# ISO 20145:2019 — Withdrawn and superseded ISO standards

For ISO 20145:2019, item title is Pneumatic fluid power — Test methods for measuring acoustic emission pressure levels of exhaust silencers; status code is 9599; successor is ISO/DIS 20145 | ISO 20145:2026; withdrawn / published date is 2019-10-21, recorded from its source on 2026-08-05.

- **Identifier:** ISO 20145:2019 _(verified: appears in the quote below)_
- **Item title:** Pneumatic fluid power — Test methods for measuring acoustic emission pressure levels of exhaust silencers _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO/DIS 20145 | ISO 20145:2026
- **Withdrawn / published date:** 2019-10-21 _(verified: appears in the quote below)_

## What the source says

> 67149,IS,,ISO 20145:2019,Pneumatic fluid power — Test methods for measuring acoustic emission pressure levels of exhaust silencers,Transmissions pneumatiques — Méthodes d'essai de mesure du niveau de pression d'émission acoustique des silencieux d'échappement,2019-10-21,1,['23.100.99'],ISO/TC 131/SC 5,9599,,"[84961,88080]","['en','fr']",21,"<p>This document specifies two methods of measuring the level of acoustic pressure at the outlet of an exhaust silencer:</p><p>— the first method, called 'steady-state mode', is intended to evaluate the noise level under steady state flow, i.e. constant upstream pressure (steady-state test according to ISO 6358‑1); and</p><p>— the second

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).