Searching for the is the first step to compliance. Visit your national standards body or a reputable NACE training center today to download the official version.
┌──────────────┬─────────────────┬─────────────────┐ │ ISO 8502-3 │ Max particle (µm)│ Coating action │ │ Dust Class │ │ │ ├──────────────┼─────────────────┼─────────────────┤ │ 1 (Best) │ < 50 │ Proceed │ │ 2 (Good) │ 50–100 │ Proceed (unless │ │ │ │ immersed) │ │ 3 (Fair) │ 100–200 │ Clean surface │ │ 4 (Poor) │ 200–300 │ Re-blast │ │ 5 (Reject) │ > 300 │ Re-blast │ └──────────────┴─────────────────┴─────────────────┘ iso 85023 dust level chart pdf updated
The standard utilizes a qualitative "pressure-sensitive tape method". A strip of specialized adhesive tape—typically 200 mm long—is pressed onto the prepared steel surface. Pressure is applied either manually with a thumb or, for greater accuracy in disputes, using a calibrated spring-loaded roller to ensure consistent force. Once removed, the tape is mounted on a contrast-colored board (usually black or white) for visual evaluation. Understanding the ISO 8502-3 Rating Chart The evaluation is split into two distinct categories: Particle Size INTERNATIONAL STANDARD ISO 8502-3 Searching for the is the first step to compliance