Non-destructive testing -- Liquid penetrant inspection -- Means of verification
These tests are intended to ensure that the penetrant system works correctly and that there has been no harmful deterioration of the process materials during service. Generally, the frequency of checking penetrant materials and black light sources will depend on the frequency and conditions of usage. Specific and maximum intervals should be recommended by the manufacturer.
A standard is reviewed every 5 years
Revisions / Corrigenda