Magnetic Particle Inspection (MPI) is a proven non-destructive testing (NDT) method used to detect surface and near-surface discontinuities in ferromagnetic materials such as carbon steel and certain stainless steels. At Acez, we perform professional magnetic particle testing to identify cracks, laps, seams, inclusions, and fatigue-related flaws that may compromise the structural integrity of thermowells, sensor housings, and welded assemblies. This fast and reliable inspection technique enhances quality assurance and ensures components are safe for demanding industrial service.
The process works by magnetizing the component to create a uniform magnetic field throughout the material. Any discontinuity disrupts this field, causing magnetic flux leakage at the defect location. When fine iron particles are applied, they gather at these leakage points, forming clear visual indications of flaws.
Our magnetic particle inspection process includes:
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Component Magnetization – Establishing a controlled magnetic field within the material.
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Application of Magnetic Particles – Dry or wet fluorescent particles applied for high-visibility detection.
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Flux Leakage Identification – Detection of surface and slightly subsurface discontinuities.
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Inspection of Welds & Heat-Affected Zones – Focused evaluation of high-stress regions prone to cracking.
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Standards-Based Evaluation & Reporting – Documentation aligned with industry inspection requirements.
Compared to dye-penetrant testing, MPI testing is faster for ferromagnetic materials and can detect a broader range of flaw types, including shallow subsurface cracks. It is especially effective for components exposed to cyclic stress, vibration, and fatigue loading where early crack detection is critical.
Magnetic particle inspection is essential for carbon steel thermowells, pressure-retaining welds, structural supports, and stress-bearing assemblies operating in industrial environments.
Ensure the integrity of your ferromagnetic components before they enter service. Contact Acez today to schedule professional magnetic particle inspection and safeguard your critical instrumentation systems.
