The study finds a new approach to assess wall thickness eccentricity in pipes, indicating improved durability with a use of polyvinylidene fluoride.
Deviation from the nominal wall thickness of a pipe—both during manufacturing and in operation—is a critical factor affecting the durability of equipment. This study proposes a model of acoustic wave propagation across a pipe cross-section with eccentricity, which forms the theoretical basis for a method of integral assessment of wall thickness non-uniformity in small-diameter pipes. The method is implemented using a specialized flexible piezoelectric transducer based on polyvinylidene fluoride (PVDF) on several samples of seamless pipes with varying thicknesses, and is validated by the results of local ultrasonic thickness measurements.
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V.V. Muraviev (2025) studied this question.
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