Page 42 - 20250602 EEA QM Edition 6.0

Quality Requirements Edition 6.0 European Enamel Association

7.9. QUALITY REQUIREMENTS FOR PORCELAIN AND VITREOUS ENAMELLED STEEL SANITARY WARE, BATHTUBS AND SHOWER BASINS

7.9.1 Application area

These requirements are is applicable for bathtubs, shower basins and enamelled steel sanitary ware, such as:

- piss-pots and slop-pails

- wash-bowls and rinsing-tubs for bathrooms
- humidifiers and cisterns

7.9.2 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
4.5 determination of the resistance to chemical corrosion by boiling citric acids EN ISO 28706-2/11, EN ISO 28706-2/6
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
4.19 determination of colour difference EN ISO 18314, EN ISO/CIE 11664
4.26 determination of abrasion resistance ASTM C501, EN ISO 6370-1 and EN ISO 6370-2

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