Using Ultrasonic Waves to Inspect Materials
Ultrasonic Testing (UT) is a non-destructive testing method that characterises a test piece’s internal structure and discontinuities using high-frequency sound waves. It utilises ultrasonic waves to detect cracks and defects in parts and materials. It can also be used to determine material thickness, such as measuring a pipe’s wall thickness.
Ultrasonic thickness testing is part of weld quality control and is crucial to ensuring safety across various industries. This ties into the ultrasonic test for welding, where NDT operators can use ultrasonic flaw detectors to locate and characterise discontinuities within the weld that could lead to material or component failure.
One of the most valuable characteristics of ultrasonic testing is its ability to determine the exact position of a weld discontinuity. This testing method can be used on ferrous and nonferrous materials, being well-suited for testing thicker sections accessible from one side only, and can often detect finer lines or plainer defects that may not be as readily detected by radiographic testing. This testing method requires a high level of operator training and competence and depends on establishing and applying suitable testing procedures.
Advantages of Ultrasonic Testing
High penetrating power, which allows the detection of flaws deep in the part
High sensitivity, permitting the detection of small flaws
In many cases, only one surface needs to be accessible
Some capability of estimating defects' size, orientation, shape, and nature
No potential health hazards
The results are immediate, highly repeatable, and reliable.
Applications
Beyond the ultrasonic test for welding, ultrasonic thickness testing supports a wide range of industries and components:
Weld inspection
Corrosion monitoring
Forgings & castings
Plate & bar stock
In-service inspection
Common Test Methods
ASME SEC V, Article 4 & 23
ASTM A388/388M
ASTM A435/A435M
ASTM A578/A578M
ASTM E213
ISO 17640
Talk to Us Today
Our testing experts are geared and ready to perform your ultrasonic testing and can proactively identify indications of internal defects. We provide ultrasonic testing in-house, onsite, and in the field. Contact us today to learn more about our ultrasonic inspection services or request a quote.
