Vertical welding (3G techniques). Bottom (6 o’clock): Overhead welding (4G techniques). Why is it So Challenging?
The difficulty of 5G lies in its transitions. Because the pipe is fixed, a welder starting at the top must transition through three distinct welding positions in a single pass without stopping. what is 5g position in welding
The reason is practical: In the real world, not every pipe can be rotated. Miles of pipeline are laid in trenches or racks where rotating them is impossible. A welder on a pipeline might spend weeks doing nothing but 5G welds, moving from joint to joint. Vertical welding (3G techniques)
This means the welder must walk around the stationary pipe. As they move, the angle of the weld changes continuously. what is 5g position in welding