If a welded unit fails inspection, what percentage of welds needs to be tested thereafter?

The correct answer is based on the guidelines that often govern the quality assurance processes in welding inspections. When a welded unit fails inspection, it implies a defect or issue that needs to be taken seriously. Consequently, to ensure the integrity and quality of the welding work, it is standard practice to subject a larger percentage of welds to testing after a failure is identified.

In this context, the requirement is that at least 10% of the welds of the rejected unit must be re-inspected, which reflects a cautious approach to quality control. This means that by testing a portion of the welds, the inspectors can ascertain whether the issues were isolated or indicative of broader quality problems. This approach balances the need for thoroughness in ensuring the quality of the welds while also being manageable in terms of resources and time.

This percentage requirement serves as a protocol to safeguard against recurring issues and helps maintain compliance with quality standards, thereby ensuring that future welds meet necessary specifications.