Ultrasonic Testing (UT)

Acuren Ultrasonic Testing (UT)

Ultrasonic testing services range from manual thickness readings to large scale automated corrosion mapping to phased array flaw detection.

Acuren’s skilled ultrasonic technicians can provide manual or automated mapping and weld examinations for various applications, including piping, vessels and plant.

Automated equipment provides advanced reporting and analysis systems for a variety of applications, including:

  • Tubing: internal rotating inspection systems (IRIS)
  • Tanks: tank crawlers
  • Underground piping: guided ultrasonic wave, automated pipe scanning
PrinciplesA transducer emits high frequency sound waves into the part to be examined. Discontinuities, such as the surface of an internal flaw, reflect back part of the wave energy. From this return signal, information about the reflector location, size, orientation and other features can be learned.
How and where is it used?Obtain material thickness readings To measure the effects of corrosion To detect and measure internal flaws.
Applicable Codes/StandardsAmerican Society of Mechanical Engineers standards related to welded structures American Welding Society American Bureau of Shipbuilding Department of Defense and NASA Substitution of UT for RT: Sections I and VII of ASME Boiler and Pressure Vessel Code, Code Case 2235-6 Appendix U of API 620 and API 650
Form of report or deliverable?Formats range from simple written reports to long term archival of recorded digital images. Permanent record of the examination results is not typical.
AdvantagesHighly sensitive to both surface and sub-surface examinations Method can provide both thickness measurement and flaw detection Superior depth of penetration Results are instantly available No environmental or safety hazard as is present with radiography Regulatory requirement Only single side access required to perform test.
LimitationsSurface must be able to transmit ultrasound Skills and training of the ultrasonic technician are more extensive than other methods Discontinuities that are oriented parallel with the beam energy will usually not be detected Normally requires a coupling medium to provide transfer of sound energy Materials that are rough, irregular in shape are difficult to inspect Cast iron and coarse grain are difficult to inspect due to low sound transmission and high signal noise Reference standards are required for both equipment calibration and the characterization of flaws.
Certifications of technicians performing the work?Level II Ultrasonic technician requires 80 hours instruction and 1,600 hours experience in method.
Rope access applicable?Yes