For weld inspection, Time of Flight Diffraction (TOFD) was quickly recognized that the method was equally effective for the detection of flaws, irrespective of type or orientation.TOFD does not rely on the reflectivity of the flaw but uses the diffracted sound initiating form the flaw tips. TOFD is more popular because it is vey fast recordable UT and having no radiation so very useful for replacing Radiographic Testing also.


  • This course offers theoretical background to enable technician associated with Ultrasonic     examination to achieve a basic understanding of Time of Flight Diffraction technique.
  • This course is ideal for candidate NDT inspectors, consulting engineers, senior managers as well as     those who want to upgrade their knowledge in in the field of Advance UT.


  • ToFD theory and principles of diffraction
  • Advantage, Limitation & Application of ToFD technique
  • ToFD Scan plan, PCS and angles
  • Flaw location and sizing
  • Limitations of detection and resolution
  • Codes and standards
  • Reporting

To analyze scan data for location and size of defects in typical welded butt joints