What is the typical sequence of steps when performing a weld inspection with angle-beam UT?

What is the typical sequence of steps when performing a weld inspection with angle-beam UT?

• A. Begin scanning immediately, relying on visual cues from the display.
• B. Surface preparation, select wedge/angle, calibrate with a reference reflector, scan along the weld, collect A-scans at key positions, interpret echoes and size defects.
• C. Only calibrate velocity and ignore back wall echoes.
• D. Use only one angle and one position.

Answer: (B)

In angle-beam UT weld inspection, you start with proper setup and calibration before collecting any data. Begin with surface preparation to ensure good coupling and clean access to the weld. Then choose the wedge and the incident angle appropriate for the weld geometry and the orientations you expect defects to have. Next, calibrate the instrument using a reference reflector and the material’s sound velocity so you can translate time-of-flight into depth and verify the presence of a back-wall echo. Once the setup is confirmed, scan along the weld, moving the probe to cover critical regions such as the root and toes, and collect A-scans at key positions to capture the defect signals. Finally, interpret the echoes, using their timing and amplitude to determine defect size, location, and nature, and document the findings. This sequence ensures accurate measurement, reliable data, and proper defect sizing.

In angle-beam UT weld inspection, you start with proper setup and calibration before collecting any data. Begin with surface preparation to ensure good coupling and clean access to the weld. Then choose the wedge and the incident angle appropriate for the weld geometry and the orientations you expect defects to have. Next, calibrate the instrument using a reference reflector and the material’s sound velocity so you can translate time-of-flight into depth and verify the presence of a back-wall echo. Once the setup is confirmed, scan along the weld, moving the probe to cover critical regions such as the root and toes, and collect A-scans at key positions to capture the defect signals. Finally, interpret the echoes, using their timing and amplitude to determine defect size, location, and nature, and document the findings. This sequence ensures accurate measurement, reliable data, and proper defect sizing.