90.60 Close of review Sep 3, 2026
ISO
ISO/TC 107 Metallic and other inorganic coatings
International Standard
25.220.50 Enamels
ISO 28721-5:2016 establishes a system for the cataloguing of defects in enamellings for chemical service and vessels. In addition, it describes some types of areas in which defects have been treated and which can easily be confounded with enamelling defects. It serves for a consistent language use concerning the designation and characterization of enamelling defects.
ISO 28721-5:2016 is limited to detectable defects and does not purport to fully take into consideration all occurring types of defects. It does not evaluate enamelling defects; the classification carried out is based on experience and corresponds, as far as possible, to ISO 28721-1.
NOTE Regarding the acceptance of glass lined equipment for use in process engineering, ISO 28721-1 applies.
PUBLISHED
ISO 28721-5:2016
90.60
Close of review
Sep 3, 2026