Phased Array Ultrasonic Testing (PA)

Phased Array Ultrasonic Testing is an advanced application of ultrasonic testing technology. It can be used for weld inspections, crack and flaw detections, thickness measurements and corrosion inspections. Because of the detailed visualisation of the defect size, shape, depth and orientation, Phased Array can often be used instead of Radiographic Testing. Since it doesn't use ionising radiation, there is no need to create a safety zone which usually means interrupting production. 

 

In conventional UT testing, a single transducer sends ultrasound waves into the material. Phased Array probes contain multiple transducers. By introducing a delay between the pulses sent out by each transducer, the beam angle, focal point and focal spot of the generated wavefront can be influenced. This makes Phased Array Ultrasonic Testing a very versatile method that can be used for complex geometries.

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Advantages of Phased Array Ultrasonic Testing

  • Quick setup and simple inspection process
  • Suitable for wide range of materials
  • Suitable for complex test piece geometries
  • Applicable on material thicknesses from 3,2 to 200 millimetres
  • On stream inspection up to 400°C
  • No harmful ionising radiation
  • No need to interrupt production
  • Exact information about indication length and depth
  • Scanning large areas without moving the probe
  • Inspection data represented visually
  • Direct interpretation of results
  • Inspection data available in digital format

 

Henk Schroots

Area Sales Manager NDT & Laboratory

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