Page 46 - 20250602 EEA QM Edition 6.0

Quality Requirements Edition 6.0 European Enamel Association

7.11. QUALITY REQUIREMENTS FOR PORCELAIN AND VITREOUS ENAMELLED PIECES OF APPARATUS FOR ROOM/ SPACE-HEATING
AND GEYSERS (WATER-HEATERS)

For power plant heat exchangers see 7.18 and 7.19

7.11.1 Application area

These requirements are applicable for enamelled pieces, such as:

- steel panels for room heating
- steel combustion-chambers
- wall-grids which are applied in pieces of apparatus for space-heating and geysers, which can be fired with gas, coal, as well as oil (petroleum).
- chimney tubes and pipes

7.11.2 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

4.9 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
4.13 determination, detection and location of defects (non-destructive) EN ISO 8289
4.21 determination of resistance to heat EN ISO 4530
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

4.40 determination of thermal shock resistance of enamelled articles into water EEA Specification 8.6.4

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