Failed to connect to MySQL: Access denied for user 'root'@'localhost' (using password: NO) Energy Workforce Group | Advanced NDT Inspection - O&G NDT, NDE Inspection

Time of Flight Diffraction (TOFD)

Using pulse eddy current method for measuring the remaining average wall thickness under insulation of low alloy carbon steel/ferromagnetic object and analyzing their decay and is the most reliable method for corrosion detection.

This is an excellent technique to be applied on objects that are insulated and also can be applied on objects that are difficult or extreme cost accessible. The range of application is enormous and INCOTEST contributes in significantly reducing inspection cost. This pulse eddy current technology is an excellent on-stream tool for positioning further inspection works during shut down or periodic maintenance works.

Our real time TOFD inspection – RF B-Scan & D-Scan services is an answer to the disadvantages of Ultrasonic Testing by providing real-time permanent scan images with high sensitivity. TOFD Technology is based on the effect of diffraction. Longitudinal wave are used providing full coverage of material between 2 probes. Defects signal is any do appear in addition to 3 reference signals:

  • Lateral wave (1)
  • Longitudinal wave back echo (2)
  • Mode conversion back echo (3)
    • Advantages

      • Simple calibration
      • Fast and simple linear scanning
      • 100% raw data recording – second opinion is possible without doing secondary inspection
      • Very sure detection of compact and elongated defects including planar shape and sharp edges defects (cracks)
      • Detection is independent of defect orientation
      • Sizing is not dependent on amplitude of the signal
      • Superior inspection reliability
      • Accurate sizing
      • Reliable propagation monitoring
      • Hard copy evidence
      • Easy storage of data
      • Offline analysis
        • Sample discontinuity observed by using TOFD