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Quality Requirements Edition 5.0 European Enamel Association

7.18.3 Quality requirements

A. Steel base
Certificate (3.1 according to EN 10204) to be provided by steel manufacturer, stating:
Test method Requirement Remarks Frequency
steel analysis according to norm suitable for double-sided enamelling per melt
4.16 /4.43 > = 120 does not apply for steel types DC06EK per coil
hydrogen permeability and DC06ED
or 4.22/4.43 fish scale test no fish scales allowed per coil
4.27 pickling speed if required in consultation with the steel manufacturer per coil
and the enameller

B. Enamel frits

The enameller has to use checked enamel frits for this object.

The guarantee should be given by the frit manufacturer in a certificate

The requirements and the test recipes are determined in consultation between enameller and frit manufacturer.
The results are given in a certificate according to EN 10204 3.1

Test method Requirement Remarks Frequency
4.6 resistance against boiling if required by the enameller per 10,000 kg

2
2
water and/or vapour air-gas: 20 g/m /48h; gas-gas: 6 g/m /48h
4.35 resistance against per 5,000 kg

2
2
boiling sulphuric acid air-gas: 10 g/m /48h; gas-gas: 2 g/m /48h
4.40 resistance against if required in consultation with the frit manufacturer and the per 10,000 kg

thermal shock enameller; 5 x 350 degrees C, according EN 14866 annex A

4.44 fusion flow if required in consultation with the frit manufacturer and the per 10,000 kg
enameller
4.45 coefficient of expansion if required in consultation with the frit manufacturer and the per 10,000 kg
enameller

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