What is primarily assessed during a visual inspection of welds?

During a visual inspection of welds, the primary focus is on identifying surface discontinuities. These discontinuities can include porosity, cracks, undercutting, lack of fusion, and undesirable profiles. These defects are critical to the integrity of the welded joint, as they can lead to failure under stress or environmental conditions.

Visual inspections are often the first line of defense in ensuring quality welding practices. Inspectors use their eyes to assess the weld's surface for any visible flaws, which is essential because many weld defects may not be apparent through other inspection methods without further non-destructive testing.

Evaluating the weight of the weld, the color of the weld bead, or the flexibility of the welded joint may provide some information, but they do not directly assess the integrity of the weld like checking for surface discontinuities does. Therefore, focusing on the presence of these discontinuities is the most crucial aspect of a visual inspection in the context of welding quality assurance.