用于非压力应用的热塑性塑料管道系统 - 耐高温循环的测试方法

[中文适用范围]： 本文件规定了一种测试方法，用于确定建筑物内或埋在建筑结构内非压力应用的热塑性塑料管道系统的高温循环耐受性。 本文件适用于标称外径不超过 200 毫米（含 200 毫米）的组件的管道系统。 尽管仅限于标称外径不超过 200 毫米（含 200 毫米），但测试结果可外推至同一范围内具有更大标称外径的产品。 [外文原描述]： This document specifies a test method for determining the resistance to elevated temperature cycling of thermoplastics piping systems for non‑pressure applications, inside buildings or buried in the ground within the building structure. This document is applicable to piping systems with components of nominal outside diameters up to and including 200 mm. Although limited to nominal outside diameters up to and including 200 mm, the test results may be extrapolated to products of larger nominal outside diameters from the same range.