Ultrasonic Velocity and Attenuation of Low-Carbon Steel at High Temperatures

Abstract

On-stream inspections are the most appropriate method for routine inspections during plant operation without undergoing production downtime. Ultrasonic inspection, one of the on-stream inspection methods, faces challenges when performed at high temperatures exceeding the recommended 52 °C. This study aims to determine the ultrasonic velocity and attenuation with known material grade, thickness, and temperatures by comparing theoretical calculation and experimentation, with temperatures ranging between 30 °C to 250 °C on low-carbon steel, covering most petrochemical equipment material and working conditions. The aim of the theoretical analysis was to obtain Young’s modulus, Poisson’s ratio, and longitudinal velocity at different temperatures. The experiments validated the theoretical results of ultrasonic change due to temperature increase. It was found that the difference between the experiments and theoretical calculation is 3% at maximum. The experimental data of velocity and decibel change from the temperature range provide a reference for the future when dealing with unknown materials information on site that requires a quick corrosion status determination.

The Relationship of Lignin and Crude Fiber in Rice Bran with Ultrasonic Wave Parameters

“…Previous research has shown that ultrasonic wave parameters (attenuation) can accurately be used to detect the physical properties of materials. Measuring turbine steam exhaust wetness (Zhu et al, 2023), particle size distribution of carbonyl iron powder (Wei et al, 2023), determine the material level, thickness, and temperature of carbon steel materials (Tai et al, 2023), measuring the surface roughness of materials (H. Liu et al, 2023), material measurement aluminum alloy 2219-O (S. Li et al, 2023), cavity content and density of polyester filaments (K. Liu et al, 2017), testing the porosity of composite laminates (Z. Li et al, 2014), detect Escherichia coli bacteria (Ravinder Reddy et al, 2001), metal-polymer composites (Hidayat et al, 2020) and detect contamination in the material (Bhagaspati et al, 2021;Khairurrahman et al, 2021;Salsabila et al, 2021).…”

Enhancing Turnaround Maintenance in Process Plants through On-Stream Phased Array Corrosion Mapping: A Review

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