If a welder is qualified on a standard W47.1 test assembly in the vertical up position, is the welder allowed to weld vertically down?

• A. Yes
• B. No
• C. Only if re-qualified for vertical down
• D. Only for short sections

Answer: (B)

Welding qualifications are position-specific. A W47.1 test in the vertical up position demonstrates the welder’s ability to weld in that particular orientation and under those conditions, but it does not automatically authorize welding in the opposite vertical down position. The mechanics of welding change when you go from vertical up to vertical down—gravity affects molten metal flow, heat input control, and potential defects such as sagging or burn-through. To legally weld vertically down, the welder must be re-qualified in that vertical-down position (typically via a separate qualification test or a procedure that explicitly covers that position). The option about short sections isn’t considered a valid basis for extending qualification to vertical down. So, unless re-qualified for vertical down, the welder is not allowed to weld in that position.