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 VT – Visual Inspection

 

Sight check

is an optical inspection of a product or part for defects and blemishes as a conventional step in the production process at the end or after completion of the manufacturing of a product for quality control reasons. Sight checks are also performed on operating parts. Visual inspection as a non-destructive testing method is standardised according to DIN standard DIN EN 13018 (General principles of visual inspection).

This standard is distinguishing between:

  • Direct visual inspection without any additional tools (inspection of the object with the naked eye).
  • Direct visual inspection including additional tools (optical devices e.g. magnifying glasses, endoscopes, mirrors).
  • Indirect visual inspection (with cameras, videoscopes etc.).

The distinction between direct and indirect visual inspections is defined in the standard as follows:

  • Direct visual inspection = Visual inspection without interruption of the optical path between inspected object and the eye of the observer.
  • Indirect visual inspection = Visual inspection with interruption of the optical path between inspected object and the eye of the observer, this means transformations of the light beam to a different form of energy, thus in electrical information (camera).

Typical defects that should be detected by a visual inspection
are mechanical damage (scratches, cracks), dirt settlings, assembly errors, feathering, end-crater-cracks and undercuts. Alongside colour changes (annealing colours at e.g. austenitic steels), surface roughness etc. can be discovered effectively.

 

 

 

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ISO 9001: specifies the minimum requirements of a quality management system, which have to be assured in order to offer products and services which fulfil customer’s and official requirements.

 

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CSW-Folder

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Tel: +43 (0) 3357-420-31

4031 Linz, Austria
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Tel: +43 (0) 732 698 933 08

E-Mail: office@csw-gmbh.at
Internet: www.csw-gmbh.at