Advanced / Specialist Non-Destructive Testing

Time of Flight Diffraction (TOFD)

The TOFD technique (Total Of Flight Diffraction) is an effective Fully Computerized inspection method for the detection and Assessment of flaws. This technique uses diffraction instead of reflection, as type, location, geometry or orientation of the x1xanomalies is often irrelevant for detection and assessment.

Main benefits of TOFD:

• TOFD defect detection does not depend on the defect orientation, in contrast to the pulse echo technique .
  
• Defect height can be exactly determined.
  
• Higher POD improves risk reduction and calculation.
  
• The evacuation of areas because of radiation is not necessary. That means less interruption in the production process less during pre-service or in-service inspections and fewer logistical problems for the manufacturer.
  
• The inspection results are immediately available, as is a permanent record and a permanent print as longitudinal or transversal projection of the weld is available.
  
• When Engineering Critical Assessment (ECA) is applied, only the relevant defect has to be cut, thereby preventing needless repairs which could harm the integrity of the weld.
  
• The inspection can be performed above 200° C.