Training Instructor

  • Training Instructor


  • Certification

Course Description

  • Course Description

Time of Flight Diffraction (TOFD) Level II

What TOFD ultrasonic testing?

Welding defects can compromise the stability and integrity of a welded structure. There are different weld testing methods available, with time of flight diffraction (TOFD) considered to be the most reliable method of all.

TOFD is a high performance non-destructive testing (NDT) technique which offers the accurate detection of cracks, slag and lack of fusion. It is an improved version of the conventional ultrasonic testing method which provides a fully computerized system able to scan, store, and evaluate indicators in terms of height, length, and position. There is no other method currently available with similar grade of coverage, precision and speed.

Training Objectives:

TOFD ultrasonic testing course provides the knowledge required to operate equipment and perform manual & encoded TOFD testing on welds. The course covers theoretical aspects on TOFD application, its advantages and limitations. It also includes requirements of code & standards. The course also covers in-depth practical aspects for application of TOFD on welds in Pipes & Plates using required accessories such as calibration blocks, validation samples, encoders, scanners etc.


TOFD Level II Responsibilities:

An individual certified to TOFD Level II has demonstrated competence to perform NDT according to TOFD Testing procedures. Within the scope of the competence defined on the certificate, Level II personnel may be authorized by the employer to:

  • Select the TOFD technique for the test method to be used;
  • Define the limitations of application of the testing method;
  • Set up and verify equipment settings;
  • Interpret and evaluate results according to applicable standards, codes, specifications or procedures;
  • Prepare TOFD written instructions
  • Carry out and supervise all tasks at or below level II;
  • Report the results of TOFD test.

Course Outline:

Days: 8 days training and 2 day exam
Duration: 80 hours

General Topics:

  • Wave physics and properties of Ultrasonic TOFD
  • TOFD Probes and Wedges
    • Features and design
    • Beam Characteristics
    • Proper equipment selection
  • Instrument control and Calibration
    • Basic instrument parameters
    • Wedge Delay and Velocity calibrations
    • PCS Calibrations
  • Scan planning, development, and practice
    • Determining PCS for 2/3 coverage
    • Determining PCS for depth focusing
    • Parallel and non-parallel scanning
    • Multi-probe setups
  • Data interpretation
    • A- and B-scan explanation/interpretation
    • Basic flaw height, length, and depth measurements
    • Basic flaw characterization
  • Advanced analysis functions
    • Lateral Wave synchronization
    • Lateral Wave removal
  • Encoded calibrations and data collection
  • Overview of Codes and TOFD Standards
  • Hands-on TOFD Calibration and Examination Laboratory exercises.


Who Should Attend?

  • Should be High School graduate of science branch (minimum recommended level of education
  • Should have a minimum experience of 160 hours in method.
  • Should have a minimum of Level-II Ultrasonic Testing.
  • Certificates: Near Vision acuity (Jaeger Number 2 or Ortho-Rater 8), and Color Contrast
  • Differentiation has to be submitted at the time of registration.



Certification awarded for those who complete General, Specific and Practical examinations with an aggregate average of 80%.

Course Equipment and Materials:

We provide training material, Omni scan equipment & probes, calibration blocks and sample specimens for practical training.

Class Capacity:

Not more than 8 participants per each batch