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Magnetic Particle Inspection of Large Castings

Large castings are used for manufacturing of power generation equipment.

MPI (Magnetic Particle Inspection) is crucial for large castings due to its non-destructive nature and defect-detection capabilities. It ensures structural integrity by identifying surface and near-surface flaws, like cracks and inclusions, preventing costly rework and potential failures. Its efficiency in complex geometries saves time and supports compliance with industry regulations. By safeguarding quality, enhancing safety, and reducing risks, MPI plays a pivotal role in maintaining the reliability of large castings in industries such as manufacturing, aerospace, and energy. 

It is not possible to load these castings on any magnetic particle testing machine. So an equipment is required which can be taken to the site of the casting to perform defect detection.

Mobile current generators are used to fulfill this purpose. Prods made from copper are attached to the cables coming out from the current generator.

Portable Crack Detection Machine

An operator presses these prods at two points on the surface of the casting. The distance between these points is limited by the amount of current used. Current passes between these two points and the area under consideration is magnetized.Testing the casting is a long & tedious process. The prods check only a small portion of the casting at one time. So, the operator hasto ensure that the entire surface of the casting is covered. He can divide the surface using chalks or markers& then check each marked area &write the result of testing on the area. Generally power generators with 3000A to 4000A capacity are used for this purpose.

Mobile Portable Current Generators

Besides, direct magnetization, these current generators can also be used for cable wrap magnetization. Cable wrap magnetization is used to generate longitudinal magnetic field in the part so that transverse defects can be detected.

The formulas for calculation of current for prod method & cable wrap magnetization are given is ASTM E1444 & ASTM E709.

suitable products

Standard MPI Machines

Engineered for precision and efficiency, the Standard Bench Type Magnetic Particle Testing Machine is suitable for entry level testing.

PLC Controlled MPI Bench

With PLC Controlled bench type Magnetic Particle Inspection Machine, you can accurately control the process parameters for reilable results.

Multidirectional MPI Bench

The ultimate solution for robust non-destructive testing, this machine offers multi-directional magnetization for inspection in all directions in one shot..


Demagnetizers stand as a key tool in maintaining excellence in production, with the flexibility to handle different materials and magnetism levels, coupled with energy-efficient and user-friendly design.



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