ISO 21307:2017确立了根据相关ISO标准规定的聚乙烯（PE）管道系统部件对接熔焊施工和质量评估程序的一般原则。这些部件的安装符合相关实践规范、国家法规或行业指南。具体而言，本文件规定了聚乙烯管道和管件的三种对接熔焊程序。这些是: -单一低压熔接工艺； -双低压熔接工艺； -单一高压熔焊程序。 ISO 21307:2017考虑了所使用的材料和组件、熔焊程序和设备以及完工接头的质量评估。 它可以与适当的国家法规和标准结合使用。

ISO 21307:2017 establishes general principles regarding the procedure used in the construction and quality assessment of butt fusion jointing of polyethylene (PE) piping system components specified in accordance with relevant ISO standards. These components are installed in accordance with the relevant codes of practice, national regulations or industry guidance. Specifically, this document specifies three butt fusion jointing procedures for PE pipes and fittings. These are: - single low-pressure fusion jointing procedure; - dual low-pressure fusion jointing procedure; - single high-pressure fusion jointing procedure. ISO 21307:2017 takes into consideration the materials and components used, the fusion jointing procedure and equipment and the quality assessment of the completed joint. It can be applied in conjunction with appropriate national regulations and standards.