Time of Flight Diffraction Level 2
| Course Duration | 40 hours (5 days) |
|---|---|
| Designed For | Experienced UT level II or III personnel wishing to have a hands on approach the implementation of a Time of Flight Diffraction program |
| Pre-Course Requirements: | A solid understanding of the physics of ultrasound - candidates should be experienced to, or hold Level II shear wave. In addition, students that are unfamiliar with the functions and use of the Omniscan MX 16/128 unit or higher, should attend the two-day Omniscan Orientation course |
| Cost Per Person | $2,250 (Group Booking Discounts are available - price upon request) |
Course Overview - Time of Flight Diffraction Level 2
This course is designed to take the advanced NDT technician through the Time of Flight Diffraction Technique and its ability to perform flaw detection, location and sizing. Considerable time is spent in the collection and analysis of Time of Flight Diffraction data and the comparison to traditional Pulse -Echo technique.
Key Syllabus Topics - Level II
Fundamentals of TOFD
- Principles of TOFD and the Diffraction Process
- Basic TOFD set up and types of scans
- Digitization of the Analogue Ultrasonic Signals.
- Data collected during an Inspection.
- Grey scale imaging and B-scans.
- Analysis and Off-line Facilities.
- Precision and Resolution.
- Beam Spread Considerations and basics for Calculation of Beam Spread.
- Example of Selection of Number of Scans for an Inspection.
- Choice of Probe Angle.
- Transducer size and frequency.
- Choice of Probe Centre Separation.
- Calibration of Setting of Gain
- Flaw Sizing with the Pulse Echo Technique.
- Comparison of Flaw Sizing Accuracy for Different Techniques.
- Angular Variation of Diffraction Signals.
- Effect of Change in PCS and Importance of Calibration with Lateral and Back Wall signals
- Error due to Variations in Couplant Depth, Surface Profile and Velocity Error.
- Index Point Migration Errors and other cumulative errors.
Data collection and basic interpretation
- Manual, encoded parallel and non-parallel scans
- Encoder calibrations
- Storage, manipulation and interpretation of data
- Basic Interpretation
Key Benefits
- The technician should leave the course with a sound understanding of the TOFD process.
- The technician will be able to carry out basic operations functions, including calibration, detection and identification of indications.
- The technician, with dedicated application will be able to apply code compliant examinations to welded components.
Recommendation
Global School of NDT offers a TOFD Level IIA (Analysts) course specifically aimed at data interpretation. For those personnel that are responsible for the acceptance or rejection of TOFD data it highly recommended that attendance of a level IIA course is undertaken.
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Custom Training Programs
We will modify any offered program to meet your specific requirements. See our custom training programs section.