In the 4F position, the weld is performed on the underside of a joint, with the welding gun or torch pointing upwards. This position is commonly used in applications such as welding pipes, tubes, and tanks, where the weld needs to be performed on the underside of the joint.
Overhead Adaptive Weld Pool Control (4F) welding 4f position
Proper setup reduces the difficulty of the 4F position significantly. In the 4F position, the weld is performed