ISO 28721-2:2025Published

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

Émaux vitrifiés — Appareils émaillés pour les installations industrielles — Partie 2: Désignation et spécifications de la résistance à l'attaque chimique et au choc thermique

Abstract / scope

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.

Life cycle

Replaces

ISO 28721-2:2015WithdrawnVitreous and porcelain enamels — Glass-lined apparatus for process plants — Part 2: Designation and specification of resistance to chemical attack and thermal shockInternational Standard · Published 30 Nov 2015 · ISO/TC 107