What should be considered the thickness for a PJP flare bevel groove weld in a butt joint?

What should be considered the thickness for a PJP flare bevel groove weld in a butt joint?

• A. Shall not be greater than the wall thickness of the HSS member or 60% of the thickness of the planar edge.
• B. Shall equal the wall thickness of the thicker member.
• C. Shall not be less than the thinner member thickness.
• D. Shall be greater than the wall thickness of the HSS member.

Answer: (A)

In a partial-penetration flare bevel groove weld used on a butt joint, the weld depth is intentionally limited to protect material and control heat input. The thickness you consider for a PJP flare bevel is constrained by two factors: the wall thickness of the hollow structural section (HSS) and 60% of the thickness of the planar edge. The rule is to use whichever is smaller. This means the weld should not exceed the HSS wall thickness or 60% of the planar edge thickness, whichever is the limiting value. This keeps the weld from becoming full-penetration and preserves material on the thinner side, reducing burn-through risk and maintaining structural integrity. For example, if the HSS wall is 5 mm and the planar edge is 12 mm thick, the limit is 5 mm; if the HSS wall is 8 mm and the planar edge is 12 mm, the limit is 7.2 mm (60% of 12). This approach matches the intended PJP depth and prevents excessive thinning or penetration.

In a partial-penetration flare bevel groove weld used on a butt joint, the weld depth is intentionally limited to protect material and control heat input. The thickness you consider for a PJP flare bevel is constrained by two factors: the wall thickness of the hollow structural section (HSS) and 60% of the thickness of the planar edge. The rule is to use whichever is smaller. This means the weld should not exceed the HSS wall thickness or 60% of the planar edge thickness, whichever is the limiting value. This keeps the weld from becoming full-penetration and preserves material on the thinner side, reducing burn-through risk and maintaining structural integrity. For example, if the HSS wall is 5 mm and the planar edge is 12 mm thick, the limit is 5 mm; if the HSS wall is 8 mm and the planar edge is 12 mm, the limit is 7.2 mm (60% of 12). This approach matches the intended PJP depth and prevents excessive thinning or penetration.