Magnetic particle inspection(MPI) is a method used for detection of flaws in ferrous materials, mostly for surface breaking defects. MPI is relatively fast and easy to apply. Surface preparation is not always as critical compare to Dye penetrant inspection. MPI is therefore one of the most widely utilized non-destructive testing techniques. A white contrast paint is often applied, before commencing the inspection, for better defect visibility. Fluorescent inks are used where high detection sensitivity is required or where the appliance of a white contrast paint is prohibited.


MPI is used to detect surface-breaking and near-surface flaws in ferromagnetic materials. It cannot, however, be used to detect deeply embedded flaws, nor can it be used on non-ferromagnetic materials, such as aluminium, copper or austenitic stainless steel.

MPI is often used to look for cracking at welded joints and in areas identified as being susceptible to environmental cracking (e.g. stress corrosion cracking or hydrogen induced cracking), fatigue cracking or creep cracking. Wet fluorescent MPI finds widespread use in looking for environmental damage on the inside of vessels.


Since 1994 we have built a reputable track record within the Offshore, Maritime, Waste to Energy and Renewable industries. We can carry out Magnetic Testing (MT/MPI) at many structures:

  • crane hooks
  • pad-eyes
  • inserts
  • gearboxes
  • pinions
  • pipes


Advantages of Magnetic Particle method of Non-Destructive Examination are:

  • It is quick and relatively uncomplicated
  • It gives immediate indications of defects
  • It shows surface and near surface defects, and these are the most serious ones as they concentrate stresses
  • The method can be adapted for site or workshop use
  • It is inexpensive compared to radiography
  • Large or small objects can be examined
  • Elaborate pre-cleaning is not necessary


  • High class NDT examinations.
  • Multidiciplined NDT operators.
  • Certified according all major AICS.
  • Certified according to DNV-GL CP 0484 offhore (formerly known as 402B).
  • 24/7.
  • Worldwide.
  • Flexible teams.
  • Validated NDT reports according mandatory regulations.
  • Cloud based reporting.


Disadvantages of the Magnetic Particle method of Non-Destructive Examination are:

  • It is restricted to ferromagnetic materials – usually iron and steel, and cannot be used on austenitic stainless steel and aluminium
  • It is messy
  • Most methods need a supply of electricity
  • It is sometimes unclear whether the magnetic field is sufficiently strong to give good indications
  • The method cannot be used if a thick paint coating is present
  • Spurious, or non-relevant indications, are probable, and thus interpretation is a skilled task


Our experienced project management team will ensure that your inspection requirements are completed on time and within budget. The magnetic particle inspections of your products and assets will be reported according the national and international standards. All our reports are digital and cloud based.