NDT Method — UT
Ultrasonic Testing
Sub-millimeter precision for critical flaw sizing.
Ultrasonic testing (UT) introduces high-frequency sound waves into a material to detect and size internal discontinuities. Reflections from flaws, back walls, and boundaries are displayed on a calibrated instrument, allowing the inspector to determine the location, depth, and extent of any indication.
Arc Inspection Services offers conventional A-scan UT, automated ultrasonic testing (AUT), and Phased Array Ultrasonic Testing (PAUT). PAUT uses electronically controlled arrays of transducer elements to steer and focus the sound beam, enabling faster coverage and more detailed cross-sectional imaging of welds.
UT is particularly valuable for thick-section materials where radiography may have limited sensitivity, for materials where radiation exposure is impractical, and for flaw sizing in fitness-for-service assessments. Our technicians are qualified to ASNT Level II/III per SNT-TC-1A and CP-189.
Method Code: UT
Ultrasonic Testing
Typical Applications
- Thick-wall pressure vessels and reactors
- Pipeline girth welds and long-seam welds
- Corrosion mapping and wall thickness surveys
- In-service inspection and fitness-for-service
- Offshore structural members and jacket legs
Applicable Codes & Standards
- ASME Section V Article 4
- API 650
- AWS D1.1 Annex S
- ASTM E164
- ASNT SNT-TC-1A
Other Services
More NDT Methods
Ready to Schedule UT Inspection?
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