Iso 8502-3 Dust Level Chart Jun 2026

: The captured dust is visually compared against pictorial references to determine its quantity and inspected under magnification to determine its particle size . ISO 8502-3 Dust Level Ratings

: Significant dust covering large portions of the tape. Rating 5 : Dense dust covering the entire tape. 2. Dust Size Classes Particle size is also classified from 0 to 5 . Description Size Range 0 Particles not visible under 10x magnification 1 Particles visible under 10x magnification 2 Particles visible with normal vision 0.1 mm to < 0.5 mm 3 Small particles 0.5 mm to < 1.0 mm 4 Medium particles 1.0 mm to 2.5 mm 5 Large particles Practical Application & Reporting iso 8502-3 dust level chart

The chart ignores chemical nature (e.g., soluble salts, chlorides, zinc dust). You can have “size 3, quantity 1” but still fail because of corrosive salts. : The captured dust is visually compared against

: Inspectors record the date, location, quantity rating, and size class in a daily report to provide a permanent record of surface cleanliness. You can have “size 3, quantity 1” but

The ISO 8502-3 dust level chart provides a standardized way to assess surface cleanliness, ensuring:

The ISO 8502-3 dust level chart categorizes surfaces into different cleanliness levels based on the amount and size of dust particles present. The chart consists of six cleanliness classes, ranging from "1" (very clean) to "6" (very dirty).

For most high-performance coatings (epoxies, polyurethanes, linings):