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Steel structure building welding inspection Visual Testing (VT) is the foundation of non-destructive testing.
27-06-2023
Visual testing (VT), also known as visual inspection, is the foundation of non-destructive testing (NDT) and is primarily used to detect surface defects in materials. In current engineering applications, VT testing can often detect some obvious problems, such as leaks, corrosion, and misalignment. Additionally, VT testing can effectively confirm the necessity of local advanced NDT testing.
In welding, VT testing mainly detects surface defects and dimensions. The main content of VT testing includes whether there are cracks, porosity, slag inclusions, weld spatter, lack of fusion, lack of penetration, and undercutting on the surface of the weld, as well as the appearance, height, and size of the weld bead.
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