1.1 本试验方法包括在规定的冲击条件下，通过落锤测定开裂或断裂硬质聚氯乙烯（PVC）型材所需的能量。 1.2 本试验方法可以单独使用，也可以与其他方法结合使用，以测量PVC产品的韧性。 1.3 由于型材尺寸和形状的多样性以及制造程序和现场滥用的多样性，本试验方法并非普遍适用于所有类型的滥用。因此，必须根据需要建立相关性。 1.4 本标准的文本引用了提供解释材料的注释和脚注。这些注释和脚注（不包括表和图中的注释和脚注）不应视为本标准的要求。 1.5 以英寸-磅为单位的数值应视为标准值。 1.6 本标准并非旨在解决与其使用相关的所有安全问题（如有）。 本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 注1: 没有已知的ISO等效于本标准。 1.7 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》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 PVC型材的冲击强度与服务的适用性和加工质量有关。冲击试验用于质量控制目的，并作为产品在装配、安装或使用期间能够承受搬运的指示。 5.2 通过使用本试验方法获得的结果有两种使用方式: 5.2.1 作为在产品标准中确定冲击试验要求的基础，以及 5.2.2 测量材料或加工变化的影响。

1.1 This test method covers the determination of the energy required to crack or break rigid poly(vinyl chloride) (PVC) profile under specified conditions of impact by means of a falling weight. 1.2 This test method is used either by itself or in conjunction with other methods for measuring PVC product toughness. 1.3 Because of the wide variety of profile sizes and shapes and the wide variety of manufacturing procedures and field abuse, this test method does not correlate universally with all types of abuse. Therefore, correlations must be established as needed. 1.4 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of this standard. 1.5 The values stated in inch-pound units are to be regarded as the standard. 1.6 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. Note 1: There is no known ISO equivalent to this standard. 1.7 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 The impact strength of PVC profiles relates to suitability for service and to quality of processing. Impact tests are used for quality-control purposes and as an indication that products can withstand handling during assembling, installation, or in service. 5.2 Results obtained by use of this test method are used in two ways: 5.2.1 As the basis for establishing impact-test requirements in product standards, and 5.2.2 To measure the effect of changes in materials or processing.