ISO 2505:2023

Thermoplastics pipes — Longitudinal reversion — Test method and parameters ISO 2505:2023

Publication date:   Oct 13, 2023

General information

60.60 Standard published   Oct 13, 2023


ISO/TC 138/SC 5 General properties of pipes, fittings and valves of plastic materials and their accessories -- Test methods and basic specifications

International Standard

23.040.20   Plastics pipes



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This document specifies a method for determining the longitudinal reversion of thermoplastics pipes, to be carried out in either a liquid or in air. In case of dispute, heated liquid is used as the reference.
This document is applicable to all thermoplastics pipes with smooth internal and external walls of constant cross‑section. It is not applicable to non‑smooth structured‑wall thermoplastics pipes.
The parameters appropriate to the pipe material and recommendations for the maximum levels of reversion as a function of the pipe material are given in Annex A.
This method is applicable for pipes of wall thickness ≤ 16 mm.

Life cycle


ISO 2505:2005


ISO 2505:2023
60.60 Standard published
Oct 13, 2023