When should calibration checks be performed during ultrasonic inspections according to ASME Section V?

Calibration checks in ultrasonic inspections are essential to ensure the accuracy and reliability of the results. According to ASME Section V, these checks should be performed before the examination begins, after the examination, and following any changes to equipment or personnel.

This practice is crucial because it helps establish a baseline for the equipment's performance, ensuring that any variations due to wear, environmental conditions, or changes in the operator’s technique are identified and addressed. Performing checks before the examination prepares the equipment and verifies that it is functioning correctly, while checks after the examination validate the data collected. Additionally, if there are changes in equipment or personnel, recalibrating is necessary to account for the potential impact these changes might have on the inspection process. This comprehensive approach ensures consistent and high-quality inspection results.