Page 40 - 20250602 EEA QM Edition 6.0

Quality Requirements Edition 6.0 European Enamel Association

7.8. QUALITY REQUIREMENTS FOR PORCELAIN AND VITREOUS ENAMELLED WASHING MACHINES, DRUMS AND SPINNER BASKETS, WASH KETTLES, DISH-
WASHERS AND DRYERS

7.8.1 Application area

These requirements are applicable for parts of washing boilers, drums and spinner baskets, enamelled parts such as:
- washing machines: washing drums, spinner baskets, cover-tops and outside parts
- washing kettles: bottom plates and lids
- dish-washers: rinsing-areas and outside panels
- dryers: outside panels

7.8.2 Test methods

Item Name Applicable standards
4.2 measurement of the thickness of the base substrate metal EN ISO 16809
4.3 measurement of the thickness of the enamel coating EN ISO 2178, EN ISO 2360, EN ISO 1463
4.4 determination of the resistance to chemical corrosion by citric acid or EN ISO 28706-1/9
other acids at room temperature
4.6 determination of the resistance to chemical corrosion by boiling water and/or water EN ISO 28706-2/14, EN ISO 28706-2/6
vapour
4.7 determination of the resistance to chemical corrosion by boiling detergent solution EN ISO 28706-3/10, EN ISO 28706-2/6
4.9 determination of the resistance to impact EN ISO 4532
4.10 determination of the adherence of the enamel to the substrate EN 10209 Annex C
4.11 determination of the resistance to thermal shock EN ISO 2747
4.19 determination of colour difference EN ISO 18314, EN ISO/CIE 11664
4.28 determination of the quality of steel for enamelling EN 10209 for cold rolled steel and see 4.28 recommendations for hot rolled
steels, HSLA steels and steel forgings for pressure applications

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