# ISO 3669:2020 — Withdrawn and superseded ISO standards

For ISO 3669:2020, item title is Vacuum technology — Dimensions of knife-edge flanges; status code is 9599; successor is ISO 3669:2026; withdrawn / published date is 2020-02-07, recorded from its source on 2026-08-05.

- **Identifier:** ISO 3669:2020 _(verified: appears in the quote below)_
- **Item title:** Vacuum technology — Dimensions of knife-edge flanges _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 3669:2026
- **Withdrawn / published date:** 2020-02-07 _(verified: appears in the quote below)_

## What the source says

> 79413,IS,,ISO 3669:2020,Vacuum technology — Dimensions of knife-edge flanges,Technique du vide — Dimensions des brides à guillotine,2020-02-07,3,['23.160'],ISO/TC 112,9599,[65135],[87685],['en'],7,<p>This document specifies the dimensions of fixed or rotatable bolted knife-edge flanges used in vacuum systems for pressures ranging from atmospheric to as low as 10<sup>−11</sup> Pa.</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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).