标准编号：ISO 2505:2005
中文名称：热塑管 纵向回缩 试验方法和参数
英文名称：Thermoplastics pipes — Longitudinal reversion — Test method and parameters
发布日期：2005-05
标准范围
This International Standard 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 International Standard 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.NOTE Measurement of longitudinal reversion is not considered relevant for pipe wall thickness greater than 16 mm.
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