Ultrasonic Testing is a nondestructive testing method used for detecting sub surface flaws and defects. It uses high frequency sound energy to conduct examinations and make measurements. Ultrasonic inspection can be used for flaw detection/evaluation, dimensional measurements, material characterization, and much more. Although there are a number of technologies employing ultrasound, the simplest explanation of what happens in this method is that sound energy is introduced via a transducer and propagates through the materials in the form of waves. When there is a discontinuity (such as a crack) in the wave path, part of the energy will be reflected back from the flaw surface. The reflected wave signal is transformed into an electrical signal by the transducer and is displayed or recorded in a variety of ways. Both surface and subsurface defects can be detected making ultrasonic’s a volumetric testing method. Applications vary in complexity from very small, hand-held manual units to very large, sophisticated automated systems. This method is used to inspect a variety of product forms including castings, forgings, and weldments. The structural steel, automotive, petrochemical, power generation, and aerospace industries are a few examples that utilize ultrasonic inspection.
Contents UT Level – 1
- A basic introduction to the theory and principles of ultrasound
- The study of propagation, reflection, and attenuation of sound as well as the responses from discontinuities
- Understanding with the equipment
- Precise thickness measurements with UT and the basic procedure
- Control Functions
- Basic Ultrasonic Testing Method
Contents UT Level – 2
- Basic principles of ultrasonic, nature of sound.
- The flaw detector and testing equipment.
- Calibration flaw location and sizing methods.
- Practical exercises.
- Welding Technology – processes and defects
- Basic principles of ultrasonic
- Nature of sound
- Flaw detector
- Setting the controls
- Behavior of ultrasonic waves
- Calibration and reference blocks
- Plotting beam profiles
- Flaw location
- Practical exercises e.g. plates, butt welds, techniques and report writing.
Contents UT Level – 3
- PCN requirements for Level 3 approval
- Complementary NDT methods
- Advanced product technology
- Quality assurance, quality control and supervision
- Specifications, procedures and techniques
- Analysis of reports
- Advanced ultrasonic testing theory and revision
- Analysis of procedures
- Procedure writing
- Mock examinations