道路车辆液化天然气（LNG）燃料系统部件第20部分:柔性燃料或排气管

[中文适用范围]： 本文件规定了柔性燃油管路的测试和要求。柔性燃油管路是一种液化天然气燃油系统部件，旨在用于 ISO 3833 定义的各类机动车辆。本文件不适用于以下设备：a) 燃油容器；b) 固定式燃气发动机；c) 容器安装硬件；d) 电子燃油管理；e) 加油容器。注 1：可以检查本文未具体涉及的其他组件是否符合本文件的标准，并根据适当的功能测试进行测试。注 2：除非另有规定，本文件中所有提到的压力均为表压。注 3：本文件基于天然气作为燃料的工作压力 1.6 MPa（16 bar）。（1 bar = 0.1 MPa = 105 Pa；1 MPa = 1 N/mm2。）通过调整适当的系数（比率）压力，可以适应其它工作压力。例如，2 MPa (20 bar) 的工作压力系统需要将压力乘以 1.25。 [外文原描述]： This document specifies tests and requirements for the flexible fuel lines, a liquefied natural gas fuel system component intended for use on the types of motor vehicles defined in ISO 3833. This document is not applicable to the following: a) fuel containers; b) stationary gas engines; c) container mounting hardware; d) electronic fuel management; e) refuelling receptacles. NOTE 1 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. NOTE 2 All references to pressure in this document are considered gauge pressures unless otherwise specified. NOTE 3 This document is based upon a working pressure for natural gas as a fuel of 1,6 MPa (16 bar). (1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm 2 .) Other working pressures can be accommodated by adjusting the pressure by the appropriate factor (ratio). For example, a 2 MPa (20 bar) working pressure system will require pressures to be multiplied by 1,25.