Visual Testing (VT) for welding, casting & st ...

Visual testing (VT) is a non-destructive method of inspecting materials and structures for defects. It's a common technique used in many industries, including automotive, aerospace, petrochemical, power generation, and structural steel. Here's some information about VT:How it worksVT uses visual observation, optical instruments, and measuring devices to detect defects like cracks, corrosion, and deformation. It's usually done with the naked eye or magnifying glasses up to 7x, but magnifiers up to 20x can be used in doubtful cases. When to use itVT can be used at various stages of the fabrication or maintenance process, including before, during, and after welding. What to look forVT can detect defects like slag, underfills, undercuts, extra reinforcement, cracks, porosity, burn through, and weld finish. What to prepareBefore performing VT, the material's surface should be cleaned of rust, scale, dirt, paint, oil, metal spray, and other impurities. What tools to useVT can use a variety of tools, including rulers, gauges, cameras, mirrors, magnifiers, and boroscopes. What's requiredVT requires good eyesight, either natural or corrected. It also requires a minimum of 150 lux of light, increasing as the seriousness of discontinuities increases. ...