Germiston, South Africa
What is the method?
ToFD is an advanced ultrasonic technique that detects diffracted signals from flaw tips using a transmitter and receiver positioned on opposite sides of a weld. It is particularly suited to accurate sizing of planar defects.
Application
ToFD is an advanced ultrasonic technique that detects diffracted signals from flaw tips using a transmitter and receiver positioned on opposite sides of a weld. It is particularly suited to accurate sizing of planar defects.
Key Benefits
- Excellent through-wall defect sizing capability.
- Provides permanent digital scan records.
- Efficient for long weld seams.
- Strong support for engineering critical assessment.
Inspection Capabilities
- Particularly strong in accurate through-wall height sizing of planar flaws.
- Highly useful for fitness-for-service evaluation, crack monitoring, and defect acceptance decisions.
- Efficient for scanning long seam welds in encoded applications.
- Uses flaw-tip diffraction rather than only amplitude response, improving sizing reliability.
Limitations
- Reduced sensitivity near the inspection surface.
- Primarily suited to weld applications.
- Requires correct setup and experienced interpretation.
- Often combined with PAUT for complete weld assessment.