Fluorescent penetrant inspection (PT)

In our laboratory we have 2 lines for performing PT checks, dedicated to specific industries that can meet specific customer needs.

Accredia 17025 and Nadcap accredited lines and qualified 2nd and 3rd level personnel are further guarantee of the quality of service that TEC Eurolab offers in this specific context.

AT28 Line - General Industry

Accredited ACCREDIA 17025 according to the UNI EN ISO 3452-1 specification, it has No. 3 immersion tanks in which to perform PT control with different techniques depending on the type of component being controlled. In particular, controls are performed with Color Contrast Penetrating Liquids with non-aqueous wet detector (Type 2, S1-2, Method A, Shape e) and Fluorescent Penetrating Liquids a with dry powder or non-aqueous wet detector (Type 1, S2-3, Method A-C, Shape a-d)

AT62 Line - Aeronautical/Aerospace Sector

NADCAP-accredited according to checklist AC7114/1 in accordance with ASTM E1417 / E1417M the line is prepared for testing according to technique Type 1 (Fluorescent Penetrating Liquids), S3 (High Sensitivity), Method A (water removable), Form a (dry powder detector).The AT62 line is also prepared for a second type of technique, which is currently under accreditation: Type 1 (Fluorescent Penetrating Liquids), S3 (High Sensitivity), Method D (post emulsifiable with hydrophilic emulsifier), Form a (dry powder detector). In addition to performing on-site inspections, TEC Eurolab also performs PT inspections at customer’s premises in accordance with UNI EN ISO 3452-1.

What does liquid penetrant testing consist of?

Inspection with Penetrating Liquids (identified by the acronyms: PT, FPI, DPI) aims to detect discontinuities surfacing on the surface of a part by the application and subsequent removal of a colored liquid on the surface of the sample. The liquid will be removed from the surfaces during the removal phase, while it will remain in any discontinuities on the surface of the part, revealing itself in the final inspection phase. The different sensitivities of the available penetrating liquids make this inspection extremely versatile and suitable for the inspection of a part during the different stages of the production process, starting from the raw product to the machined component.

Where are penetrating fluids applied?

The relative simplicity of operation and application of the PT method makes this inspection executable on numerous types of manufactured goods. Almost all manufacturing methodologies (Casting, Additive Manufacturing, Machining) and numerous alloys are inspectable with PT inspection. The main constraint lies in the need for a non-porous surface that does not absorb liquid, effectively making actual discontinuities on the part undetectable. PT inspection is applied in the Aerospace, Oil&Gas, Automotive and Manufacturing industries, with different techniques depending on part size, production status and the type of discontinuity sought.

Do you want to check the quality of your product with liquid penetrants?

FAQ - Penetrating Liquids

To what extent should the penetrant be removed without interfering with the test results?

The penetrant should be removed in the portion/part that is in excess on the surface, without exceeding the washing pressures to avoid removing also the PT penetrated in the defects.

Does the application of liquid penetrants and their respective detectors require special precautions to avoid corrosion of the parts under investigation?

Yes, especially on alloys susceptible to attack by halogenated agents (chlorides, sulfides..); indeed, there are classes of consumables in which these elements are kept below very small thresholds.

Do you need to check your component with penetrating fluids?

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