Time of Flight Diffraction

Time of Flight Diffraction (TOFD) is an advanced ultrasonic technique initially developed to enhance the sizing accuracy of flaws that were previously detected using other methods. Initially, the technique was used primarily for flaw sizing. However, as its applications evolved, TOFD began to be utilized as the primary detection method for flaws. Unfortunately, early applications of the technology led to missed major flaws, largely due to improper application and a general lack of understanding by operators of the equipment

Training Days

Time of Flight Diffraction (TOFD) – 10-Days Course for Welds suitable for SNT Level 2 (40 Hours)

Course Outline

  • Ultrasonic Theory: Understanding the fundamentals of ultrasonic testing and wave propagation
  • Theory of Diffracted Ultrasonic Waves: Exploring the principles behind diffracted waves and their role in flaw detection
  • Digitisation Principles: Understanding the conversion of analog signals into digital data for analysis
  • Hardware Utilized in TOFD: Familiarity with the equipment and technology used in Time of Flight Diffraction (TOFD) testing
  • Calibration/Setting Up of Equipment: Techniques for calibrating and properly setting up TOFD equipment for accurate results
  • Extensive Practical Element: Hands-on experience to reinforce theory and build practical skills
  • Analysis Software: Training on specialized software used for TOFD data analysis
  • Analysis and Interpretation: Learning how to interpret TOFD results and assess the severity and location of flaws
  • Reporting: Best practices for compiling and presenting findings in a clear and effective manner
  • Relevant Standards: Understanding the standards and codes that govern TOFD testing for compliance and quality assurance

What are the responsibilities of an individual who is certified to UT TOFD Level 2?

A professional certified to Time of Flight Diffraction (TOFD) Level 2 has proven their capability to perform Non-Destructive Testing (NDT) in compliance with established UT procedures. Within the scope of competence outlined on their certification, Level 2 personnel may be authorized by their employer to:

  • Select the appropriate UT TOFD technique for the specific test method to be employed.
  • Define the limitations associated with the application of the chosen testing method.
  • Interpret and adapt NDT codes, standards, specifications, and procedures into actionable NDT instructions tailored to the specific working conditions.
  • Configure and verify the necessary equipment settings to ensure proper functionality.
  • Execute and oversee the testing process, ensuring adherence to standards and protocols.
  • Analyze and evaluate results in compliance with relevant standards, codes, specifications, or procedures.
  • Prepare written instructions for UT TOFD testing.
  • Perform and supervise tasks at or below Level 2.
  • Provide guidance and support to personnel at or below Level 2.
  • Document and report the results of UT TOFD testing accurately and comprehensively.