1.1 本规程描述了通过电熔连接技术与聚烯烃管道和配件制作接头的一般程序。本规程适用于使用电阻丝作为加热元件的电熔配件。这些应视为一般程序，而不是制造商规定的安装程序的替代品。应要求制造商提供加入其产品的具体建议。本规程并不旨在解决所有可能的电熔连接程序，也不排除使用由其他方开发的经证明可产生可靠电熔接头的合格程序。 注1: 本规范中提及的制造商定义为电熔配件制造商。 1.2 所涵盖的技术仅适用于连接相关聚合物化学的聚烯烃管道和配件，例如，使用聚乙烯电熔配件将聚乙烯连接到聚乙烯。有关电熔配件与待连接的特定管道或配件材料的兼容性，请参阅制造商的建议。 1.3 所述电熔连接技术可以在聚烯烃管道和配件之间产生良好的接头，前提是所涉及的所有产品（即管道和配件）符合适当的ASTM规范。 1.4 这种做法不受管道或管件尺寸的限制，但当电熔连接到较大直径的管道时，可能需要额外的步骤或程序。有关连接其产品的其他具体说明，请咨询配件制造商。 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、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。 ====意义和用途====== 4.1 使用第节中的程序 8. 和 9 根据制造商的说明和设备，可以在制造商推荐的与管道本身强度相同的管道组合之间进行压力密封接头。

1.1 This practice describes general procedures for making joints with polyolefin pipe and fittings by means of electrofusion joining techniques. This practice is applicable to electrofusion fittings that utilize resistance wire as the heating element. These should be regarded as general procedures and not as a substitute for the installation procedures specified by the manufacturers. Manufacturers should be requested to supply specific recommendations for joining their products. This practice does not purport to address all possible electrofusion joining procedures, or to preclude the use of qualified procedures developed by other parties that have been proven to produce reliable electrofusion joints. Note 1: Reference to the manufacturer in this practice is defined as the electrofusion fitting manufacturer. 1.2 The techniques covered are applicable only to joining polyolefin pipe and fittings of related polymer chemistry, for example, polyethylenes to polyethylenes using a polyethylene electrofusion fitting. Consult the manufacturer's recommendations for compatibility of the electrofusion fitting with the specific pipe or fitting material to be joined. 1.3 The electrofusion joining technique described can produce sound joints between polyolefin pipe and fittings, provided that all products involved (that is, pipe and fittings) meet the appropriate ASTM specifications. 1.4 This practice is not limited by pipe or fitting size, however additional steps or procedures may be necessary when electrofusion joining to pipe of larger diameters. Consult the fitting manufacturer for additional specific instructions for joining their product. 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, 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. ====== Significance And Use ====== 4.1 Using the procedures in Sections 8 and 9 , the manufacturer's instructions and equipment, pressure-tight joints can be made between manufacturer-recommended combinations of pipe that are as strong as the pipe itself.