# ISO 4402:1991 — Withdrawn and superseded ISO standards

For ISO 4402:1991, item title is Hydraulic fluid power — Calibration of automatic-count instruments for particles suspended in liquids — Method using classified AC Fine Test Dust contaminant; status code is 9599; successor is ISO 11171:1999; withdrawn / published date is 1991-10-17, recorded from its source on 2026-08-05.

- **Identifier:** ISO 4402:1991 _(verified: appears in the quote below)_
- **Item title:** Hydraulic fluid power — Calibration of automatic-count instruments for particles suspended in liquids — Method using classified AC Fine Test Dust contaminant _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 11171:1999
- **Withdrawn / published date:** 1991-10-17 _(verified: appears in the quote below)_

## What the source says

> 10308,IS,,ISO 4402:1991,Hydraulic fluid power — Calibration of automatic-count instruments for particles suspended in liquids — Method using classified AC Fine Test Dust contaminant,Transmissions hydrauliques — Étalonnage des compteurs automatiques de particules en suspension dans les liquides — Méthode utilisant une fine poussière d'essai (ACFTD),1991-10-17,2,['23.100.60'],ISO/TC 131/SC 6,9599,,[1919],"['en','fr']",6,

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).