Kidly see attached figure for geometry.

In pv elite when we calculate stress due to combined loads, we generally find that the bottom head is having maximum induced stress.due to which we need to increase the thickness of head.

I understand that, with a 'y' geometry, bottom head is hanging from the Y forging and will never be subjected to moments due to wind or piping loads.
Hence a different methodology should be adopted for calculation of stress due to combined loads on bottom head.

If any body can through some light on my understanding.

Hi Somnath,

This is an interesting design. From the sketch it would appear the external loads due to piping/wind/seismic will be transferred directly to the skirt, by-passing the bottom head. PV Elite was not designed with this arrangement in mind. You will simply have to ignore the combined stresses for the bottom head.

Hi Scott

While designing a tall column i have following doubt.

When we calculate stress due to combined load then what should be our max tension & compression ratio?

Which type of loading is very critical amongst the all type of loading?

In there any assumption in the loading due to pipe in the operating condition.