ISO 28721-1:2019 PDF

Scope: This document specifies the quality requirements for apparatus, components, appliances and accessories of glass-lined steel (including semi-crystallized enamel coatings) and glass-lined steel castings used for process plants. It specifies the quality requirements and the tests to be carried out by the manufacturer as well as the actions to be taken to repair defects. It is also applicable to glass-lined pumps, pump components and fittings. It does not apply to glass-lined flanged steel pipes or glass-lined flanged steel fittings. NOTE 1 Provisions for glass-lined flanged steel pipes and glass-lined flanged steel fittings are given in The test methods specified cover checking the enamel, the dimensional accuracy and the performance of apparatus and components. This document is applicable to new apparatus and components as well as used items that have been re- enamelled. It does not contain requirements regarding the chemical or physical properties of vitreous and porcelain enamels. NOTE 2 Examples of test reports are given in Annex A.

ISO 28721-1:2019 Referenced Document

ISO 19496-1 Vitreous and porcelain enamels — Terminology — Part 1: Terms and definitions
ISO 2178 Non-magnetic coatings on magnetic substrates - Measurement of coating thickness - Magnetic method
ISO 2746 Vitreous and porcelain enamels - High voltage test
ISO 28721-2 Vitreous and porcelain enamels - Glass-lined apparatus for process plants - Part 2: Designation and specification of resistance to chemical attack and thermal shock
ISO 28721-3 Vitreous and porcelain enamels - Glass-lined apparatus for process plants - Part 3: Thermal shock resistance
ISO 780 Packaging - Distribution packaging - Graphical symbols for handling and storage of packages

2019 ISO 28721-1:2019 Vitreous and porcelain enamels — Glass-lined apparatus for process plants — Part 1: Quality requirements for apparatus, components, appliances and accessories
2008 ISO 28721-1:2008 Vitreous and porcelain enamels - Glass-lined apparatus for process plants - Part 1: Quality requirements for apparatus, components, appliances and accessories