BS EN ISO 28721-1:2019 Vitreous and porcelain enamels. Glass-lined apparatus for process plants Quality requirements for apparatus, components, appliances and accessories

Dimensional tolerances
Thickness
Glass ceramics
Packaging
Surface properties
Cast steels
Defects
Ceramic coatings
Performance testing
Visual inspection (testing)
High-voltage tests
Reports
Quality control
Non-metallic coatings
Steels
Chemical technology equipment
Vitreous enamel
Accuracy
Finishes
Chemical plants

Link: BS EN ISO 28721-1:2019 Vitreous and porcelain enamels. Glass-lined apparatus for process plants Quality requirements for apparatus, components, appliances and accessories
Source: BSI Standards