The ISO 8502-3:2017 standard remains the current global benchmark for assessing dust on steel surfaces before painting. While it was last confirmed in 2022, the methodology and pictorial references established in the 2017 update continue to serve as the industry standard for quality control in 2024 and beyond.
The assessment is split into two primary qualitative ratings: Quantity and Size. 1. Dust Quantity Ratings (1–5) iso 85023 dust level chart pdf updated
If you need a free quick-reference PDF for field use, many NACE (now AMPP) and SSPC guides offer condensed versions. Search for: "ISO 8502-3:2017 free reference card" or check your coating manufacturer’s technical data sheet (TDS) appendix. The ISO 8502-3:2017 standard remains the current global