Magnetic particle inspection is used to help monitor the integrity of welded pipes and pressure vessels. This method was used for decades, primarily because of its portability and ease of use. It is a common industry practice to use specifically-designed oil and water-based carriers for magnetic particles, adding extra cost for chemicals and chemical waste disposal. In addition, this method also requires paint removal and repainting, adding additional cost to the inspection.
Eddy current inspection is an economical, nondestructive alternative to magnetic particle inspection. Eddy current inspection is fast, reliable, easy to use, and can inspect directly through painted surfaces. With eddy current, inspectors no longer have to strip and repaint pipes and vessels. As an added feature, eddy current makes it easy to record the defect length and depth.
The inspection process using eddy current technology is fast, and the preparation is kept to a minimum—no intensive cleaning or paint removal is required. Eddy current inspection is also effective in most weather conditions including rain, heat, and cold. For easy post-processing analysis and data archiving, setup files can be saved and recalled for the next job. In addition, report files can be easily created directly from the instrument.
Eddy Current Array (ECA) Solution — OmniScan® Instruments
Figure 1: The Omniscan MX flaw detector with the MagnaFORM probe.
Figure 6: A screen shot of the flaw detector’s measurement tools.
The probe’s flexible PCB technology combined with dynamic lift-off compensation technology enables the solution to detect defects in all areas of the weld.
Figure 7: The defects located during a weld inspection.
The OmniScan MX flaw detector features built-in reporting at the touch of a key. Reports can also be configured and customized by advanced users.
Archiving inspection data files is easy, simply press a key during acquisition or analysis to store the data on the instrument’s memory card.