moment about shell to bottom joint from liquid weigth (API 650 5.11.2)

[Oyediran]

thread809-244353
Please someone should help clarify some points about wl (weight of a band of liquid at the shell)
From the referenced thread, it was suggested that to get the Mf, one just multiplies calculated wl by the tanks cross sectional area.
But i think it one is supposed to multiply wl by the tank height (to obtain the total liquid weight since wl is the weight of a band of liquid) then multiply the result by D/2 ( since figure 5-27 shows that the liquid weigt acts at the centerof the cylindrical shelll).
Please, help me out.

 

[JStephen]

I don't see a suggestion to multiply wl by the area in that other thread. Anyway, wl is product weight per unit of circumference that is used to resist overturn, so wl times circumference gives you the total product weight used to resist overturn, and that times the tank radius gives you Mf.

 

[Oyediran]

I probably misunderstood what was there.
Thank you, the explanation is very much clear