[2B5] High-definition array capability addition to RFT for ferromagnetic tubing analysis
S Savard, L Burchell, A Grégoire, V Shahsavari and J Yadav
Eddyfi Technologies, Canada
Presented by L Hallal, Eddyfi Technologies, Canada
Conventional remote-field testing (RFT) is widely used for inspecting ferromagnetic tubing in heat exchangers, yet it faces significant limitations in defect detection and accuracy. This paper highlights the potential of the remote-field array (RFA) method as a novel approach to ensure more accurate and reliable inspections of heat exchanger tubes, which is critical for maintaining operational integrity and safety in various industrial settings. A comprehensive experimental study conducted on a carbon steel tube with various manufactured defects demonstrates the enhanced detection capabilities of Eddyfi’s RFA probe, particularly for small defects, due to the improved resolution provided by the array sensors. Results indicate that the RFA technique significantly outperforms conventional RFT, especially near structural components. Laboratory testing reveals that the RFA method is able to detect through-wall holes that are approximately 60-70% smaller in volume, and flat-bottom holes that are approximately 30-35% smaller in volume, than RFT. Additionally, this study demonstrates an approximate 10 dB improvement in signal-to-noise ratio with RFA compared to RFT for small defects.
Conventional remote-field testing (RFT) is widely used for inspecting ferromagnetic tubing in heat exchangers, yet it faces significant limitations in defect detection and accuracy. This paper highlights the potential of the remote-field array (RFA) method as a novel approach to ensure more accurate and reliable inspections of heat exchanger tubes, which is critical for maintaining operational integrity and safety in various industrial settings. A comprehensive experimental study conducted on a carbon steel tube with various manufactured defects demonstrates the enhanced detection capabilities of Eddyfi’s RFA probe, particularly for small defects, due to the improved resolution provided by the array sensors. Results indicate that the RFA technique significantly outperforms conventional RFT, especially near structural components. Laboratory testing reveals that the RFA method is able to detect through-wall holes that are approximately 60-70% smaller in volume, and flat-bottom holes that are approximately 30-35% smaller in volume, than RFT. Additionally, this study demonstrates an approximate 10 dB improvement in signal-to-noise ratio with RFA compared to RFT for small defects.
