TIME OF FLIGHT DIFFRACTION

PCN Level 3- Time of Flight Diffraction Ultrasonic Testing

Duration: 5days (35 Hours)

Course Overview:

The coursed is designed to provide guidance for preparing TOFD LEVEL 3 examination as per PCN requirements for welds sector. The aim of this course is to ensure candidates understood the scope of the examination, theory concepts & procedure requirements as per CP 25.   On arrival, Mock test on the method is conducted and gap analysis report is prepared based on the outcome of mock test. This will also enable candidates to identify their weak subject areas. Training duration is decided based on the weak areas and candidate requirement.

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Course content

1. Introduction, history of TOFD, advantages, limitation, application
2. TOFD fundamentals, principles, signals, advantages, limitations, TOFD calculations, dead zones
3. Techniques, probes, coverage, its implications
4. Set up, calibration, equipment’s, faults, Selection of parameters for TOFD technique on welds
5. Digitisation, electronics of equipment, displays
6. Errors in TOFD, quality assessment and its parameters, data analysis- classifications of defects
7. Creation of scan plan,  Scan plan, Selection of parameters, Calibration, blocks and Validation blocks
8. Understanding Specifications, procedures, techniques, Analysis of codes, standards, Procedure writing
9. Daily assessment and End of course examinations

Course objective

1. Understanding the physics of ultrasound, Diffraction techniques, dead zone, time of flight calculations, set up, scan plan, calibration, coverage, digitisations, display views & its applications
2. Duties and Responsibilities of an certified TOFD Level 3
3. Demonstrating the ability and competence to evaluate and interpret results in terms of existing standards, codes, and specifications
4. Understanding the various products  and its inspection methodology with ToFD
5. Selection of parameters, techniques and its implementation as per the requirement
6. Establishing the procedure, acceptance criteria when not available and guidance to all levels
7. calibration and validation process
8. Meet the syllabus requirements for PCN Level 3 as per PCN24/ GEN Appendix Z1, PCN24/GEN/APP/UT  & PCN24/AQB/REQ/UT

Eligibility & Experience:

Note: . One-day duration is at least seven hours, which can be achieved on a single day or by accumulating hours. The maximum allowable hours in any one day is 12 hours. Experience in days is achieved by dividing the total accumulated hours by 7.

1. Higher education*, with Level 2 -270 days
2. With Level 2 - 450 days
3. Direct access, with higher education*  - 540 days
4. PCN UT Level 3 or any BINDT recognised UT Level 3 qualification is mandatory to be eligible for TOFD Level 3 exam
5. PCN TOFD Level 2 or any BINDT recognised TOFD Level 2 qualification is mandatory  to be eligible for TOFD Level 3 exam
6. Refer PSL-68_PCN eligibility for holders of other certification for TOFD Level -2 exams
7. Refer PCN24- GEN (latest issue for experience requirement), PCN 24-PSL 30 and RT-FM-A-03 - JOINING INSTRUCTIONS-(latest) for Training duration, experience requirement.

PCN Level 2 Time of Flight Diffraction Testing

Duration: 10 days  ( 70 hours) minimum duration

Course Overview:

This 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 plate butt welds.

Course content:

1. Introduction, history of TOFD, advantages, limitation, application
2. TOFD fundamentals, principles, signals, advantages, limitations, TOFD calculations, dead zones
3. Techniques, probes, coverage, its implications
4. Set up, calibration, equipment’s, faults, Selection of parameters for TOFD technique on welds
5. Digitisation, electronics of equipment, displays
6. Errors in TOFD, quality assessment and its parameters, data analysis- classifications of defects
7. Creation of scan plan, setup files
8. Calibrations such as velocity, wedge, PCS, optimization
9.  Testing of specimen samples
10. Data acquisition & verification of data analysis and data auditing
11. Locating, Flaw characterization and sizing
12. Practical exercise and Daily assessment

Course objectives:

1. Understand the basic concepts of TOFD technique, probes, parameters, coverage.
2.  Understanding Scan planning with various software’s
3. Understanding equipment Electronics, digitisation
4. Calibrating using calibration blocks for weld inspection
5. Optimisations of Set up for various welds
6. Performing inspection and data collection Calibrate TOFD equipment using calibration blocks.
7. Understanding and performing analysis with various software’s
8. Shall gain hands on experience in TOFD weld examination.
9. Meet the syllabus requirements for PCN Level 2 as per PCN24/ GEN Appendix Z1, PCN24/GEN/APP/UT & PCN24/AQB/REQ/UT

Experience:

Note:. One-day duration is at least seven hours, which can be achieved on a single day or by accumulating hours. The maximum allowable hours in any one day is 12 hours. Experience in days is achieved by dividing the total accumulated hours by 7.

1. 180 days of experience required in order to gain full qualification or  45 days ( 25% of UT Exp )with UT L2
2. PCN UT Level 2 or any BINDT recognised UT Level 2 qualification is mandatory to be eligible for TOFD Level 2 exam
3. Refer PSL-68_PCN eligibility for holders of other certification for TOFD Level -2 exams
4. Refer PCN24- GEN (latest issue for experience requirement), PCN 24-PSL 30 and RT-FM-A-03 - JOINING INSTRUCTIONS-(latest) for Training duration, experience requirement.