Time of Flight Diffraction (TOFD)

Overview

Time of Flight Diffraction (TOFD)

TOFD is performed using longitudinal waves as the primary detection method through the ultrasonic sensors that are placed on each side of the weld.
Using ultrasonic beam spread, TOFD provides wide area of coverage for anomaly detection in the material being tested. Measurements of the time of flight of this diffracted beam enables accurate and reliable flaw detection and sizing. During typical TOFD inspections, A-Scan are collected and used to create B-Scan (Side View) images of the weld.
ESNADVB professionals are highly trained and experienced in TOFD ultrasonic testing for various core industrial sectors. Our expertise in using the state-of-the art equipment such as Olympus Omniscan has allowed us to perform specific testing of high pressure and high temperature pipe welds on circumferential and seams weld between 20mm to 75mm wall thickness.

Advantages:

  • Inspection of construction welds, in lieu of radiography, providing an excellent record of vessel or pipe condition.
  • Application for in-service defects, such as cracking, corrosion, erosion, etc.
  • Very high temperature limitation (700 F), with slight loss in sensitivity.
  • Defects detection regardless of their orientation within the weld.
  • No necessity to stop other activities in the area (which RT demands).
  • Application either during welding or immediately after completion of the weld, allowing instant determination of weld quality.
  • Flaw growth monitoring for run/repair decisions.

Our company

ESNADVB for Reliable NDT, Heat Treatment, and Technical Diagnostics Services

We provide high quality, reliable and competitive services
according to Clients` expectations and projects requirements

ISO 9001-2016, ISO 45001-2019, ISO 14001-2016 accredited company

NCA Accreditation as per ISO 17025

Employees qualified as per ISO 9712-2012 / PCN / ASNT / CSWIP

Licensed to carryout all advanced / conventional NDT and PWHT

Licensed to operation, transport and storage of Gamma & X-Ray Materials

12 years of Safe services with zero LTI