# ISO 28721-4:2010 — Withdrawn and superseded ISO standards

For ISO 28721-4:2010, item title is Vitreous and porcelain enamels — Glass-lined apparatus for process plants — Part 4: Quality requirements for glass-lined flanged steel pipes and flanged steel fittings; status code is 9599; successor is ISO 28721-4:2015; withdrawn / published date is 2010-09-20, recorded from its source on 2026-08-05.

- **Identifier:** ISO 28721-4:2010 _(verified: appears in the quote below)_
- **Item title:** Vitreous and porcelain enamels — Glass-lined apparatus for process plants — Part 4: Quality requirements for glass-lined flanged steel pipes and flanged steel fittings _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 28721-4:2015
- **Withdrawn / published date:** 2010-09-20 _(verified: appears in the quote below)_

## What the source says

> 56670,IS,,ISO 28721-4:2010,Vitreous and porcelain enamels — Glass-lined apparatus for process plants — Part 4: Quality requirements for glass-lined flanged steel pipes and flanged steel fittings,Émaux vitrifiés — Appareils émaillés pour les installations industrielles — Partie 4: Exigences de qualité pour les tubes et raccords à brides en acier émaillé,2010-09-20,1,['25.220.50'],ISO/TC 107,9599,,[66085],"['en','fr']",5,<p>ISO 28721-4:2010 specifies the quality requirements for glass-lined flanged steel pipes and flanged steel fittings used for process plants.</p>

## Source

- https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv

Last verified: 2026-08-05. Review by: 2027-02-01.
Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).