Liquid Penetrant Testing (PT)


Liquid Penetrant Testing (PT)

PT is an NDT method that is excellent to detect surface breaking flaws. A bright red dye is applied to the surface before being cleaned and thereafter being painted with a white developer. This allows it to penetrate into any flaws, making it much easier to detect with the naked eye.

We typically use this technique for detecting:

  • Fatigue Cracks
  • Grinding Cracks
  • Porosity
  • Laps
  • Seams
  • Pin holes in welds
  • Lack of fusion along the edge of the bond line

PT involves the application of a liquid penetrant to the surface of the material being tested. The penetrant is allowed to dwell on the surface for a certain period of time, allowing it to seep into any surface defects through capillary action. Excess penetrant is then removed, and a developer is applied to draw out the penetrant from the defects, making them visible. The technician then visually inspects the surface for indications of defects, which appear as bright, colored lines or spots.

PT is a cost-effective and widely used method for detecting surface defects that may not be visible to the naked eye. It is relatively simple to perform and can provide rapid results. However, PT is limited to detecting surface defects only and cannot detect defects below the surface.

At ESNADVB, we offer liquid penetrant testing (PT) services using qualified and experienced technicians and state-of-the-art equipment. Our PT services can help clients to identify surface defects in their materials or components, assess their integrity, and make informed decisions about their repair or replacement. We are committed to providing the highest quality PT services to our clients and to continuously improving our techniques and technology to stay at the forefront of the industry.

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ESNADVB for Reliable NDT, Heat Treatment, and Technical Diagnostics Services

We provide high quality, reliable and competitive services
according to Clients` expectations and projects requirements

ISO 9001-2016, ISO 45001-2019, ISO 14001-2016 accredited company

NCA Accreditation as per ISO 17025

Employees qualified as per ISO 9712-2012 / PCN / ASNT / CSWIP

Licensed to carryout all advanced / conventional NDT and PWHT

Licensed to operation, transport and storage of Gamma & X-Ray Materials

12 years of Safe services with zero LTI