EN 14866:2005

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

This European Standard specifies 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.NOTEFor very severe service conditions, or to obtain extended operation life, more stringent limits may be agreed between customer and supplier.