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Close Visual Inspection (CVI)
Close Visual Inspection is a detailed and close up visual examination of welds/structures/vessels/
pipework. The qualifications applicable to CVI can be both PCN or CSWIP. 

Typically CVI would be used to identify areas requiring more in-depth inspection. Examples of its application could be identification of pipework likely to require further wall thickness checks (see Ultrasonic Testing), newly fabricated assemblies require CVI pre further NDT (MPI/UT), in-situ structural assemblies require a CVI to detect fatigue induced cracking prior to further NDT (ECI/MPI), etc.