本文件规定了由未增塑聚酰胺（PA-U）制成的阀门的特性，符合ISO？16486-1，旨在掩埋并用于供应气体燃料。 它适用于隔离带有插口端或电熔插座的单向和双向阀门，这些阀门旨在与符合ISO？16486-2和ISO？分别为16486-3。 根据ISO，允许在PA-U管道系统中使用由非增塑聚酰胺材料制成的符合相关标准的气体燃料供应阀门？16486？系列，前提是它们具有用于对接融合或电融合端的相关PA-U连接（参见ISO？16486-3）。组件（即完整阀门）必须满足本文件的要求。本文件还规定了其描述的测试方法的测试参数。 结合ISO 16486-1、ISO 16486-2、ISO 16486-3和ISO 16486-5，本文件适用于PA-U阀门及其接头，以及使用PA-U部件和其他材料的接头，这些部件预期用于以下条件: a)最大工作压力(MOP)不超过18？吧[1]，还是限16？在区域CEN要求下，参考温度为20？C用于设计目的； 笔记？1？就本文件和ISO参考文献而言？8233，MOP被认为是标称压力。 b)工作温度为？20？℃至40℃？°C； 笔记？2？对于工作温度在20？°C和40？°C，降额系数在ISO？16486-5. 本文件涵盖公称外径dn≤400的管道用阀门？嗯。 ？ [1]1？酒吧=0,1？MPa=105帕；1？MPa=1？N/mm2。

This document specifies the characteristics of valves 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 is applicable to isolating unidirectional and bi-directional valves with spigot ends or electrofusion sockets intended to be fused with PA-U pipes or fittings conforming to ISO？16486-2 and ISO？16486-3 respectively. Valves made from material other than unplasticized polyamide designed for the supply of gaseous fuels conforming to the relevant standards are permitted to be used in PA-U piping systems according to the ISO？16486？series provided they have relevant PA-U connections for butt fusion or electrofusion ends (see ISO？16486-3). The component, i.e. the complete valve, is required to fulfil the requirements of this document. This document also specifies the test parameters for the test methods it describes. In conjunction with ISO 16486-1, ISO 16486-2, ISO 16486-3 and ISO 16486-5, this document is applicable to PA-U valves and their joints and to joints with components of PA-U and other materials intended to be used under the following conditions: a) a maximum operating pressure (MOP) of up to and including 18？bar[1], or limited to 16？bar under regional CEN requirements, at a reference temperature of 20？°C for design purposes; NOTE？1？For the purpose of this document and the references to ISO？8233, MOP is considered to be nominal pressure. b) an operating temperature of？20？°C to 40？°C; NOTE？2？For operating temperatures between 20？°C and 40？°C, derating coefficients are specified in ISO？16486-5. This document covers valves for pipes with a nominal outside diameter, d_n, ≤ 400？mm. ？ [1] 1？bar = 0,1？MPa = 10⁵ Pa; 1？MPa = 1？N/mm2.