1.1 本试验方法描述了评价按照规范生产的聚丙烯(PP)管道长期抗氯化水氧化性的一般要求 F2389 通过暴露于热的氯化水用于热水和冷水分配系统。该测试方法概述了加压流通测试系统的要求、典型测试压力、测试流体特性、故障类型和数据分析。 附注1: 其它已知的消毒系统(二氧化氯、臭氧和氯胺)也用于保护饮用水。游离氯是当今最常用的消毒剂。PPI研究项目检查了游离氯和氯胺在相同4.0 ppm浓度和相同测试温度下对PEX管道的相对侵蚀性。测试结果显示，在测试条件下，与使用游离氯测试相比，使用氯胺测试的管道故障时间长约40%。基于这些结果，数据表明氯胺对PEX管道的侵蚀性小于游离氯。本注释提供了有关使用测试方法在PEX管路上测试不同消毒系统的信息 F2023 PPI研究项目不包括聚丙烯管道的测试。 附注2: 本试验方法基于试验方法 F2023 并且该方法的结果可用于与先前根据测试方法测试的PP管道材料的结果直接比较 F2023 . 1.2 本试验方法适用于用于输送含有游离-消毒用氯。本测试方法中规定的测试流体的氧化电位超过了美国饮用水系统中通常发现的氧化电位。 1.3 以英寸-磅单位表示的值应被视为标准值。括号中给出的数值是对SI单位的数学转换，仅供参考，不被视为标准 1.4 以下注意事项仅适用于试验方法部分，章节 12 ，本说明书的。 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践并确定法规限制的适用性。1.5 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ======意义和用途====== 5.1 根据本试验方法得出的环境或氧化失效时间数据，根据第节进行分析 13 ，适用于外推到典型的最终使用温度和环向应力。外推值提供了测试PP管道或系统在与获得测试数据的条件相当的条件下对热氯化水氧化作用的抵抗力的相对指示。材料或管道产品在实际安装和使用条件下的性能取决于许多因素，包括安装方法、使用模式、水质、局部应力的性质和大小，以及实际运行中的冷热水分配系统的其他变量。因此，外推值不构成具有给定外推失效时间值的PP管道或系统在实际使用条件下将在该时间段内执行的表示。

1.1 This test method describes the general requirements for evaluating the long-term, chlorinated water, oxidative resistance of polypropylene (PP) piping produced in accordance with Specification F2389 used in hot-and-cold water distribution systems by exposure to hot, chlorinated water. This test method outlines the requirements of a pressurized flow-through test system, typical test pressures, test-fluid characteristics, failure type, and data analysis. Note 1: Other known disinfecting systems (chlorine dioxide, ozone, and chloramines) are also used for protection of potable water. Free-chlorine is the most common disinfectant in use today. A PPI research project examined the relative aggressiveness of free chlorine and chloramines on PEX pipes, both at the same 4.0 ppm concentration and the same test temperatures. The results of the testing showed pipe failure times approximately 40 % longer when tested with chloramines compared to testing with free chlorine, at the tested conditions. Based on these results, the data suggests that chloramines are less aggressive than free chlorine to PEX pipes. This note is provided for information regarding testing different disinfecting systems on PEX tubing using Test Method F2023 . The PPI research project did not include testing of polypropylene piping. Note 2: This test method is based on Test Method F2023 and results from this method can be used for direct comparison with previous results on PP piping materials tested in accordance with Test Method F2023 . 1.2 This test method is applicable to PP piping systems used for transport of potable water containing free-chlorine for disinfecting purposes. The oxidizing potential of the test-fluid specified in this test method exceeds that typically found in potable water systems across the United States. 1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard 1.4 The following precautionary caveat pertains only to the test method portion, Section 12 , of this specification. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 Environment or oxidative time-to-fail data derived from this test method, analyzed in accordance with Section 13 , are suitable for extrapolation to typical end-use temperatures and hoop stresses. The extrapolated value(s) provides a relative indication of the resistance of the tested PP piping or system to the oxidative effects of hot, chlorinated water for conditions equivalent to those conditions under which the test data were obtained. The performance of a material or piping product under actual conditions of installation and use is dependent upon a number of factors including installation methods, use patterns, water quality, nature and magnitude of localized stresses, and other variables of an actual, operating hot-and-cold water distribution system that are not addressed in this test method. As such, the extrapolated values do not constitute a representation that a PP pipe or system with a given extrapolated time-to-failure value will perform for that period of time under actual use conditions.