1.1 本规范规定了用于重型建筑、岩土工程、商业和住宅板桩的硬质聚氯乙烯（PVC）外部型材的材料性能和物理性能要求，包括尺寸公差。还提供了符合本规范的外部型材挤压件的测试和识别方法。 1.2 这些外部型材中使用的材料仅限于单一均匀挤出或两个或多个PVC化合物在不同层中共挤的刚性PVC化合物。 1.3 以英寸-磅为单位的数值应视为标准值。 1.4 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。 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》中确立的国际公认标准化原则制定的。

1.1 This specification establishes requirements for the material properties and physical properties, including dimensional tolerances, of rigid poly(vinyl chloride) (PVC) exterior profiles used for heavy construction, geotechnical, commercial, and residential sheet piling. Methods for testing and for identifying exterior profile extrusions that comply with this specification are also provided. 1.2 The material used in these exterior profiles is limited to rigid PVC compounds in a single homogeneous extrusion or in a coextrusion of two or more PVC compounds in distinct layers. 1.3 The values stated in inch-pound units are to be regarded as the standard. 1.4 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.