Dear All,

I have stress system having piping with Eccentric reducer with Flat side down.

Location of reducer is near equipment nozzle.

If I modelled flat side down eccentric reducer, nozzle loads are exceeding the allowable limits as first support lifted due to eccentricity.

But, If I modelled concentric type reducer, Nozzle loads are within allowable limits.

Request to advice regarding the Flat side down eccentric reducer modelling in C-II to solve above problem.

Regards,
Shamalia Bhavin

Try adding rigid elements from center of pipe to bottom of pipe, and adding the supports to bottom of pipe instead of center of pipe.

Thanks Michael for quick reply.

Dear Richard and Dave,

Any other alternative method to solve above problem

Regards
Shamalia Bhavin

Remember CAESAR II is a beam element analysis program. Imagine everything modeled as a piece of spaghetti. Now, what is the difference between a concentric reducer and an eccentric reducer? None as far as beam elements are concerned.

If one reducer model passes and the other fails, you're splitting hairs, which the beam element really can't do. Determine why the one model fails and solve that issue.

While Michael's solution may solve your problem in this instance, I'll argue that you're close to the (pass/fail) edge to start with. More accurate modeling is always a good thing, but you need to remember the limitations of the beam element.