NDT Methods Explained
How each non-destructive testing method works — the physics, the equipment, the procedure, what it detects and the codes that govern it. Looking to hire instead? See NDT services by method.
Inspector guide to eddy current testing — bobbin, array, surface, and pencil probes, ASME V Article 8, heat exchanger and coating measurement applications.
Read guideWorking inspector guide to MT — AC vs DC yokes, wet fluorescent vs dry powder, ASME V Article 7, ASTM E709, and real cost ranges on welds and castings.
Read guideField-tested guide to liquid penetrant inspection — Type I vs Type II, ASME V Article 6, dwell times, ASTM E165, and real cost ranges on stainless and aluminum.
Read guideWorking guide to phased array UT — focal laws, S-scan and E-scan, ASME Code Case 2235 substitution for RT, ASME V Article 4 Appendix V, and real cost ranges.
Read guideField-tested guide to industrial radiography — source selection, exposure math, ASME V Article 2, ASTM E1742 film practice, and 2025 cost ranges per shot.
Read guideWorking guide to time-of-flight diffraction — tip-diffraction physics, dead-zone management, ASME V Article 4 Appendix III, and pairing TOFD with PAUT.
Read guideWorking inspectors guide to ultrasonic testing — pulse-echo physics, dual-element thickness, shear-wave weld scans, ASME V Article 4, and real cost ranges.
Read guidePractical guide to visual NDT — direct VT, remote VT, borescope use, ASME V Article 9, AWS D1.1 §6.9, and acceptance criteria for welds and pressure equipment.
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