Define a flare groove weld.

• A. A groove with a square edge
• B. A groove where one or both sides of the joint to be welded have a radiused edge
• C. A groove created by machining the bevel
• D. A groove used for fillet welds only

Answer: (B)

A flare groove weld is defined by radiused edges on one or both sides of the joint to be welded. Those rounded edges create a root with a natural, smooth radius, which helps the weld metal fill evenly from the root toward the faces and improves penetration and fusion at the joint’s root. This edge radiusing distinguishes a flare groove from other groove types that use square edges or straight bevels. It’s not limited to fillet welding, since it describes a groove intended for groove welds where the root geometry is formed by the edge radius.