Visual testing remains the most popular NDT method across all industries. It involves taking a thorough look at the specimen and finding defects that are visible to the naked eye.
It is a quick and feasible method of tracking product quality at every stage of the manufacturing process as well as for those products that are in service.
With visual inspections, we can detect corrosion, cracks, welding defects, deformation, etc. All we need are simple instruments such as rulers and gauges.
Advantages of visual testing:
- Easy to train
- Minimal or no downtime
- Minimum or no part preparation needed
Disadvantages of visual testing
- Only works with surface defects
- Possible misinterpretation of flaws
- Cannot detect minute defects without additional optical instruments
With 31 surface parameter settings available the Elcometer 7062 surface roughness tester can display all parameters that comply to National & International Standards