An Eddy Current Testing Platform System for Pipe Defect Inspection Based on an Optimized Eddy Current Technique Probe...

Area of Science:

• Materials Science
• Non-Destructive Testing
• Sensor Technology

Background:

• Eddy Current Testing (ECT) is crucial for non-destructive testing of conductive materials.
• Ensuring the safety and integrity of industrial structures like oil and gas pipelines relies on effective non-destructive ECT.
• Ferromagnetic pipes present unique challenges for internal crack inspection.

Purpose of the Study:

• To introduce a novel ECT probe design integrated with a distributed ECT inspection system (DSECT).
• To enable efficient crack inspection on the inner surfaces of ferromagnetic pipes.
• To optimize probe design parameters for enhanced performance.

Main Methods:

• Development of a DSECT system incorporating giant magneto-resistive (GMR) sensors, a pneumatic system, and a rotating magnetic field excitation source.
• Numerical optimization using the desirability approach to fine-tune probe diameter, excitation coil, and GMR sensor array.
• Mathematical modeling using Response Surface Methodology (RSM) to predict axial and circumferential defect detection.

Main Results:

• The DSECT system demonstrates modularity and flexibility, accommodating various magnetic transducers and signal types.
• Optimized probe design parameters were determined for effective crack detection.
• The system proved highly efficient in inspecting a 70 mm carbon steel pipe with artificial defects.

Conclusions:

• The novel ECT probe design integrated with the DSECT system is highly efficient for detecting cracks in ferromagnetic pipes.
• The DSECT system offers significant advantages in terms of flexibility and adaptability for non-destructive testing applications.
• This technology contributes to improved safety and integrity assessment of critical industrial infrastructure.