What is to be considered for value K for the tanks having diameter more than 300 feet?

[BALAMURUGAN1971]

What is to be considered for value K for the tanks having diameter more than 300 feet?
We have a tank size is 360 feet and as per the API 653 B.3.2.2, there is no value mentioned for K.
Can we assume as 1 (one)?

 

[JStephen]

The footnote in that section references a technical paper, and I would try to hunt that up to clarify (it might be available through API).
It may be the intent that if you're outside the scope of the table, that approach shouldn't be used and the "more rigorous analysis or repair" referenced in B.2.2.5 should be applied.

 

[HTURKAK]

The expression at clause B.3.2.2 limits the max. size to 300 ft.
Just curious , if you assume K=1.0 what is the permissible out-of-plane settlement for your case?
The expression limits the permissible out-of-plane settlement to 4.0 in. regardless of the tank size .
Lets say If you have measured and calculated the out-of-plane settlement more than 4.0 inches ( say 6.0 inches) what is your plan ? Abandon the tanks?

Probably i know these tank terminal .
My suggestion would be if the out-of-plane settlement is more than 4.0 in. , ask the services of an experienced consultant company ( I bet you know).