Buckling Calculations
Buckling Calculations
(OP)
Does anyone know if there is some type of rough calculations that we can use to verify whether a larger pipe (D/t>100) will buckle if we have a compressive load, bending and external pressure?
Or do we need to carryout FEA on this?
Thanks
FDS2008
Or do we need to carryout FEA on this?
Thanks
FDS2008





RE: Buckling Calculations
RE: Buckling Calculations
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RE: Buckling Calculations
RE: Buckling Calculations
TGS4: ASME Section VIII, Division 1, UG-28 through UG-30 only deals with external pressure. How do you convert max. allowable external pressure to compressive force in order to add up all the components (i.e. pure axial force, axial force due to bending moment and axial force due to external pressure)?
Big Inch: Euler buckling load will give me the critical force which is good, but my issue is calculating the forces in the pipe to verify that they are below the critical force.
fegenbush: I will look into the references but I still need to include external pressure in the equation.
RE: Buckling Calculations
RE: Buckling Calculations
TGS4: If I use Pr/2t to convert external pressure to axial force, I get 4 lbs of axial force. I calculated a max. of 92 psig external pressure using Section VIII DIV I and somehow I cannot believe that the external pressure (1 bar) translates to this minimal effect on the axial force. If I had 6 times the external pressure (close to the max. allowable) it would still only translate to 24 lbs. Does this make sense to you?
RE: Buckling Calculations
RE: Buckling Calculations
The design pressure is 15 psig (vacuum)
The piping is 316L, 42"dia, 3/8" thick and 36" long (connects two vessels)
I have calculated the max external pressure to be 92 psi per ASME Sec VIII DIV I
The forces and moments are yet to be calculated, but I just want to make sure I am on the right track!
RE: Buckling Calculations
RE: Buckling Calculations
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