How often must a welder who works on pressure tanks be requalified?

A welder who works on pressure tanks must be requalified every year to ensure they maintain the necessary skills and meet safety standards. This annual requalification is crucial because the work involves high-stress conditions where the integrity of welds is vital for preventing accidents and ensuring public safety. Regular requalification helps to assess the welder's competency, keeping them updated with the latest techniques, standards, and regulations that may evolve over time. The annual requirement reflects the importance of continuous skill assessment in industries involving pressure vessels, thus reinforcing the need for safety and quality control in operations.