What procedure should be followed if indications are observed during PT?

When indications are observed during a Liquid Penetrant Testing (PT) procedure, further investigation and evaluation to determine the nature of those indications is the appropriate course of action. This process is crucial because indications can potentially represent surface-breaking defects, such as cracks, porosity, or other discontinuities that may compromise the integrity of the component being tested.

By performing further investigation, the operator can assess the severity and extent of the indications, possibly using additional methods such as magnetic particle testing or visual inspection, to confirm whether these observations indeed point to a defect that requires rectification. This careful analysis helps to ensure that any potential risks to safety or performance are addressed promptly and effectively.

Immediate removal of a defect without proper evaluation may lead to unnecessary material loss or misdiagnosis of surface issues. Similarly, ignoring the indications or merely documenting them for later checks does not address the immediate need for assessment and could risk compromising the reliability and safety of the structure being tested.