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Number of Course shell designed to API 650

Number of Course shell designed to API 650

Number of Course shell designed to API 650

(OP)
Can anyone advise how to calculate the number of course shell required in a Tank design based on the 1 foot method described in API 650?

Thanks,

Richard

RE: Number of Course shell designed to API 650

Tank plate is normally 8'-0" wide. When turned on its side the 8'-0" plate width becomes a vertical dimension.
A 48 foot high tank has 6 courses (6 times 8' = 48')
A 40 foot high tank has 5 courses (5 times 8' = 40')
etc.
The tank capacities are adjusted by the number of courses and the diameter of the tank.

prognosis: Lead or Lag

RE: Number of Course shell designed to API 650

(OP)
Thanks for the explanation!

RE: Number of Course shell designed to API 650

If it's an existing tank, you go count the shell plate rings that are in place.
If it's a new tank, you consider what steel you can get. I've seen some foreign situations where the available steel was 1.5m, for example.
If it's a small tank and all the shell will be the same thickness, it won't matter in the design, and one- 32' course would be the same as eight 4' courses. If the courses differ in thickness, that's not the case.

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