iangineer
Mechanical
- Nov 5, 2020
- 68
I make excel sheets to help me remember things I figured out before.
On my spreadsheet for tank wall minimum thicknesses, I use a corrected height H'=H+(2.31*P/G). H=actual liquid height, P=pressure, G=specific gravity. In reviewing my spreadsheet, I did not reference where I got H' from and I cannot find it in API 620, 650, or 653. It makes sense to me to use H', but do any of you happen to know where I may have found that and if you agree it should be used? Without it, it doesn't seem to matter what pressure the tank is designed for.
I use it in the shell thickness equation (1-foot method) t=(2.6*(H'-1)*D*G)/SE. D=diameter, S=design stress, E=Joint efficiency.
In summary, my question is: Where would I have found H' and should I use it in the shell thickness equation?
On my spreadsheet for tank wall minimum thicknesses, I use a corrected height H'=H+(2.31*P/G). H=actual liquid height, P=pressure, G=specific gravity. In reviewing my spreadsheet, I did not reference where I got H' from and I cannot find it in API 620, 650, or 653. It makes sense to me to use H', but do any of you happen to know where I may have found that and if you agree it should be used? Without it, it doesn't seem to matter what pressure the tank is designed for.
I use it in the shell thickness equation (1-foot method) t=(2.6*(H'-1)*D*G)/SE. D=diameter, S=design stress, E=Joint efficiency.
In summary, my question is: Where would I have found H' and should I use it in the shell thickness equation?
