1.1 本规范规定了带有整体泡沫塑料衬里的乙烯基墙板的要求，其中墙板由硬质PVC化合物制成。本标准规定的性能要求和试验方法包括材料性能和尺寸、翘曲、收缩、冲击强度、膨胀、外观、火焰蔓延和抗风载荷。还提供了指示符合本规范的方法。 注1: 背衬乙烯基墙板由两个主要部件组成:墙板和背衬。壁板部分应符合规范要求 D3679 .规范的适用部分 D3679 包含在本规范中。还包括仅与作为单独材料的背衬或与作为一个整体的壁板和背衬的组合有关的附加要求。 1.2 根据适用要求或测试方法的规定，应在背衬材料就位或移除的情况下对背衬乙烯墙板进行测试。 1.3 本产品中PVC再生塑料的使用应符合第节的要求 4. . 1.4 按照本规范生产的壁板应按照实践进行安装 D4756 .对于要安装的特定产品，还应参考制造商的安装说明。 注2: 应从制造商处获得有关侧线维护的信息。 1.5 以英寸磅为单位的数值应视为标准。括号中给出的值是国际单位制的数学转换，仅供参考，不被视为标准。 1.6 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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3: 目前还没有与该标准等效的ISO。 1.7 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《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。

1.1 This specification establishes requirements for vinyl siding with integral foam plastic backing, where the siding is manufactured from rigid PVC compound. Performance requirements and test methods addressed by this standard include materials properties and dimensions, warp, shrinkage, impact strength, expansion, appearance, flame spread, and wind load resistance. Methods of indicating compliance with this specification are also provided. Note 1: Backed vinyl siding is composed of two major components: the siding and the backing. It is intended that the siding portion comply with Specification D3679 . Applicable portions of Specification D3679 are included in this specification. Additional requirements that pertain only to the backing as a separate material, or to the combination of siding and backing as a whole, are also included. 1.2 Backed vinyl siding shall be tested with the backing material in place or removed, as specified in the applicable requirement or test method. 1.3 The use of PVC recycled plastic in this product shall be in accordance with the requirements in Section 4 . 1.4 Siding produced to this specification shall be installed in accordance with Practice D4756 . Reference shall also be made to the manufacturer's installation instructions for the specific product to be installed. Note 2: Information with regard to siding maintenance shall be obtained from the manufacturer. 1.5 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. 1.6 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 3: 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.