
We offer on-site magnetic particle inspection services using yoke type prod type and coil type magnetizing equipment, dry powder, wet magnetic particles & wet fluorescent magnetic particle technique.
This NDT method is accomplished by inducing a magnetic field in a ferromagnetic material and then dusting the surface with iron particles (either dry or suspended in liquid).Surface and near-surface flaws produce magnetic poles or distort the magnetic field in such a way that the iron particles are attracted and concentrated. This produces a visible indication of defect on the surface of the material. Therefore, the method is most applicable for detecting the surface or sub-surface defects. Magnetic particle can be applied in various types depending on the applications required. It could be wet, powder or fluorescent.
This NDT method is accomplished by inducing a magnetic field in a ferromagnetic material and then dusting the surface with iron particles (either dry or suspended in liquid).Surface and near-surface flaws produce magnetic poles or distort the magnetic field in such a way that the iron particles are attracted and concentrated. This produces a visible indication of defect on the surface of the material. Therefore, the method is most applicable for detecting the surface or sub-surface defects. Magnetic particle can be applied in various types depending on the applications required. It could be wet, powder or fluorescent.
Applications :
Advantages :
Limitations :
- Most weld discontinuities open to or near the surface
- Most suitable for cracks, laps, seams, voids, pits, subsurface holes, and other surface or slightly subsurface, discontinuities in ferromagnetic materials
Advantages :
- Relatively economical and expedient
- Test equipment is considered portable
- Unlike liquid penetrant, magnetic particle can detect some near surface discontinuities
- Can inspect through thin coatings
Limitations :
- Application only to ferromagnetic materials as well as to surface or near-surface flaws
- Parts should be clean before and after inspection
- Thick coatings may mask rejectable indications
- Some applications require parts to be demagnetised after inspection
- Magnetic particle test requires use of electrical energy for most applications
- Some potential for arc strikes on surface

- Infrared Thermography
- Remote Visual Inspection
- Thickness Mapping of Boiler Tubes
- Time of Flight Diffraction (TOFD)
- Ultrasonic Phased Array
- Ultrasonic Flaw Detection
- Recordable UT
- Ultrasonic Thickness Gauging
- High Temperature Gauging
- Oxide Scale Measurement
- Magnetic Particle Inspection
- Liquid Penetrant Testing
- Onsite Hardness Testing
- Coating Thickness Measurement
- Material Sorting & Tube Testing
NDTS India (P) Limited
619 & 620, The Great Eastern Galleria
Plot No. 20,Sector 4, Nerul
Navi Mumbai - 400 706.
619 & 620, The Great Eastern Galleria
Plot No. 20,Sector 4, Nerul
Navi Mumbai - 400 706.
Tel. : + 91-22-6138 0600
+ 91-22-2770 3913
+ 91-22-2770 3923
+ 91-22-2772 9077
Fax : + 91-22-2770 3903
Email : info@ndts.co.in
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