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Met-L-Chek MPI-86G | Gray Dry Method Magnetic Particles
High-Contrast, Heat-Resistant Inspection Powder for Visible MPI
Met-L-Chek MPI-86G is a high-quality, dry-method magnetic powder designed for visible Magnetic Particle Inspection (MPI). Formulated with a specific light-gray pigment, it provides exceptional contrast against dark, scaled, or oxidized surfaces where black or red powders may be difficult to see. Engineered for versatility, MPI-86G is capable of operating at extreme temperatures, making it the ideal choice for in-process weld inspection and heavy industrial maintenance.
Key Performance Features
High-Contrast Visibility: The pale gray color offers a sharp visual "signal" on dark backgrounds, reducing inspector eye strain and improving the probability of detection (POD) for surface and near-surface flaws.
Extreme Temperature Range: Qualified for use on hot surfaces up to $800$°F ($426$°C), allowing for inspection immediately after welding or on operational piping without waiting for a total cool-down.
Optimized Particle Gradation: Features a precise blend of particle sizes ($15$–$160$ µm) to ensure excellent mobility and sensitivity to both large cracks and fine, tight discontinuities.
Free-Flowing Formula: Specially treated to resist clumping and moisture absorption, ensuring a uniform "dusting" when applied with manual or pneumatic powder blowers.
Superior Sensitivity: Boasts an SAE Relative Sensitivity of 6, providing high-fidelity mapping of magnetic flux leakage fields.
Technical Specifications & Compliance
| Feature | Specification |
| SKU / Part Number | 29180-0011 |
| Color | Light Gray |
| Form | Fine Powder |
| Density | $2,500$ g/L |
| Particle Size | $15$ – $160$ microns |
| Max Operating Temp | $800$°F ($426$°C) |
| Weight | $6$ lbs ($3$ kg) |
Industry Standard Compliance
MPI-86G is formulated to meet or exceed the requirements of:
AMS 3040: Magnetic Particles, Nonfluorescent, Dry Method.
ASTM E-709 & ASTM E-1444: Standard Guide/Practice for Magnetic Particle Testing.
ASME B&PVC Section V: Article 7 & 25.
NAVSEA 250-1500-1 & T9074-AS-G1B-010/271.
API RP 5A5: Field Inspection of New Casing, Tubing, and Plain-End Drill Pipe.
Ideal Applications
Field Welding: Rapid inspection of root passes and completed weld beads on pipelines and structural steel.
Foundries & Forgings: Detection of surface laps, cold shuts, and sand inclusions in large castings.
Refineries: In-service inspection of high-temperature pressure vessels and piping.
Infrastructure: Safety-critical checks on bridge girders, cranes, and heavy machinery.
