Liquid Penetrant Testing (PT)
Liquid Penetrant Inspection (also called Dye Penetrant Testing or Penetrant Testing — PT/LPI) is a nondestructive testing method for revealing surface-breaking defects in non-porous materials. A low-surface-tension liquid penetrant is applied to the part, allowed to soak into discontinuities, excess penetrant is removed, and a developer is applied to draw out trapped penetrant and form visible indications under appropriate lighting.
Our PT Services
At Twins Industrial Services, our liquid penetrant testing personnel receive comprehensive training, skill development and certification to ensure the highest quality results. The effectiveness of our testing is determined by the dedication of our technicians, thorough cleaning and preparation of test objects, and adherence to proper materials and procedures.
Visible Dye Penetrant
A nondestructive examination technique that involves applying a visible dye penetrant to the surface and allowing it to enter open-to-surface discontinuities. This method is commonly used to inspect welds, castings, forgings, and machined components for surface-breaking defects.
Fluorescent Penetrant (UV)
A high-sensitivity penetrant testing technique using fluorescent penetrants inspected under ultraviolet (UV-A) lighting in controlled lighting conditions. This method provides enhanced contrast and is well suited for detecting fine surface-breaking discontinuities.
Penetrant Removal Systems
Penetrant removal methods are selected based on component geometry, surface condition, and client or code requirements. Available systems include:
• Solvent-Removable
• Water-Washable
Ready to schedule a LP inspection?
Contact our team for quotes, availability, and safety planning.