# ISO 21809-4:2009 — Withdrawn and superseded ISO standards

For ISO 21809-4:2009, item title is Petroleum and natural gas industries — External coatings for buried or submerged pipelines used in pipeline transportation systems — Part 4: Polyethylene coatings (2-layer PE); status code is 9599; successor is ISO 21809-4:2026; withdrawn / published date is 2009-11-05, recorded from its source on 2026-08-05.

- **Identifier:** ISO 21809-4:2009 _(verified: appears in the quote below)_
- **Item title:** Petroleum and natural gas industries — External coatings for buried or submerged pipelines used in pipeline transportation systems — Part 4: Polyethylene coatings (2-layer PE) _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 21809-4:2026
- **Withdrawn / published date:** 2009-11-05 _(verified: appears in the quote below)_

## What the source says

> 39074,IS,,ISO 21809-4:2009,Petroleum and natural gas industries — External coatings for buried or submerged pipelines used in pipeline transportation systems — Part 4: Polyethylene coatings (2-layer PE),Industries du pétrole et du gaz naturel — Revêtements externes des conduites enterrées ou immergées utilisées dans les systèmes de transport par conduites — Partie 4: Revêtements à base de polyéthylène (PE bicouche),2009-11-05,1,['75.200'],ISO/TC 67/SC 2,9599,,[84937],['en'],34,"<p>ISO 21809-4:2009 specifies the requirements for qualification, application, inspection, testing, handling and storage of materials for plant application of two-layer polyethylene coatings (2-layer PE) applied exter

## 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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).