Which defects shall be removed by grinding when using automatic or semi-automatic welding?

When using automatic or semi-automatic welding processes, the identification and management of defects are critical to ensuring the integrity and quality of the weld. In this context, each of the identified defects—surface porosity clusters, bead starts, and high points—requires attention, and grinding is a suitable method for their removal.

Surface porosity clusters are small voids or gas pockets that can form at the surface of a weld. These imperfections can compromise the mechanical properties of the weld and may lead to failures if not addressed. Grinding these areas smoothens out defects and restores the continuity of the weld surface.

Bead starts are points where the weld bead begins and may not have the same consistency as the rest of the weld. These points can be prone to defects and unevenness. Grinding these areas helps achieve a uniform surface and consistent penetration, which is particularly important for the performance of the weld in service.

High points, or areas where the metal has built up excessively, can create stress concentrations and may also interfere with the fit-up of adjoining components. Grinding these protrusions ensures a flat and even surface that is critical for the proper assembly and operation of welded structures.

Therefore, since each of these defects can significantly impact the quality and performance of the weld, it