标准摘要
[中文适用范围]： 本文件规定了一种确定热塑性塑料管纵向复原的方法，可在液体或空气中进行。如有争议，以加热液体为参考。本文件适用于所有具有恒定横截面的光滑内壁和外壁的热塑性塑料管。它不适用于非光滑结构壁热塑性塑料管。附件 A 中给出了适合管道材料的参数以及与管道材料相关的最大复原水平建议。该方法适用于壁厚 ≤ 16 毫米的管道。 [外文原描述]： 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.
英文名称Thermoplastics pipes — Longitudinal reversion — Test method and parameters