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    Ultrasonic Testing (UT)

    Ultrasonic testing (UT)

    An ultrasound transducer connected to a diagnostic machine is passed over the object being inspected. The sound waves propagate through the sample, and reflect at interfaces. The reflected waves are monitored using a detector above the sample. The thickness of the sample, and the depth and type of flaw can be ascertained using this method. The method can be applied to most materials if sound transmission is good. Ultrasonic testing is often performed on steel and other metals and alloys, though it can also be used on concrete, wood and composites, albeit with less resolution. It is used in many industries including steel and aluminium construction, metallurgy, manufacturing, aerospace, automotive and other transportation sectors Quick high sensitive results are obtained.

    The UT Level I course topics include:

    • The principles and theory of performing ultrasonic examination, including the nature of sound propagation and acoustics

    • Description of pulse echo, transducer, thickness, flaw detection, and immersion equipment and their operation, calibration and maintenance

    • Basic testing methods

    • Straight beam and angle beam inspections to specific procedures

    • Review of ultrasonic indications, discontinuities, product forms and their appearances, interpretation and evaluation of results, and completion of data and technique records

    The UT Level II course topics include:

    • Evaluation of base-material product forms, including process review, types, origin & orientation of associated discontinuities and their responses to ultrasound, and applicable codes & standards for each

    • Evaluation of weldments and bonded structures

    • Discontinuity detection and techniques

    • Evaluation procedures and object appraisal


    Interpretation of reflected sound from parallel surfaces is a fairly comprehensible endeavour for even trainees, but throw in oblique’s and even Level IIs can be caught head-scratching. Coupled with weld configurations, it can be down-right intimidating to interpret angular sound waves. This course expands a technician’s ability to work with oblique soundwaves in relation to butt weld configurations, and the many variables that can make interpretation difficult. From set-up procedures to test procedures, the technician is exposed to the current industry requirements which can be tailored to the inspectors industry base, ASME V or AWS D1.1 or 1.6. Attention is also paid to report writing which is emphasized during hands-on instruction portions of the course. A pre-requirement for taking this training is at least a Level I studying to become a Level II.