1.1本规范规定了用于农业、商业、住宅围栏和栏杆的硬质聚氯乙烯（PVC）外部型材的材料性能和物理性能要求，包括尺寸公差、挤出质量和耐候性。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。 注1:有关应用、组装和安装的信息应根据ASTM XXXX从制造商处获得。 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聚氯乙烯（PVC）化合物。 1.3颜色保持指南在附录中提供，用于制造商的产品开发和质量性能使用。 1.4以英寸-磅为单位的数值应视为标准值。括号中的值仅供参考。 1.5 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和健康实践，并确定监管限制的适用性。

1.1 This specification establishes requirements for the material properties and physical properties, including dimensional tolerances, extrusion quality, and weatherability, of rigid poly vinyl-chloride (PVC) exterior profiles used for agricultural, commercial, residential fencing and railing. Methods for testing and for identifying exterior profile extrusions that comply with this specification are also provided. Note 1—Information with regard to application, assembly, and installation should be obtained from the manufacturer and/or per ASTM XXXX. 1.2 The material used in these exterior-profiles is limited to rigid poly (vinyl chloride) (PVC) compounds in a single homogeneous extrusion or in a coextrusion of two or more PVC compounds in distinct layers. 1.3 Color-hold guidelines are provided in an appendix for the manufacturer's product development and quality performance use. 1.4 The values stated in inch-pound units are to be regarded as the standard. The values in parentheses are provided for information only. 1.5 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 and health practices and determine the applicability of regulatory limitations prior to use.