If the radii of a T-joint edge is 8 millimeters, how is it classified?

• A. It is a flare bevel fillet weld
• B. It is not a fillet weld
• C. It is a groove weld only
• D. It is a butt weld

Answer: (A)

When a T-joint has an edge with a radius, especially a relatively large one like 8 mm, the edge is prepared as a bevel with a flare rather than a simple flat edge. This creates a groove-like preparation that is filled with weld metal, but the weld type used along the intersection remains a fillet-style fill, not a full groove weld. The combination of a beveled, flared edge and the fillet weld along the joint describes a flare bevel fillet weld. It isn’t a groove weld because there isn’t a true groove with a single-root opening, and it isn’t a butt weld because the pieces don’t end flush against each other. Nor is it “not a fillet weld,” since the intersection uses a fillet-style fill on the bevel-flare geometry.