Welder Red Seal · Question
A welding supervisor is reviewing a Welder Performance Qualification (WPQ) record for a new welder. The record shows the welder passed a test plate using SMAW on 10 mm thick carbon steel in the 3G position. According to CSA W47.1, what is the maximum thickness of material this welder is qualified to weld in a production environment for groove welds in the vertical position?
Under CSA W47.1, for groove welds in plate, a qualification test on 10 mm (3/8 inch) plate in the 3G position generally qualifies the welder for welds on materi
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Question: A welding supervisor is reviewing a Welder Performance Qualification (WPQ) record for a new welder. The record shows the welder passed a test plate using SMAW on 10 mm thick carbon steel in the 3G position. According to CSA W47.1, what is the maximum thickness of material this welder is qualified to weld in a production environment for groove welds in the vertical position?
Answer options:
- 10 mm
- 12 mm
- 20 mm ✅ Any thickness above 10 mm
Correct answer: Any thickness above 10 mm
Explanation: Under CSA W47.1, for groove welds in plate, a qualification test on 10 mm (3/8 inch) plate in the 3G position generally qualifies the welder for welds on material of any thickness in the vertical position (for thicknesses greater than the test coupon thickness). This is a common rule for welders qualified on a minimum thickness coupon.
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