# ISO 2505-1:1994 — Withdrawn and superseded ISO standards For ISO 2505-1:1994, item title is Thermoplastics pipes — Longitudinal reversion — Part 1: Determination methods; status code is 9599; successor is ISO 2505:2005; withdrawn / published date is 1994-12-01, recorded from its source on 2026-08-05. - **Identifier:** ISO 2505-1:1994 _(verified: appears in the quote below)_ - **Item title:** Thermoplastics pipes — Longitudinal reversion — Part 1: Determination methods _(verified: appears in the quote below)_ - **Status code:** 9599 _(verified: appears in the quote below)_ - **Successor:** ISO 2505:2005 - **Withdrawn / published date:** 1994-12-01 _(verified: appears in the quote below)_ ## What the source says > 7435,IS,,ISO 2505-1:1994,Thermoplastics pipes — Longitudinal reversion — Part 1: Determination methods,Tubes en matières thermoplastiques — Retrait longitudinal à chaud — Partie 1: Méthodes de détermination,1994-12-01,1,['23.040.20'],ISO/TC 138/SC 5,9599,"[7437,7434,8831]",[33601],"['en','fr']",3,"

Specifies two methods for determining the longitudinal reversion of thermoplstics pipes, to be carried out in liquid or in air. Applies to all thermoplastics pipes with smooth internal and external walls of constant cross-section. Does not apply to non-smooth structured-wall thermoplastics pipes.

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 Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).