NF EN ISO 2505
Thermoplastics pipes - Longitudinal reversion - Test method and parameters
ISO 2505:2005 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. ISO 2505:2005 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.
ISO 2505:2005 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. ISO 2505:2005 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.
Le présent document décrit deux méthodes d'essai pour déterminer le retrait longitudinal à chaud des tubes en matières thermoplastiques cylindriques à surfaces lisses.
<p class="MsoBodyText"><span lang="EN-GB">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.</span></p> <p class="MsoBodyText"><span lang="EN-GB">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.</span></p> <p class="MsoBodyText"><span lang="EN-GB">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.</span></p> <p class="MsoBodyText"><span lang="EN-GB">This method is applicable for pipes of wall thickness ≤ 16 mm.</span></p>
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