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Questions and Answers
What is the minimum surface illumination required for visual testing of fusion welds?
What is the minimum surface illumination required for visual testing of fusion welds?
What percentage of weld discontinuities can be detected by an effectively applied program of visual welding inspection?
What percentage of weld discontinuities can be detected by an effectively applied program of visual welding inspection?
What angle should the eyes be from the normal (perpendicular) during direct inspection of weld surface?
What angle should the eyes be from the normal (perpendicular) during direct inspection of weld surface?
What does EN/ISO 17637 specify?
What does EN/ISO 17637 specify?
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What does VWI stand for?
What does VWI stand for?
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What is the recommended surface illumination for visual testing of fusion welds?
What is the recommended surface illumination for visual testing of fusion welds?
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What is the distance at which the eyes should be from the weld surface during direct inspection?
What is the distance at which the eyes should be from the weld surface during direct inspection?
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What does NDE stand for in the context of welding inspection?
What does NDE stand for in the context of welding inspection?
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What is the recommended qualification for personnel performing indirect visual testing?
What is the recommended qualification for personnel performing indirect visual testing?
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What is the maximum root opening for fillet welds when t = 8mm?
What is the maximum root opening for fillet welds when t = 8mm?
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What should be done prior to deposition of subsequent passes during welding?
What should be done prior to deposition of subsequent passes during welding?
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What should be examined to determine if a finished weld meets application or product standards?
What should be examined to determine if a finished weld meets application or product standards?
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When should final VT be performed?
When should final VT be performed?
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What should be done when defects are discovered in repaired welds?
What should be done when defects are discovered in repaired welds?
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What is the maximum joint misalignment for butt [groove] welds when t = 20mm?
What is the maximum joint misalignment for butt [groove] welds when t = 20mm?
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What should be used to remove all slag to ensure imperfections are not obscured?
What should be used to remove all slag to ensure imperfections are not obscured?
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What is the qualification used by 3rd party labs to confirm personnel qualification?
What is the qualification used by 3rd party labs to confirm personnel qualification?
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What should be avoided when weld finishing is required?
What should be avoided when weld finishing is required?
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What should be examined to assure complete defect removal in repaired welds?
What should be examined to assure complete defect removal in repaired welds?
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What should be done if the gaps between the parts to be joined exceed the appropriate limit?
What should be done if the gaps between the parts to be joined exceed the appropriate limit?
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Study Notes
Visual Testing of Fusion Welds
- Minimum surface illumination required for visual testing of fusion welds: 500 lux
- Effectively applied program of visual welding inspection can detect approximately 80-90% of weld discontinuities
Direct Inspection of Weld Surface
- Eyes should be at an angle of 30-40° from the normal (perpendicular) during direct inspection of weld surface
- Recommended distance from eyes to weld surface during direct inspection: 400-600 mm
Standards and Qualifications
- EN/ISO 17637: specifies requirements for visual examination of welds
- VWI: Visual Welding Inspection
- NDE: Non-Destructive Examination in the context of welding inspection
- Recommended qualification for personnel performing indirect visual testing: Level 2 or Level 3 VT certification
Welding and Inspection
- Recommended surface illumination for visual testing of fusion welds: 500 lux
- Maximum root opening for fillet welds when t = 8mm: 2.5 mm
- Prior to deposition of subsequent passes during welding, the surface should be cleaned and free of oil, grease, and moisture
- Final VT should be performed after completion of all welding operations
- When defects are discovered in repaired welds, they should be reworked to meet application or product standards
Inspection and Repair
- To assure complete defect removal in repaired welds, the weld surface should be examined
- If the gaps between the parts to be joined exceed the appropriate limit, the parts should be re-machined or resized
- A qualified weld inspector should be used to examine the finished weld to determine if it meets application or product standards
- A wire brush or equivalent tool should be used to remove all slag to ensure imperfections are not obscured
- The qualification used by 3rd party labs to confirm personnel qualification is the VT certification
- When weld finishing is required, grinding or machining should be avoided to prevent hiding defects
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Description
Test your knowledge of visual welding inspection fundamentals and EN/ISO 17637 standards with this informative quiz. Explore the key concepts and essential skills required for effective visual welding inspection in the fabrication process.
