What is the fit up tolerance on PJP welds on non-load bearing parts?

• A. 5 mm (3/16 inch)
• B. 3 mm (1/8 inch)
• C. 8 mm (5/16 inch)
• D. 2 mm (1/16 inch)

Answer: (A)

Fit-up tolerances for PJP welds on non-load-bearing joints define how much gap or misalignment is allowed before welding becomes unreliable. For non-load-bearing parts welded with partial-penetration joints, a gap of up to five millimeters (3/16 inch) is permitted. This level accommodates practical assembly and some misalignment while still allowing the weld metal to bridge the space and achieve acceptable fusion at the root. The joint isn’t expected to carry load, so a slightly larger gap can be tolerated without compromising overall performance. Smaller gaps would be unnecessarily strict for these joints, and a much larger gap could lead to lack of fusion or an unsatisfactory weld geometry, even in non-load-bearing situations. Therefore, five millimeters is the accepted limit for this scenario.