# ISO/TS 16976-4:2012 — Withdrawn and superseded ISO standards For ISO/TS 16976-4:2012, item title is Respiratory protective devices — Human factors — Part 4: Work of breathing and breathing resistance: Physiologically based limits; status code is 9599; successor is ISO/TS 16976-4:2019; withdrawn / published date is 2012-06-08, recorded from its source on 2026-08-05. - **Identifier:** ISO/TS 16976-4:2012 _(verified: appears in the quote below)_ - **Item title:** Respiratory protective devices — Human factors — Part 4: Work of breathing and breathing resistance: Physiologically based limits _(verified: appears in the quote below)_ - **Status code:** 9599 _(verified: appears in the quote below)_ - **Successor:** ISO/TS 16976-4:2019 - **Withdrawn / published date:** 2012-06-08 _(verified: appears in the quote below)_ ## What the source says > 53361,TS,,ISO/TS 16976-4:2012,Respiratory protective devices — Human factors — Part 4: Work of breathing and breathing resistance: Physiologically based limits,Appareils de protection respiratoire — Facteurs humains — Partie 4: Travail de respiration et de résistance à la respiration: limites physiologiques,2012-06-08,1,['13.340.30'],ISO/TC 94/SC 15,9599,,[73210],"['en','fr']",16,"
ISO/TS 16976-4:2012 describes how to calculate the work performed by a person's respiratory muscles with and without the external respiratory impediments that are imposed by RPD of all kinds, except diving equipment. ISO/TS 16976-4:2012 describes how much additional impediment people can tolerate and contains va ## 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 Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).