Which method allows for verification that weld repairs meet compliance?

Magnetic particle testing is a non-destructive testing method that is particularly effective for detecting surface and near-surface discontinuities in ferromagnetic materials. This technique involves applying a magnetic field to the area being inspected, followed by the application of magnetic particles. If there are any flaws or cracks in the weld, the magnetic field will cause the particles to accumulate at these discontinuities, making them visible under proper lighting conditions.

Using this method for verifying weld repairs ensures that the integrity of the weld has been maintained and that there are no defects that could compromise safety or compliance with industry standards. This level of inspection is often necessary in critical applications, where the soundness of welds is paramount.

In contrast, while visual inspection can identify some surface imperfections, it may not detect subsurface flaws, and thus does not provide the same level of assurance regarding weld quality. Talley marking is more related to tracking and inventory management rather than assessing weld quality. Thermal imaging, while useful for identifying heat patterns and certain types of defects, is not specifically targeted for weld integrity checks like magnetic particle testing is.