Iso 85023 Dust Level Chart Pdf Updated [portable] Here
Highest quantity of surface dust (often looks like overall discoloration). iTeh Standards 2. Dust Particle Size Classes
Just visible with normal, unaided eyesight (100 µm to 500 µm) Large particles Clearly visible with unaided eyesight (0.5 mm to 2.5 mm) Class 4 Very large particles Large chunks ranging from 2.5 mm to 5.0 mm Class 5 Flakes / Oversized Extensively large particles larger than 5.0 mm Step-by-Step Field Test Procedure
No dust present (Background contrast equal to reference). Class 1: Very low dust (Slightly detectable). Class 2: Low dust (Clearly visible but small amount). Class 3: Moderate dust (Moderate amount). Class 4: High dust (Large amount). Class 5: Very high dust (Extremely large amount). Particle Size Assessment
Dust particles on blast-cleaned steel can drastically reduce coating adhesion. This leads to blistering, peeling, and localized corrosion. The ISO 8502-3 pressure-sensitive tape method provides a standardized, objective framework to measure both the quantity and size of these dust particles. The ISO 8502-3 Tape Test Method
ISO 8502-3 describes a method for assessing the quantity and size of dust particles on blast-cleaned steel surfaces. The procedure uses a specific type of pressure-sensitive adhesive tape to lift dust from the surface. This tape is then applied to a white or black display board to be evaluated visually against a comparator chart. The ISO 8502-3 Dust Level Chart (Pictorial Rating) iso 85023 dust level chart pdf updated
The chart provides pictorial representations of dust contamination ranging from :
Low density. Particles are visible to the naked eye but cover a minimal percentage of the surface area.
ISO 8502-3:2017, Table 1
High dust level; dense cluster of particles covering a significant portion of the tape. Highest quantity of surface dust (often looks like
As of this writing, the most current and active version of the standard remains . This edition was a technical revision that replaced the original ISO 8502-3:1992.
If you’d like, I can:
: Fine particles visible under magnification but difficult to see with the naked eye.
The chart defines five classes (grades) for the . In practice, a common project specification requires the dust contamination level not to exceed Grade 2 or 3. Class 1: Very low dust (Slightly detectable)
Digitally mastered representations of Quantity Ratings 1 through 5.
The ISO 8502-3 dust assessment comprises two distinct components: and dust quantity . Both must be evaluated and reported to fully characterize the dust contamination level of a prepared surface.
Acceptable for basic atmospheric coatings, but risky for high-performance systems.
Inspectors must also classify the physical size of the dust particles using an illuminated hand lens with 10x magnification. Description Particle Size Dimension Particles not visible Under 50 µm in diameter Class 1 Small particles Visible only under 10x magnification (50 µm to 100 µm) Class 2 Medium particles
Part of a broader series focused on surface cleanliness, ISO 8502-3 uses a to qualitatively assess loose particulate matter. It functions as a rapid "pass/fail" mechanism or a permanent record of surface quality prior to industrial paint application. The evaluation relies on two primary data streams: