TOFD (Time of Flight Diffraction) is an advanced ultrasonic testing method used to detect and characterize defects in materials and welds. It leverages ultrasonic wave diffraction for high precision, comprehensive coverage, and rapid inspection.
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Typical Applications for TOFD:

Weld quality control – detecting cracks, lack of fusion, and incomplete penetration

Inspection of pressure vessels and pipelines – monitoring wall thickness, corrosion, and cracks

Material inspection – examining steel, aluminum, and other alloys for internal flaws

Corrosion monitoring – in industrial structures, tanks, and pipelines

Energy sector – inspecting critical components like boilers and heat exchangers for operational safety

Oil & gas industry – monitoring welds and material integrity in both offshore and onshore installations
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Advantages of TOFD:
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High precision – capable of detecting and characterizing very small defects

Comprehensive coverage – inspects full weld volume with fewer scans

Fast and efficient – able to cover large areas in a short time

Non-destructive – the inspected material remains intact

TOFD is a vital tool to enhance safety, quality, and compliance in demanding industrial environments.