Time of Flight Diffraction (TOFD) - Level I | Wens Dubai

QUICK LINKS

HEAD OFFICE

Office 2F-A-02, Tower A - Empire Heights, Al Asayel St., P. O. Box: 393179 - Dubai

Phone Number: +971 4554 62 84

Mobile Number: +971 558723094

Email: info@wensdubai.com

REMOTE TRAINING CENTRE

Unit 02-01, No.25 Woodlands Industrial Park E1, Singaore - 757743

Phone Number: +971 4554 62 84

Mobile Number: +971 55871 9234

Email: admin@wensdubai.com

JOIN US ON FACEBOOK

© WENS Technical & Occupational Skills Training LLC.

  • Grey LinkedIn Icon
  • Grey Facebook Icon
  • Grey Instagram Icon
  • Twitter
  • Whatsa

Time of flight diffraction (TOFD) method of ultrasonic testing is a sensitive and accurate method for the nondestructive testing of welds for defects. Measuring the amplitude of reflected signal is a relatively unreliable method of sizing defects because the amplitude strongly depends on the orientation of the crack. Instead of amplitude, TOFD uses the time of flight of an ultrasonic pulse to determine the position and size of a reflector.

In a Time of Flight Diffraction (TOFD) system, a pair of ultrasonic probes sits on opposite sides of a weld. One of the probes, the transmitter, emits an ultrasonic pulse that is picked up by the probe on the other side, the receiver. In undamaged pipes, the signals picked up by the receiver probe are from two waves: one that travels along the surface and one that reflects off the far wall. When a crack is present, there is a diffraction of the ultrasonic wave from the tip(s) of the crack. Using the measured time of flight of the pulse, the depth of a crack tips can be calculated automatically by simple trigonometry

Time of Flight Diffraction (TOFD) - Level I

    • Ultrasonic theory
    • Theory of diffracted ultrasonic waves
    • Digitisation principles
    • Hardware utilised in TOFD
    • Calibration/setting up of equipment
    • Extensive practical element
    • Analysis software
    • Analysis and interpretation
    • Reporting
    • Relevant standards/PCN documentation
  • Grey LinkedIn Icon
  • Grey Facebook Icon
  • Grey Instagram Icon
  • Grey Twitter Icon