Testing Requirements

Testing Requirements

The luminance at the surface shall be minimum 500 lx. If required to obtain a good contrast and relief effect between imperfections and background, an additional light source should be used.
For performance of direct inspection, the access shall be sufficient to place the eye within 600 mm of the surface to be inspected and at an angle not less than approximately 30degree. If not otherwise agreed all weld connections in question should be 100% visually inspected.
The testing volume shall as a minimum cover the zone which includes welds and parent metal for at least 20 mm on each side of the weld. In case of doubt, visual testing should be supplemented by other non-destructive testing methods for surface inspections.
The weld surface shall be free of weld spatter, slag, scale, oil, grease, heavy and loose paint or other surface irregularities which might avoid imperfections from being obscured. It can be necessary to improve the surface conditions e.g. by abrasive paper or local grinding to permit accurate interpretation of indications.

originally found here:- http://www.ndtindia.org/visual-inspection.html

Visual Inspection Equipment

Visual Inspection Equipment

The following equipment may be needed:

·         Mirrors (especially small, angled mirrors)

·         Magnifying glasses, eye loupes, multi lens magnifiers, measuring magnifiers

·         Microscopes (optical and electron)

·         Optical flats (for surface flatness measurement)

·         Borescopes and fiber optic borescopes

·         Optical comparators

·         Photographic records

·         Closed circuit television (CCTV) systems (alone and coupled to borescopes/microscopes)

      originally found here:-http://www.ndtindia.org/visual-inspection.html

Services for Visual Inspection

Services for Visual Inspection

·         Inspection of suspicious areas

·         Predictive maintenance applications

·         Full inspection recording

·         Consultancy Service

·         Reports

·         Training

    originally found here:- http://www.ndtindia.org/visual-inspection.html

Visual Inspection

Visual Inspection is one of the most widely used Non-Destructive Testing methods for the detection of discontinuities before they cause major problems, e.g. poor welding, surface defects, corrosion pits, general condition, degradation, blockages and foreign materials.

Visual Inspection means the inspection of equipment and structures using a combination of human senses such as vision, hearing, touch and smell. Visual Inspection is sometimes carried out in conjunction with devices such as a low power magnifying glass, boroscopes, fiberscopes, digital video borescopes, camera systems and robotic crawler systems.
originally found here:- http://www.ndtindia.org/visual-inspection.html