Left: Penetrant applied to Root Pass. Right: Close up of developer on Final Cap Pass. Liquid Penetrant Testing: The Process Is the Product When a weld fails in a nuclear facility or a pressure-retaining component develops an undetected crack, the consequences aren't measured in repair costs alone — they're measured in downtime, regulatory exposure, and risk to personnel and public safety. That's why how  a non-destructive examination is performed matters just as much as t