道路车辆 压缩天然气(CNG)燃料系统部件 第15部分:防气罩和通风软管

[中文适用范围]： ISO 15500 的本部分规定了用于 ISO 3833 中定义的机动车辆类型的气密外壳和通风软管、压缩天然气燃料系统组件的测试和要求。 ISO 15500 的本部分适用于使用天然气的车辆符合 ISO 15403-1 的气体（单燃料、双燃料或双燃料应用）。 它不适用于以下各项： a) 位于汽化器上游（包括汽化器）的液化天然气（LNG）燃料系统组件； b) 燃料容器； c) 固定式燃气发动机； d) 容器安装硬件； e) 电子燃油管理； f) 加油容器。 注 1：公认的是，本文未具体涵盖的其他组件可以进行检查，以满足 ISO 15500 本部分的标准，并根据适当的功能测试进行测试。 注 2：除非另有规定，ISO 15500 本部分中所有提及的压力均应视为表压。 注 3：ISO 15500 的本部分基于天然气作为燃料的工作压力，在 15 °C 时为 20 MPa (200 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，25 MPa (250 bar) 工作压力系统需要将压力乘以 1.25。 [外文原描述]： ISO 15500-15:2015 specifies tests and requirements for the gas-tight housing and ventilation hose, compressed natural gas fuel system components intended for use on the types of motor vehicles defined in ISO 3833. This part of ISO 15500 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) liquefied natural gas (LNG) fuel system components located upstream of, and including, the vaporizer; b) fuel containers; c) stationary gas engines; d) container mounting hardware; e) electronic fuel management; f) refuelling receptacles. NOTE 1 It is recognized that miscellaneous components not specifically covered herein can be examined to meet the criteria of this part of ISO 15500 and tested according to the appropriate functional tests. NOTE 2 All references to pressure in this part of ISO 15500 are to be considered gauge pressures unless otherwise specified. NOTE 3 This part of ISO 15500 is based upon a service pressure for natural gas as a fuel of 20 MPa (200 bar[1]) settled at 15 °C. Other service pressures can be accommodated by adjusting the pressure by the appropriate factor (ratio). For example, a 25 MPa (250 bar) service pressure system will require pressures to be multiplied by 1,25. [1] 1 bar = 0,1 MPa = 10 5 Pa; 1 MPa = 1 N/mm 2 .