道路车辆. 液化天然气(LNG)燃料系统部件. 第3部分: 止回阀

[中文适用范围]： 本文件规定了止回阀的测试和要求，止回阀是一种液化天然气燃料系统部件，旨在用于 ISO 3833 中定义的机动车辆类型。 本文件不适用于以下各项： a) 燃料容器； c) 容器安装硬件； e) 加油容器。 b) 固定式燃气发动机； d) 电子燃油管理；人们认识到，可以检查本文中未具体涵盖的各种组件以满足本文件的标准，并根据适当的功能测试进行测试。 除非另有说明，本文件中所有提及的压力均应视为表压。 本文件基于天然气作为燃料的工作压力为 1.6 MPa [16 bar1)]。 通过适当的系数（比率）调整压力可以适应其他工作压力。 例如，2 MPa (20 bar) 工作压力系统将需要压力乘以 1.25。 [外文原描述]： This document specifies tests and requirements for the check valve, 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. 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. This document is based upon a working pressure for natural gas as a fuel of 1,6 MPa [16 bar 1 ]. Other working pressures can be accommodated by adjusting the pressure by the appropriate factor (ratio). For example, 2 MPa (20 bar) working pressure system will require pressures to be multiplied by 1,25. 1 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm 2 .