Ultrasonic Testing (UT)

Ultrasonic Testing, also called Ultrasonic Flaw Testing or simply UT, uses high frequency ultrasonic waves to detect surface breaking and internal imperfections, measure material thickness and determine acceptance or rejection of a test object based on a reference code or standard. Flaw detection is a fast and accurate inspection method to evaluate internal product integrity. Ultrasound penetrates deeply into materials searching for defects, cracks, delamination, lack of bonding and other discontinuities

EW group has decades of experience in applying UT inspections across all industrial sectors. EW group has full range of portable ultrasonic flaw detectors (UT) which provides leading-edge capabilities for locating discontinuities and other flaws and thickness gauges for the accurate measurement of nearly any material.

Our Strengths

Competent Personnel

  • CSWIP
  • PCN 3.1,3.2m3.8&3.9

Latest Equipment

  • Olympus
  • Sonatest

Calibration blocks

  • ASTM blocks

  • AWS code blocks

  • ASME blocks

  • Step blocks

Specialized Probes

  • Angle beam transducers
  • AWS transducers
  • CDS wedges

Advantages of Ultrasonic Testing

Limitations of Ultrasonic Testing

  • High penetrating power
  • High sensitivity
  • Usually only one surface needs to be accessible
  • Insight in size, orientation, shape and nature of defects
  • Non-hazardous to operations or nearby personnel
  • Portable equipment
  • Can be used in automated setup
  • Immediate test results
  • Surface must be accessible to transmit ultrasound
  • Usually a coolant (gel or oil) is needed to enable interference-free transfer of the ultrasound
  • Objects that have a rough surface or are very small, thin or not homogenous are difficult to inspect
  • Cast iron and other coarse-grained materials are difficult to inspect due to low sound transmission and high signal noise
  • Linear flaws oriented parallel to the direction of the sound beam may go undetected
  • Reference standards are required for equipment calibration and for the characterization of flaws