Phased Array Ultrasonic Testing


Phased Array Ultrasonic Testing (PAUT) is an advanced non-destructive testing (NDT) method that uses an ultrasonic technique to determine component quality and detect failure such as flaws or cracks. PAUT is a versatile tool which can potentially be employed in almost any test where conventional ultrasonic flaw detectors have traditionally been used. A major advantage in replacing RT with PAUT & ToFD is reducing the radiation risks apart from increased probability of detection (POD), production rate and better sizing of the discontinuities. The inspection results are clearly stored and displayed for reporting. It can be used on standard and special materials like austenitic and high alloy materials.

Our Solution

AlphaNDT has developed its own full range of scanner to allow rapid high quality scans on all diameter pipes and plate welds, AlphaNDT offers the best solution for RT backlog with fully code compliant by applying Phased Array Ultrasonic Testing (PAUT) and Time-Of-Flight Diffraction (ToFD) as a replacement to on-site radiography as the following:

  • New and existing welds: Small bore pipe work and Big bore pipe work (from ¾” to above with thickness from 4mm to above).
  • Corrosion mapping
  • Detection of flange face corrosion



  • No health and safety implications with using ionizing radiation;
  • Other work in vicinity need not be suspended during inspection;
  • Elimination of radiation protection measures;
  • Equal or higher reliability of examination in comparison to radiography;
  • Phased array can detect all defect types and characterize them in accordance with acceptance criteria;
  • The ability to test welds with multiple angles from a single probe greatly increases the probability of detection of defects;
  • Simplification of inspection of components with complex geometry;
  • Profile remaining wall thickness in corrosion survey applications; and
  • Providing a permanent record of inspection, eliminating the requirement for film storage
  • Reduced risk of company liability with documented inspection reports


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