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Ultrasonic Testing (UT)

Efficient Testing of Thick Materials for Flaws and Imperfections

What is ultrasonic testing?

Ultrasonic testing (UT) and inspection is a non-destructive testing methodology used primarily for the evaluation of the mechanical and structural properties of materials, especially for the detection of material thicknesses and flaws. UT begins by introducing high frequency sound waves into a material under test. The intensity of the sound waves is measured, either on the opposite side of the material under test or at a point of reflection. The level of intensity can then be correlated with established results for sample materials of the same composition, which allows an inspector to determine the presence and location of any flaws.

What are the advantages of ultrasonic testing?

UT is superior to conventional radiography in detected flaws located deep within materials under test. Further, the extreme sensitivity of UT test waves allows small flaws to be precisely located and sized. UT is also a flexible testing method that requires access to only one surface of the material under test for evaluation purposes. Finally, UT produces a rapid response from materials under test, allowing for fast and efficient inspection of large or expansive piping installations.

Why use TÜV SÜD for your ultrasonic testing requirements?

TÜV SÜD Chemical, Oil and Gas pioneered the use of ultrasonic testing and inspection services and is a leading provider of nondestructive testing methods and techniques. Our laboratories and testing facilities can perform quality inspections on almost any form of ferrous material, component or product assembly. And TÜV SÜD’s inspection professionals are certified to the American Society of Nondestructive Testing (ASNT) Level III and Level II requirements.

Our services at a glance

TÜV SÜD ultrasonic testing services include:

Conventional ultrasonic testing (UT) - Conventional ultrasonic testing uses acoustic waves that reflect back when encountering the surface being evaluated.

Shear wave testing - Also referred to as ultrasonic volumetric testing, shear wave inspection and testing is often used to inspect welds in boiler tubes.

Phased array ultrasonic testing (PAUT) - This ultrasonic testing method utilizes high-speed electronic scanning without moving parts, and collects images from multiple angles with a single probe.

Time of flight diffraction (TOFD) ultrasonic inspection - This multi-mode ultrasonic inspection technique measures the flight time of sound energy through a material

Ultrasonic B-scan imaging - Data from ultrasonic testing can be displayed in a number of different formats. B-scan imaging is often used to determine the depth or thickness of a material as well as its approximate dimensions.

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