本文件规定了根据ISO 16486‑1由未增塑聚酰胺（PA-U）制成的配件的物理和机械性能，这些配件将被埋入地下并用于供应气体燃料。 它还为它所引用的测试方法指定测试参数。 ISO 16486系列适用于PA-U管道系统，其部件通过熔焊和/或机械连接连接。 此外，还规定了配件标记的尺寸特征和要求。 本文件与ISO 16486系列的其他部分一起适用 PA-U配件、其接头、与PA-U组件的接头以及与其他材料机械配件的接头，以及以下配件类型: -熔合配件（电熔配件和熔对接配件），以及 -过渡配件。

This document specifies the physical and mechanical properties of fittings made from unplasticized polyamide (PA-U) in accordance with ISO 16486‑1, intended to be buried and used for the supply of gaseous fuels. It also specifies the test parameters for the test methods to which it refers. The ISO 16486 series is applicable to PA-U piping systems, the components of which are connected by fusion jointing and/or mechanical jointing. In addition, it lays down dimensional characteristics and requirements for the marking of fittings. In conjunction with the other parts of the ISO 16486 series, this document is applicable to PA-U fittings, their joints, joints with components of PA-U and joints with mechanical fittings of other materials, and to the following fitting types: — fusion fittings (electrofusion fittings and butt fusion fittings), and — transition fittings.