# ISO 4377:1990 — Withdrawn and superseded ISO standards

For ISO 4377:1990, item title is Liquid flow measurement in open channels — Flat-V weirs; status code is 9599; successor is ISO 4377:2002; withdrawn / published date is 1990-02-22, recorded from its source on 2026-08-05.

- **Identifier:** ISO 4377:1990 _(verified: appears in the quote below)_
- **Item title:** Liquid flow measurement in open channels — Flat-V weirs _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 4377:2002
- **Withdrawn / published date:** 1990-02-22 _(verified: appears in the quote below)_

## What the source says

> 10254,IS,,ISO 4377:1990,Liquid flow measurement in open channels — Flat-V weirs,Mesure de débit des liquides dans les canaux découverts — Déversoirs en V ouvert,1990-02-22,2,['17.120.20'],ISO/TC 113/SC 2,9599,[10253],[33496],"['en','fr']",18,"<p>Deals with the measurement of flow in rivers and artificial channels using flat-V weirs under steady or slowly varying flow conditions. The standard flat-V weir is a control structure, the crest of which takes the form of a shallow 'V' when viewed in the direction of flow.</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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).