What is Visual Testing ?
PRINCIPLE
Visual testing is done on finished products by a skilled and experienced inspector for detection, interpretation and acceptance of discontinuities. Visual testing requires the inspector to have in depth knowledge of the manufacturing process and the flaws that can be expected with such processes. Visual inspector must have a thorough knowledge of the applicable codes
EQUIPMENT
Magnifying glass, flash light, measurement gauges
APPLICATIONS
Visual testing has a range of applications that include inspection of welding, composites, coatings etc. Welding inspection includes checking for proper fit prior to welding, misalignment, weld reinforcement, weld defects such as slag, porosity, undercut, cracks etc. Composite inspections look for deformities, impact damage and blistering.
INDUSTRY CODES
- AWS D1.1 for structural weld inspections. See Table 8.1
- ASME VIII, div 1 for pressure vessels
TRAINING
- VT Level II, Course no – NDT-101
- Duration – 24 hours