# ISO 15500-12:2001 — Withdrawn and superseded ISO standards For ISO 15500-12:2001, item title is Road vehicles — Compressed natural gas (CNG) fuel system components — Part 12: Pressure relief valve (PRV); status code is 9599; successor is ISO 15500-12:2015; withdrawn / published date is 2001-01-18, recorded from its source on 2026-08-05. - **Identifier:** ISO 15500-12:2001 _(verified: appears in the quote below)_ - **Item title:** Road vehicles — Compressed natural gas (CNG) fuel system components — Part 12: Pressure relief valve (PRV) _(verified: appears in the quote below)_ - **Status code:** 9599 _(verified: appears in the quote below)_ - **Successor:** ISO 15500-12:2015 - **Withdrawn / published date:** 2001-01-18 _(verified: appears in the quote below)_ ## What the source says > 30460,IS,,ISO 15500-12:2001,Road vehicles — Compressed natural gas (CNG) fuel system components — Part 12: Pressure relief valve (PRV),Véhicules routiers — Composants des systèmes de combustible gaz naturel comprimé (GNC) — Partie 12: Soupapes de sécurité à la pression,2001-01-18,1,['43.060.40'],ISO/TC 22/SC 41,9599,,[60286],['en'],4, ## 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 Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).