, it needs to loosely follow the ASME codes as per the code I'm following CSA B620.

 

[TGS4]

This would be covered in Section XII, not Section VIII.

 

[pk22]

I've seen Section XII covers cargo, however the code I need to comply with CSA B620 doesn't note compliance with Section XII, it notes compliance with VIII, see below.