Dear Sirs,

I am designing a storage tank of diameter 10 m & 13 m height, in which design internal pressure is the full of water. (API 650, 11th edition, June 2007, Addendum 1, Nov 2008)

My concern is, does the "appendix F" is applicable? As per "Fig. F-1", it seems to be no!

I have calculated "maximum design pressure (P)" from F.4.1. Does this calculated pressure is applicable in F.5.1 & F.6?

If not, then what do mean by "Pi" in F.5.1 & "P" in F.6?

Please help me out with this queries.