# ISO 2556:1974 — Withdrawn and superseded ISO standards

For ISO 2556:1974, item title is Plastics — Determination of the gas transmission rate of films and thin sheets under atmospheric pressure — Manometric method; status code is 9599; successor is ISO/WD 2556; withdrawn / published date is 1974-06-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 2556:1974 _(verified: appears in the quote below)_
- **Item title:** Plastics — Determination of the gas transmission rate of films and thin sheets under atmospheric pressure — Manometric method _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO/WD 2556
- **Withdrawn / published date:** 1974-06-01 _(verified: appears in the quote below)_

## What the source says

> 7506,IS,,ISO 2556:1974,Plastics — Determination of the gas transmission rate of films and thin sheets under atmospheric pressure — Manometric method,"Matières plastiques — Détermination du coefficient de transmission d'un gaz par les feuilles et plaques minces, sous pression atmosphérique — Méthode manométrique",1974-06-01,1,['83.140.10'],ISO/TC 61/SC 5,9599,[7505],[26823],"['en','fr']",6,"<p>Specification of the methodand of two types of suitable test apparatus. The plastic test specimen separates two chambers, the one contains the test gas at atmospheric pressure, the other of known initial volume has the air pumped out until the pressure is practically zero. The quantity of gas which pass

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).