​ULTRASONIC THICKNESS/FLAW DETECTION (LONGITUDINAL)

Ultrasonic testing (UT) is a family of ​non-destructive testing​ techniques based on the propagation of ultrasonic waves in the object or material tested. In most common UT applications, very short ultrasonic pulse-waves with center frequencies ranging from 0.1-15 MHz, and occasionally up to 50 MHz, are transmitted into materials to detect internal flaws or to characterize materials. A common example is ultrasonic thickness measurement, which tests the thickness of the test object, for example, to monitor pipework corrosion.

 ULTRASONIC SHEAR-WAVE (ANGLE BEAM)

Angle beam transducers are used in conjunction with plastic or epoxy wedges (angle beams) to introduce shear waves or longitudinal waves into a test piece at a designated angle with respect to the surface. They are commonly used in weld inspection. ​

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PHASED ARRAY

Phased array ultrasonic testing (PAUT) is an advanced method of ultrasonic testing.  In contrast, the beam from a phased array probe can be focused and swept electronically without moving the probe. The beam is controllable because a phased array probe is made up of multiple small elements, each of which can be pulsed individually at a computer-calculated timing. The term phased refers to the timing, and the term array refers to the multiple elements.

​SOURCES https://en.wikipedia.org/wiki/Ultrasonic_testing , https://www.olympus-ims.com/en/applications-and-solutions/introductory-ultrasonics/introduction-flaw-detection/

PHOTO GALLERY

ALL PHOTOS ARE OF IN FIELD INSPECTION USING ULTRASONIC TESTING

LARGE CRACK FOUND IN ROOT OF WELD USING ANGLE BEAM UT. VERIFIED WITH MPI AFTER WELD WAS GAUGED.

SHEAR WAVE INSPECTION OF OFFSHORE CAISSON DURING INSTALLATION

TRUNNION INSTALLED ON OFFSHORE DECK FOR PLATFORM REMOVAL