DIN EN 14866 E : 2006

Foreword<br>1 Scope<br>2 Normative references<br>3 Terms and definitions<br>4 Steel substrates<br>&nbsp;&nbsp;&nbsp;4.1 Delivery<br>&nbsp;&nbsp;&nbsp;4.2 Analysis<br>&nbsp;&nbsp;&nbsp;4.3 Hydrogen permeability<br>&nbsp;&nbsp;&nbsp;4.4 Fish scale test<br>&nbsp;&nbsp;&nbsp;4.5 Pickling speed<br>5 Enamel frit(s)<br>&nbsp;&nbsp;&nbsp;5.1 Delivery<br>&nbsp;&nbsp;&nbsp;5.2 Coefficient of expansion<br>&nbsp;&nbsp;&nbsp;5.3 Fusion flow<br>&nbsp;&nbsp;&nbsp;5.4 Boiling water vapour resistance<br>&nbsp;&nbsp;&nbsp;5.5 Acid resistance<br>&nbsp;&nbsp;&nbsp;5.6 Thermal shock resistance<br>&nbsp;&nbsp;&nbsp;5.7 Adherence<br>6 Characteristics of the enamel coating<br>&nbsp;&nbsp;&nbsp;6.1 Adherence<br>&nbsp;&nbsp;&nbsp;6.2 Thickness<br>&nbsp;&nbsp;&nbsp;6.3 Thermal shock resistance<br>&nbsp;&nbsp;&nbsp;6.4 Fundamental defects<br>&nbsp;&nbsp;&nbsp;6.5 Open defects<br>&nbsp;&nbsp;&nbsp;6.6 Edge covering of gas-gas heaters<br>&nbsp;&nbsp;&nbsp;6.7 Boiling sulphuric acid resistance<br>&nbsp;&nbsp;&nbsp;6.8 Rework<br>7 Characteristics after packing<br>&nbsp;&nbsp;&nbsp;7.1 Packing pressure<br>&nbsp;&nbsp;&nbsp;7.2 Visual examination<br>&nbsp;&nbsp;&nbsp;7.3 Edge covering of gas-gas heaters<br>8 Documentation<br>Annex A (normative) Method for determining thermal shock <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;resistance of vitreous or porcelain enamel<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;coatings<br>National Annex NA (informative) Bibliography

Defines the minimum requirements and the functional characteristics of enamel coatings applied by any enamel process, such as: wet dipping, wet flow-coating, wet spraying, wet electrostatic spraying, wet electro deposition or dry powder electrostatic spraying, to profiled steel heat exchanger panels in regenerative heat exchangers, before and after packing in baskets.