Nondesctructive Testing (NDT) Typical Nondestructive Testing Services Spark testing of Vessel and Tank Linings including Glass Lining, Polyester, Glass Flake Epoxies, GRP, etc.Dye Penetrant Inspection of stainless steel vessels and pipework.Magnetic particle inspection of carbon steel surfaces, welds, etc.Ultrasonic thickness testing of metals, including pipework, tanks, steel etc.Site Corrosion Surveys.Risk Based Inspection (RBI) of a company's assets such as tanks, pipelines etc