Marta minimized the PDF and opened her field notes. She remembered that turbine. The steel had looked clean, but there had been a faint, shadowy haze in one corner. Under the old rules, it was a Size 2.5—acceptable. Under the new updated chart, with its stricter clustering definition, it was a clear Size 3. Reject.
The chart displays 5 levels of dust density. iso 85023 dust level chart pdf updated
It rates the quantity (density) of the dust using a visual rating scale from 0 to 5. Deciphering the ISO 8502-3 Dust Level Chart Marta minimized the PDF and opened her field notes
Stick the tape onto the assessment board. Use the black background for light/white dust and the white background for dark/metallic dust. Under the old rules, it was a Size 2
Apply a 200 mm (approx. 8 inches) strip of tape to the steel surface.
Very high dust level; dense concentration covering the entire tape area.
Provides a clear, unambiguous benchmark that asset owners, blasting contractors, and paint inspectors agree upon before work begins.