1.1 本规范涵盖了与规范一起使用的公制和英制管件的性能要求、测试方法和标记要求 F2788/F2788M , F2905/F2905M 和 F2968/F2968M PEX管。以下描述了配件的性能要求-73 °F[23 °C]静水压强度，176 华氏度[80度 °C]静水压强度、短期内耐压、抗拉伸载荷、电熔配件在最低和最高推荐温度下的内聚阻力、鞍座配件的抗冲击性，以及机械配件的密封性和拉拔试验。本规范涵盖的公制和英制部件用于上述用途- 地面和埋地压力管道应用，如工业和通用管道，饮用水管道高达140 华氏度[60度 °C]，灭火管道。 1.2 PEX管的交联要求见规范 F2788/F2788M , F2905/F2905M 和 F2968/F2968M . 1.3 包括材料、工艺和鉴定测试性能的要求。 1.4 本规范的文本参考了注释、脚注和附录，这些注释、脚注和附录提供了解释性材料。这些注释和脚注（不包括表和图中的注释和脚注）不应视为本规范的要求。 1.5 以英寸为单位的数值- 磅单位或国际单位应单独视为标准。在文本中，国际单位用括号表示。每个系统中规定的值可能不是精确的等效值:因此，每个系统应独立于另一个系统使用。将两个系统的值合并可能会导致不符合标准。 注1: 管道和配件的建议静水压设计应力和静水压额定值列于 附录X1 . 中讨论了设计、组装和安装注意事项 附录X2 . 推荐采用可选的性能鉴定和厂内质量控制程序 附录X3 . 1.6 以下安全隐患警告仅适用于试验方法部分第节 7. ，本规范: 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。 1.7 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。

1.1 This specification covers performance requirements, test methods, and marking requirements for metric- and inch-sized fittings for use with Specification F2788/F2788M , F2905/F2905M , and F2968/F2968M PEX pipe. The following performance requirements are described for the fittings – 73 °F [23 °C] hydrostatic strength, 176 °F [80 °C] hydrostatic strength, short-term internal pressure resistance, resistance to tensile loads, cohesive resistance for electrofusion fittings at both the minimum and maximum recommended temperatures, impact resistance for saddle fittings, and leak tightness and pull out tests for mechanical fittings. The metric- and inch-sized components covered by this specification are intended for the above-ground and buried pressure piping applications, such as industrial and general-purpose pipelines, potable water pipelines up to 140 °F [60 °C], fire – extinguishing pipelines. 1.2 Crosslinking requirements for PEX pipe are found in Specifications F2788/F2788M , F2905/F2905M , and F2968/F2968M . 1.3 Requirements for materials, workmanship, and qualification testing performance are included. 1.4 The text of this specification references notes, footnotes, and appendixes, which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification. 1.5 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text the SI units are shown in brackets. The values stated in each system may not be exact equivalents: therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. Note 1: Suggested hydrostatic design stresses and hydrostatic pressure ratings for pipe and fittings are listed in Appendix X1 . Design, assembly, and installation considerations are discussed in Appendix X2 . An optional performance qualification and an in-plant quality control program are recommended in Appendix X3 . 1.6 The following safety hazards caveat pertains only to the test method portion, Section 7 , of this specification: 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. 1.7 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.