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ISO 28721-2:2025

Vitreous and porcelain enamels — Glass-lined apparatus for process plants — Part 2: Designation and specification of resistance to chemical attack and thermal shock

Standard Details

This document specifies requirements for the resistance of chemical enamels to chemical attack and thermal shock, as well as their designation, for ordering purposes.

It is applicable to enamels used in glass-lined apparatus, piping and other components, primarily used in process equipment in chemical plants, which are applied on to low-alloy carbon steels substrates.

NOTE            The main criteria for assessing enamel quality are its resistance to chemical attack and thermal shock, and the structure of the cover coat enamel.

General Information

Status : Published
Standard Type: Main
Document No: ISO 28721-2:2025
Document Year: 2025
Pages: 3
Edition: 3
  • Section Volume:
  • ISO/TC 107. Metallic and other inorganic coatings

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ISO 28721-2:2025
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