1.1 本规范涵盖了与外径受控交联聚乙烯（PEX）管一起使用的聚乙烯（PE 4710）电熔配件，由规范涵盖 F2788/F2788M , F2905/F2905M 和 F2968/F2968M . 如这些PEX管道标准所述，连接到这些PE 4710电熔配件的PEX管道在73°C时的HDB为1250 psi或1600 psi °F（23 °C）根据试验方法 D2837 . 规范中规定了根据这三种管道标准制造的与PEX管道一起使用的所有公制和英制管件的要求 F2829/F2829M . 1.2 根据本标准制造的电熔配件的最大允许工作温度仅限于已确定PE 4710 HDB的最高温度。 当连接到HDB温度较高的PEX管道时，PE/PEX接头的最高使用温度仅限于配件中PE材料的高温HDB额定值 注1: PEX和PE 4710材料可以具有不同的高温额定值，当连接在一起时，较低的最大高温额定值将限制最大工作温度。每 表1 ，所需的PE 4710材料必须在140处具有HDB 华氏度（60 °C），但在180°C时可能有HDB 华氏度（82 °C）。PEX管道的HDB额定值通常为180°F（82 °C）或200 华氏度（93 °C）或两者。当连接到PEX管时，根据本标准制造的PE 4710电熔配件可将最高工作温度限制在140℃ 华氏度（60 °C），其中使用的PE 4710材料没有可选的更高温度HDB额定值。 1.3 包括材料、工艺和鉴定测试性能的要求。PE电熔配件制造商应确保根据本规范生产的配件符合本规范的所有要求。如果PEX管道制造商认为其管道适合连接到聚乙烯（PE）电熔配件，PEX管道制造商应通过测试用这些PE电熔配件制成的接头，并确保接头满足本规范的性能要求，来鉴定其PEX管道。 1.4 以英寸-磅为单位的数值应视为标准值。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 1.5 以下安全隐患警告仅适用于试验方法部分第节 9 ，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。 1.6 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 polyethylene (PE 4710) electrofusion fittings for use with outside diameter-controlled crosslinked polyethylene (PEX) pipe, covered by Specifications F2788/F2788M , F2905/F2905M and F2968/F2968M . As stated in these PEX pipe standards, the PEX pipes joined to these PE 4710 electrofusion fittings have an HDB of 1250 psi or 1600 psi at 73 °F (23 °C) per Test Method D2837 . Requirements for all metric-sized and inch-sized fittings for use with PEX pipe, made in accordance to these three pipe standards, are specified in Specification F2829/F2829M . 1.2 The maximum allowable operating temperature of electrofusion fittings made in accordance with this standard is limited to the highest temperature at which the HDB of the PE 4710 has been determined. When joined to PEX pipe having a higher temperature HDB, the maximum use temperature for the PE/PEX joint is limited to the elevated temperature HDB rating of the PE material in the fitting Note 1: PEX and PE 4710 materials can have different elevated temperature ratings, and when joined together, the lower maximum elevated temperature rating will limit the maximum operating temperature. Per Table 1 , the required PE 4710 material must have an HDB at 140 °F (60 °C), but may have an HDB at 180 °F (82 °C). PEX pipes generally have HDB ratings at 180 °F (82 °C) or 200 °F (93 °C) or both. When joined to PEX pipe, PE 4710 electrofusion fittings made in accordance with this standard may limit the maximum operating temperature to 140 °F (60 °C) where the PE 4710 material used does not have an optional higher temperature HDB rating. 1.3 Requirements for materials, workmanship, and qualification testing performance are included. The PE electrofusion fitting manufacturer shall assure that fittings produced in accordance with this specification comply with all the requirements of this specification. If a PEX pipe manufacturer deems that their pipe is suitable for joining to polyethylene (PE) electrofusion fittings, the PEX pipe manufacturer shall qualify their PEX pipe by testing joints made with these PE electrofusion fittings, and assuring that the joints meet the performance requirements of this specification. 1.4 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. 1.5 The following safety hazards caveat pertains only to the test method portion, Section 9 , 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. 1.6 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.