Allowable Compressive Stress at High Temperatures

[spayette]

Can anyone suggest a method or provide data for determining allowable compressive stress for a cylinder of specific geometry operating at a temperature above the limits in ASME Section II, Part D, Subpart 3?

The specific application would be a tall column constructed of SA-516-70 material receiving local band PWHT and subject to axial and wind loads. PWHT temperature for design purposes would be 1200F. Thanks.

 

[TGS4]

We've evaluated this type of arrangement before, and without giving away the secrets (we were paid rather well for this work), it involved creep and creep buckling.

 

[JoeTank]

The strength of that material will be so low that you may indeed have permenent distortions. We have normally used a crane to lift up on the tower during PWHT in order get compressive load off the tower.

Joe Tank