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allowable settlement for tank with big diameter

allowable settlement for tank with big diameter

allowable settlement for tank with big diameter

(OP)
what is maximum settlement for oil tank with big diameter i.e. 125m

RE: allowable settlement for tank with big diameter

As much as it wants -----

Sorry - just had to do that!!!  You know - the 800 lb gorilla problem....

RE: allowable settlement for tank with big diameter

I would not be worried so much about total settlement, as by differential settlement- at least as far as the tank itself is concerned.

Total settlement will obvioulsy affect any piping connected to the tank.

RE: allowable settlement for tank with big diameter

alireza1348

Is this a concern about ground settlement or oil sedimentation settlement? When I saw MintJulep's answer I realized that I might have been about to respond to the wrong question.

If it is indeed ground settlement under the tank, then it depends on factors such as the soil stabilization and weight of the tank.  If it's oil sedimentation settlement then it depends on amount of mixing, flow from the tank, time, and probably temperature and quality of the oil.

Please clarify.

Patricia Lougheed

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RE: allowable settlement for tank with big diameter

API-653 has criteria for evaluating settlement of tanks.  I would try to keep settlement much lower than it allows if feasible.

In general, uniform settlement all over isn't a big problem.  Uniform tilting isn't a big problem.  out-of-plane settlement is.  If the tank has a supported roof, then differential settlement between the shell and interior will affect the roof structure.

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