What is the method?
Visual Testing (VT) is the direct or assisted visual examination of a component, weld, structure, or coating to identify visible defects, deterioration, workmanship issues, dimensional concerns, or general condition. It may be performed with the naked eye or with aids such as weld gauges, mirrors, magnifiers, cameras, drones, and optical devices.
Application
Visual Testing (VT) is the direct or assisted visual examination of a component, weld, structure, or coating to identify visible defects, deterioration, workmanship issues, dimensional concerns, or general condition. It may be performed with the naked eye or with aids such as weld gauges, mirrors, magnifiers, cameras, drones, and optical devices.
Key Benefits
- The most accessible and cost-effective inspection method.
- Provides immediate feedback on condition and workmanship.
- Essential first-stage inspection before advanced NDT methods.
- Minimal equipment required for many applications.
Inspection Capabilities
- Directly assesses surface condition, workmanship, fit-up, alignment, distortion, leakage evidence, and visible deterioration in one activity.
- Essential for identifying obvious anomalies and screening priorities for additional NDT.
- Particularly useful for external corrosion morphology, weld profile non-conformance, support condition assessment, and missing or damaged components.
- Can be integrated into routine operating and maintenance inspection programmes.
Limitations
- Limited to visible and accessible surfaces.
- Does not detect internal defects.
- Strongly dependent on lighting, access, and inspector competence.
- Complex geometry can restrict line of sight.