1.1 本规范涵盖了冷膨胀配件和交联（PEX）加强环，用于标称管径为 3. / 8. , 1. / 2. , 5. / 8. , 3. / 4. , 1, 1 1. / 4. 1. 1. / 2. , 2, 2 1. / 2. 和3英寸，符合规范要求 F876 或 F3253 适用于标称管径为的高温聚乙烯（PE-RT）管 3. / 8. , 1. / 2. , 5. / 8. , 3. / 4. , 1, 1 1. / 4. 1. 1. / 2. , 2, 2 1. / 2. ，3符合规范要求 F2769 这些配件适用于在高达180°F（82°C）的温度下运行的100 psi（690 kPa）冷热水分配系统。该系统由PEX加强环和冷膨胀接头组成。包括对配件组件上使用的材料、工艺、尺寸和标记的要求。 本规范涵盖的组件适用于住宅和商业、冷热、饮用水分配系统以及建筑供水管线、密封中央供暖，包括地板下供暖系统。 1.2 以英寸-磅单位表示的值应被视为标准值。括号中给出的值是对国际单位制的数学转换，仅供参考，不被视为标准值。 1.3 本标准并不旨在解决与其使用相关的所有安全问题（如果有的话）。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，并确定监管限制的适用性。 1.4 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 covers cold expansion fittings and cross-linked (PEX) reinforcing rings for use with cross-linked polyethylene (PEX) plastic tubing in nominal tubing sizes of 3 / 8 , 1 / 2 , 5 / 8 , 3 / 4 , 1, 1 1 / 4 , 1 1 / 2 , 2, 2 1 / 2 , and 3 in. that meet the requirements of Specification F876 or F3253 and for use with Polyethylene of Raised Temperature (PE-RT) pipe in nominal tubing sizes of 3 / 8 , 1 / 2 , 5 / 8 , 3 / 4 , 1, 1 1 / 4 , 1 1 / 2 , 2, 2 1 / 2 , and 3 that meet the requirements of Specification F2769 . These fittings are intended for use in 100 psi (690 kPa) cold- and hot-water distribution systems operating at temperatures up to and including 180 °F (82 °C). The system is comprised of a PEX reinforcing ring and a cold expansion fitting. Included are the requirements for materials, workmanship, dimensions, and markings to be used on the fitting components. The components covered by this specification are intended for use in residential and commercial, hot and cold, potable water distribution systems as well as building supply lines, sealed central heating, including under-floor-heating systems. 1.2 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. 1.3 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. 1.4 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.