How many root bends are performed on a 4GF weld test?

How many root bends are performed on a 4GF weld test?

• A. 1
• B. 2
• C. 3
• D. 4

Answer: (B)

The test checks the weld’s root integrity under bending, specifically at the point where the weld meets the base metal. In a 4GF groove weld in the field, the root bend requirement is two bends. Doing two bends ensures the root is evaluated from opposite directions, catching any cracks, lack of penetration, or weak root conditions that might only show up when the weld is stressed in different orientations. One bend wouldn’t fully verify the root on both sides of the joint, while more than two isn’t required by standard practice.