The yield strength for the weld material below is $140$ MPa $.$ The weld goes around the entire circumference forming a full circle $($orange line$).$ The fillet weld size is $5$ mm $.$ Find the maximum force F allowed for a safety factor of $2.$ Note the force direction is perpendicular to the tube and the $200$ mm distance is between the force and the center of the tube.

$($Sol: F $=3200$ N$)$