Iso 85023 Dust Level Chart Pdf Updated -

The evaluation relies on a simple, field-proven technical procedure:

An earlier document, but useful for understanding the foundational process.

The new chart emphasizes that even if quantity is Class 2, if any particle exceeds 100 µm, the overall rating drops to Class 3.

The updated standard evaluates dust properties via distinct metrics: 1. Dust Particle Size Classes iso 85023 dust level chart pdf updated

A very small quantity of fine dust particles distributed evenly.

A compliant ISO 8502-3 report should include:

The current version of ISO 8502-3 is , confirmed on June 30, 2022. The standard is available for purchase in PDF format from multiple authorized distributors: The evaluation relies on a simple, field-proven technical

One-page summary of purpose, scope, and key changes in the updated dust level chart and measurement procedure.

ISO 8502-3 is a critical part of the ISO 8502 series, which focuses on tests for assessing surface cleanliness. Specifically, Part 3 describes the "pressure-sensitive tape method" for evaluating residual dust on steel surfaces that have been cleaned and prepared for painting. Dust contamination is a major threat to coating integrity—it acts as a weak boundary layer, preventing proper adhesion and leading to premature coating failure, such as flaking or blistering. By providing a standardized method for sampling and rating dust, ISO 8502-3 allows inspectors and contractors to make objective, pass/fail decisions about surface readiness, ensuring the performance of subsequent paint systems.

Typically a clear tape with a specific width (usually 25 mm) and adhesion strength. Dust Particle Size Classes A very small quantity

Clear tape. No dust particles visible under 10x magnification.

Retroactive. The word felt like a hammer.

ISO 8502-3 is a globally recognized standard that defines a method for assessing the quantity and size of dust particles remaining on blast-cleaned steel surfaces prior to painting.

The standard uses two primary metrics to grade surface cleanliness: (pictorial) and Size Class (descriptive). 1. Dust Particle Size Classes

Accurate metric indicators for Size Classes 1 through 5.