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Visual inspection and gaging is one of the varieties of non—destructive testing methods, primarily based on capabilities of vision, test object is examined in visible light. The method is managed using the simplest measuring tools such as: magnifying glass, tape measure, bridge cam gauge, caliper, etc. It can be used to detect: corrosion damage, cracks, defects in the material and surface treatment, etc. It is also carried out with the help of optical devices, which enables to significantly expand the limits of natural eye capabilities.
Visual inspection and gaging of, for example, polymer and composite materials, welded joints, structures and technical devices is carried out in accordance with the requirements of specially developed documentation, for example, RD 03-606-03. The instructions are based on the safety rules approved by Gostekhnadzor.
Scope of application:
- At the stage of input control to detect surface defects of the material (cracks, delaminations, nicks, slag inclusions, blowholes, etc.), and deviations of workpiece geometric dimensions from original ones.
- When preparing parts for assembly and welding.
- When welding is accomplished, or at certain stages of it - to detect surface defects and irregularities in a welded joint (blowholes, pores, worm-holes, undercuts, burns, swellings, etc.),and when a weld deviates from standard requirements.
- At the stage of technical diagnostics.