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What is TOFD vs PAUT: Key Differences Explained about?

TOFD uses two probes on either side of a weld to detect defects by measuring the diffraction of ultrasonic waves at defect tips. PAUT uses a phased array probe with multiple independently pulsed elements to focus beams and generate B-scans, C-scans, and S-scans of welds. Both techniques can detect and size defects but PAUT has advantages of beam steering and focusing capabilities compared to TOFD. Code cases allow substitution of TOFD and PAUT for radiography on heavy wall pressure vessel welds and nozzles.

Author

Rahul Dubey

Language

EN