About Non-Destructive Testing (NDT)

NDT is a very reliable and respected way of determining a components structural integrity. Various methods can be used together or individually to map out exactly ‘non metallic inclusions’ in parts or cracks in welds.

It can be very cost effective and carried out with speed, safely and efficiency.

Common NDT methods include:

  • Ultrasonic
  • Magnetic-particle
  • Liquid penetrant
  • Eddy-current testing
  • Radio-graphic interpretation 
  • Welding inspection 

Dye Penetrant Inspection

Dye penetrant inspection uses dyes to find surface discontinuities in materials. Excess penetrant ‘bleeds out’ from a material to show discontinuities.

Ultrasonic Inspection

Ultrasonic inspection is an efficient and relatively good method for determining subsurface indications.  Ultrasound uses high-frequency waves to detect discontinuities in materials.

Magnetic Particle Inspection

Magnetic particle inspection is used for locating surface and near surface discontinuities in ferromagnetic materials. This method is quick and reliable.

Welding Inspection

Welding inspection is the use of technological methods and actions to test or assure the quality of welds, and secondarily to confirm the presence, location and coverage of welds.

Eddy Current Inspection

Eddy current inspection uses electrical currents to induce a magnetic field in conductive materials. A discontinuity causes a distortion in the field. Eddy Current can be done through paint.

Radiographic Interpretation

Radiographic inspection consists of radiographic film being placed under a sample. The sample is then exposed to radiation; the radiation passes through the sample, and exposes the film. Discontinuities in the sample affect the exposure of the film.