# ISO 6771:1987 — Withdrawn and superseded ISO standards For ISO 6771:1987, item title is Aerospace — Fluid systems and components — Pressure and temperature classifications; status code is 9599; successor is ISO 6771:2007 | ISO/CD 6771; withdrawn / published date is 1987-09-03, recorded from its source on 2026-08-05. - **Identifier:** ISO 6771:1987 _(verified: appears in the quote below)_ - **Item title:** Aerospace — Fluid systems and components — Pressure and temperature classifications _(verified: appears in the quote below)_ - **Status code:** 9599 _(verified: appears in the quote below)_ - **Successor:** ISO 6771:2007 | ISO/CD 6771 - **Withdrawn / published date:** 1987-09-03 _(verified: appears in the quote below)_ ## What the source says > 13266,IS,,ISO 6771:1987,Aerospace — Fluid systems and components — Pressure and temperature classifications,Aéronautique et espace — Systèmes de fluides et éléments constitutifs — Classification des températures et pressions,1987-09-03,2,['49.080'],ISO/TC 20/SC 10,9599,[13265],"[43220,36800]","['en','fr']",1,

Establishes the temperature types and pressure classes that are commonly used. System operating temperature ranges shall be classified as given in table 1. Nominal pressures shall be classified as given in table 2. The operating pressures listed are selected from ISO 2944 as far as practical.

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 Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).