Tank Anchorage Ratio "J" Formula
Tank Anchorage Ratio "J" Formula
(OP)
Hi folks,
Does anybody know if Ge, used in Wa fomula (E.6.2.1.1-1b)is supposed to be the fluid density instead of the specific gravity?
If Ge used as specific gravity, then the units don't match up in Wa formula and you almost won't find any API 12 tank which is stable.
Any comments would be appreciated.
Does anybody know if Ge, used in Wa fomula (E.6.2.1.1-1b)is supposed to be the fluid density instead of the specific gravity?
If Ge used as specific gravity, then the units don't match up in Wa formula and you almost won't find any API 12 tank which is stable.
Any comments would be appreciated.





RE: Tank Anchorage Ratio "J" Formula
RE: Tank Anchorage Ratio "J" Formula
RE: Tank Anchorage Ratio "J" Formula
RE: Tank Anchorage Ratio "J" Formula
I am designing 3 tank foundations in California. So, yes it is a high seismic zone.
I have checked my spreadsheet calculations with a few engineers from Fluor and some other companies. Seems like nobody is sure about this equation. They all agree that the units are off though.
IFRs,
I am not sure if constants can carry the units. I believe the units are supposed to match on both sides of equations in any case. You are right about API 12B, it does not cover the seismic evalution. But, looking at ASCE 07-section 15.7.8.2, I was in the impression that API 12B tanks do not require seismic calculations unless required by building officials.
Thanks for your time and comment
RE: Tank Anchorage Ratio "J" Formula
Those standards do not include seismic or wind overturning checks, but you could apply the same methods from API-650. The 12-series standards are intended for oilfield use, and if you're using the tanks anywhere else, you'd probably want to put a little more thought into them.
RE: Tank Anchorage Ratio "J" Formula
First thought would be a 1st shell course 3/8" thick and only 2-ft tall. Would spread the stress pretty well.