Page 49 - QRedition5.0 062021

Quality Requirements Edition 5.0 European Enamel Association

7.12. QUALITY REQUIREMENTS FOR PORCELAIN AND VITREOUS ENAMELLED HOT WATER TANKS (BOILERS)

7.12.1 Application area

This norm is applicable for enamelled steel hot water stock tanks (boilers) in which water is heated that is also meant for consumption, with an operating principle according
to CEE publication 11, part II, section E (2nd edition, November 1996), and that may be equipped with a magnesium anode (that can or not be foreseen with a magnesium
anode)
GENERAL: THE PRODUCTS MEANT FROM THIS GROUP NEED TO MEET THE REQUIREMENTS AS DESCRIBED IN THE DIN 4753

7.12.2 Test methods

Item Name Comparable standards
steel quality EN 10025, EN 10204, EN 10209, DIN 50049, DIN 4753
general requirements – construction DIN 4753
general requirements – enamelling DIN 4753
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 other acids at room temperature EN ISO 28706-1/9
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
4.8 vapour UBA-guideline + national laws + DIN 4753-3
Specification and determination of the release of toxic elements
4.9 determination of the impact resistance ISO 4532
4.10 determination of the adherence of the enamel to the substrate EN 10209 Annex C
4.30 identification of defects for hot water tanks (non-destructive - visual only) DIN 4753-3; BS 3831 Appendix A; IVE Atlas of Defects
4.31 determination and measurement of protective current requirements for hot water DIN 4753-3
tanks
4.32 determination and control of Lead and Cadmium release for hot water tanks UBA-guideline + national laws (see also clause 4.8) + DIN 4753-3
4.40 determination of thermal shock resistance of enamelled articles into water EEA Specification 8.6.4

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