Pipeline Inspection - Visual Inspection

Direct visual inspection.

The direct visual examination can usually the eye to be about 24 in (609.6 mm) and angle vision no less than 30 degrees from the surface to be examined. Mirrors can be used to improve viewing angle, like magnifying glasses or magnifiers. It should be sufficiently illuminated area. Lighting can be natural or artificial (350 lux)

Control visual examination.

In some cases, the visual inspection of the examination can substitute for direct examination. Control visual examination can be seen through lenses, fiber optics, cameras, etc..

Procedure.

A written procedure can contain at minimum, a description of how it was done the visual examination conditions available for time of test methods surface preparation and failing that,
control method used, lighting provided, equipment or instruments used, Delos besides making acceptance criteria refer to the code used. In some cases it is preferable to relate the
procedure to a specific component in this case the pipe weld inspection high density polyethylene (HDPE).