Inspection Overview

　　Under the growing adoption of Risk-Based Inspection (RBI) strategies, pipelines are classified according to risk levels. When critical wall thickness data is required for insulated pipelines, conventional inspection methods often involve significant costs due to insulation removal and reinstallation.

　　Guided Wave Ltd. utilizes advanced Pulsed Eddy Current Testing (PECT) technology to efficiently collect inspection data and provide real-time feedback without removing surface insulation. This approach significantly reduces insulation removal and installation costs while penetrating protective barriers to provide reliable quantitative wall thickness data. It enables companies to achieve an optimal balance between safety protection and budget management, enhancing overall asset risk control within industrial facilities.

　　As an innovative stand-off thickness measurement and corrosion imaging technology, PECT operates by transmitting square-wave pulse signals from a probe into the pipeline wall, generating induced eddy currents within the metal. After the signal transmission stops, the transducer immediately receives and analyzes the decay rate of the magnetic field generated by the eddy currents. Since thicker walls result in slower magnetic field decay while thinner walls caused by corrosion lead to faster decay, the system can evaluate remaining metal wall thickness and generate corrosion images without damaging the structure. This technology helps companies establish comprehensive asset integrity management records.

※ Important Notes ※

　　This technology is applicable to pipelines or vessels with wall thicknesses below 60 mm. It can penetrate up to 150 mm of non-magnetic insulation materials, and the surface temperature at the probe contact area must be below 60°C.