# ISO 23251:2006 — Withdrawn and superseded ISO standards

For ISO 23251:2006, item title is Petroleum, petrochemical and natural gas industries — Pressure-relieving and depressuring systems; status code is 9599; successor is ISO/DIS 23251 | ISO 23251:2019; withdrawn / published date is 2006-08-14, recorded from its source on 2026-08-05.

- **Identifier:** ISO 23251:2006 _(verified: appears in the quote below)_
- **Item title:** Petroleum, petrochemical and natural gas industries — Pressure-relieving and depressuring systems _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO/DIS 23251 | ISO 23251:2019
- **Withdrawn / published date:** 2006-08-14 _(verified: appears in the quote below)_

## What the source says

> 41414,IS,,ISO 23251:2006,"Petroleum, petrochemical and natural gas industries — Pressure-relieving and depressuring systems","Industries du pétrole, de la pétrochimie et du gaz naturel — Systèmes de dépressurisation et de protection contre les surpressions",2006-08-14,1,['75.180.20'],ISO/TC 67/SC 6,9599,,"[55619,75144]","['en','fr']",192,"<p>ISO 23251:2006 is applicable to pressure-relieving and vapour-depressuring systems. Although intended for use primarily in oil refineries, it is also applicable to petrochemical facilities, gas plants, liquefied natural gas (LNG) facilities and oil and gas production facilities. The information provided is designed to aid in the selection of the system t

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).