Circular fillet weld acc. Eurocode or any other european standard

Hello!

I need help dimensioning my fillet weld to the left in attatched picture acc. some european standard, preferably, hence figuring out the required throat thickness.



So, my initial thought was that if i treat the Moment M, like a couple, my force in upper weld would be F = M/D, so, the weld length then taking this force would be pi*D/2, or something like this... Anyone has a solution ?

Thanks in advance,

Daniel