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EnglishWhat is Visual Testing (VT)?
Visual Testing (VT) is one of the most fundamental and widely used methods in non-destructive testing (NDT). In this method, components are inspected visually to detect surface defects and irregularities without causing any damage to the tested part.
During visual inspection, defects such as cracks, deformation, corrosion, surface damage, welding defects, and other visible imperfections can be detected. Visual testing is often performed as the first step in an inspection process, providing a quick and effective assessment of the overall condition of a component.
Visual testing can be performed in two different ways:
Direct Visual Testing
This method involves inspecting a component directly with the human eye when the inspection surface is clearly visible to the inspector.
This method involves inspecting a component directly with the human eye when the inspection surface is clearly visible to the inspector.
Remote Visual Testing
When direct access is not possible, optical devices such as cameras, borescopes, videoscopes, or endoscopes are used to inspect areas that are difficult to reach.
When direct access is not possible, optical devices such as cameras, borescopes, videoscopes, or endoscopes are used to inspect areas that are difficult to reach.
Proper visual inspection requires certain conditions to be met, including adequate lighting, proper viewing angle, and suitable inspection distance. Many international standards recommend a minimum illumination level of 500 lux for effective visual inspection.
Visual testing is widely used in weld inspections, castings, forgings, pressure vessels, pipelines, aerospace components, and general manufacturing processes.
NEXSEN provides engineering solutions and inspection equipment designed to support industrial quality control and non-destructive testing applications.
