本文件规定了气密壳和通风软管的试验和要求，气密壳和通风软管是一种液化天然气燃料系统部件，用于ISO 3833中定义的机动车类型。 本文件适用于根据ISO 15403-1（单燃料、双燃料或双燃料应用）使用天然气的车辆。它不适用于以下情况: a） 燃料容器；b） 固定式燃气发动机；c） 集装箱安装硬件；d） 电子燃料管理；e） 加油容器。 应认识到，本文未具体涵盖的其他部件可进行检查，以符合本文件的标准，并根据适当的功能测试进行测试。 除非另有规定，否则本文件中提及的所有压力均应视为表压。 购买本文件时可获得的所有当前修订均包含在购买本文件中。

This document specifies tests and requirements for the gas-tight housing and ventilation hose, a liquefied natural gas fuel system component intended for use on the types of motor vehicles defined in ISO 3833. This document is applicable to vehicles using natural gas in accordance with ISO 15403-1 (mono-fuel, bi-fuel, or dual-fuel applications). It is not applicable to the following: a) fuel containers;b) stationary gas engines;c) container mounting hardware;d) electronic fuel management;e) refuelling receptacles. It is recognized that miscellaneous components not specifically covered herein can be examined to meet the criteria of this document and tested according to the appropriate functional tests. All references to pressure in this document are to be considered gauge pressures unless otherwise specified.All current amendments available at time of purchase are included with the purchase of this document.