I found out that the formula for Uplift Load Cases in Table 5.20b is different in the 13th edition from that of the 12th edition. Also, W1, W2, and W3 are defined differently in the 13th edition. Will it make a huge difference if we follow the 12th edition rather than the 13th edition in this...
How do we calculate exact value of 'Le' in Figure F.2?
I found that the maximum value of 'Le' could be 250/(Fy)^0.5 mm or 3000/(Fy)^0.5 inch. But could not find the exact formula to calculate 'Le'.
In 5.7.8.1(b), two stresses are to be compared. Is there any empirical formula to calculate those stresses namely: meridional membrane stress and circumferential design stress?
In a Pressure Vessel Handbook by Megyesy, I found a formula to calculate the thickness of the shell by using a Maximum seismic moment at the base of the tower. But in API 650, I could not find the exact formula to calculate the minimum thickness of the shell by using seismic calculation (or...
After calculating S (for the top plate) from equation (7-1) and S(for chair height) from equation (7-3), what shall we compare them with? Do both of them need to be less than 25 ksi?
(PS: Expecting for some help)
I found dissimilarity to calculate Sds in Annex E. The formula given in the nomenclature and E.4.6.1-1 differ from each other, one formula uses Ss whereas the other uses S0. Can anyone please help me?
Is H taken as the total height of the shell or height of liquid level?
The figure is shown below, the value of H is taken differently for the same tank calculation. (This is an example of seismic calculation for API650 tank)
Can anyone please help me out with this?
