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DIN EN ISO 8501-4:2021
Preparation of steel substrates before application of paints and related products - Visual assessment of surface cleanliness - Part 4: Initial surface conditions, preparation grades and flash rust grades in connection with water jetting (ISO 8501-4:2020); German version EN ISO 8501-4:2020
This part of DIN EN ISO 8501 specifies a series of preparation grades of steel surfaces after removal of water-soluble contaminants, rust and coatings as well as other foreign matter by high-pressure water jetting.
Deutsches Institut für Normung [din]