hi buytree. I see you have a parallel thread in engtips.
That's a good place for advice. As mentioned:
- You can't simply use the internal pressure calculations to determine external collapse pressure.
- The ASME BPV code is fairly complex for externally pressurized structures. You'll need to dig into UG-28 through UG-30 yourself to do this analysis.
Good question, which figure to use for your material? Use CS-2 since if you check ASME B31.3 in the materials section youíll find A 515 Grade 60 (presume you mean 60, not grade B) has a yield of 32 ksi.
Correct. If you go through the steps in UG-28 and get to step 8 and find your actual pressure is less than the allowable pressure (Pa
) then youíre pipe wall thickness is sufficient.
Yes, but donít worry about ASME Sec VIII. Div 1 for internal pressure. Use B31.3 for internal pressure.
UG-29 covers stiffeners.