Buckling Analysis of Pressure Vessels

Try this link

http://www.cheng.cam.ac.uk/research/groups/laser/Teaching/SAPV/SAPV.pdf

Regards Woody

• For external pressure at shells and tubes, see UG-28 of ASME code, Section VIII, Division 1.

& For external pressure at formed heads, see see UG-33 of ASME code, Section VIII, Division 1.

See the following link: UG-28_&_UG-33

• For Stresses in Large Horizontal Cylindrical Pressure Vessels on Two Saddle Supports (Zick Analysis), see the following link: Zick_Analysis

Thanks for the reply,

1. the condes u have suggested is for external pressure, but which part in asme has to be referred for shell subjected to internal pressure.

2. Whether the buckling has to checked with internal pressure or by caluclating the compressive laods which are acting on the shell.

thankyou

• Buckling in piping and pressure vessels is related and due to the external pressure, and not due to internal pressure.

• And if you have a vessel required to be designed under both internal and external pressures, the usual procedure is to proceed the calculations first for the internal pressure, then make a check for the external pressure.

• May be the calculations as per external pressure required more additional thicknesses and/or more stiffening rings than that required by internal pressure.

• The following link is for internal pressures as per UG-27, UG-32 and Appendix 1 of ASME code, Section VIII, Division 1: ASME_UG-27_UG-32 &_Appendix_1.

* the vessel is subjected to only internal pressure.

if i take torispherical(dished end) part which is subjected to internal pressure.

I dont think only due to internal pressure the part will buckle, only it will bulge.

Or. instead of internal pressure, do i need to calculate the compressive loads and then i have to caaryout the buckling analysis.

There is no external pressure is acting on the vessel. I want to check the internal pressure value to which the component will buckle.

Please advise.

in this case how to solve for bukcling.

thankyou

Buckling is usually the failure from axial loads. It sounds like what you are talking about is hoop stress. The reference above to ASME sections simplify the hoop stress calculations for internal pressures.

If you need to calculate buckling, you can treat this vessel (assuming it's vertical) as a column and compensate for the shape in the moment of inertia. I wouldn't use this calculation for design though (just as a ballpark check).