ISO 12614-1:2021 Road vehicles — Liquefied natural gas (LNG) fuel system components —Part 1: General requirements and definitions
标准简介
Road vehicles — Liquefied natural gas (LNG) fuel system components —Part 1: General requirements and definitions由ISO于2021‑06‑04发布，适用于国际范围。标准截图
标准文档说明
标准文档类型为Road vehicles — Liquefied natural gas (LNG) fuel system components —Part 1: General requirements and definitions高清PDF版本（文字版），标准文档内可进行搜索，可以复制原文，可粘贴。标准部分原文
INTERNATIONAL STANDARD ISO 12614-1:2021
Road vehicles — Liquefied natural gas (LNG) fuel system components —
Part 1: General requirements and definitions
1 Scope
This document specifies general requirements and definitions of liquefied natural gas fuel system components, intended for use on the types of motor vehicles as defined in ISO 3833. It also provides general design principles and specifies requirements for instructions and marking.
This document is not applicable to the following:
a) fuel containers;
b) stationary gas engines;
c) container mounting hardware;
d) electronic fuel management;
e) fuelling 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.
1)
This document is based upon a working pressure for natural gas as fuel of 1,6 MPa [16 bar ]. 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.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 6722 (all parts), Road vehicles — 60 V and 600 V single-core cables
ISO 12614 (all parts), Road vehicles — Liquefied natural gas (LNG) fuel system components
ISO 15500 (all parts), Road vehicles — Compressed natural gas (CNG) fuel system components
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
1) 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2.
ISO 12614-1:2021
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
3.1
burst pressure
static pressure which causes failure and consequential fluid loss through the component envelope
Note 1 to entry: It is the highest pressure during a burst test.
3.2
electronic control unit
ECU
device for control of the engine
3.3
fitting
connector used in joining a piping, tubing, or hose system
3.4
flexible fuel line
flexible tubing or hose through which natural gas flows
3.5
fuel content gauge
system that measures the level of the liquid in the fuel tank
3.6
differential pressure fuel content gauge
fuel content gauge (3.5) based on the difference of the pressure at the top and bottom parts of the fuel tank (the system measures the weight of the liquid)
3.7
capacitance fuel content gauge
device that measures changes in fuel level through indirect or direct capacitive sensing techniques
3.8
gas temperature sensor
device for gas temperature measurement, which is placed downstream of the vaporizer (3.10)
3.9
gas tight housing
device which vents gas leakage to outside the vehicle, including the gas ventilation hose
3.10
heat exchanger
vaporizer device for vaporizing the cryogenic liquid fuel and delivering it as gas to the engine
3.11
liquefied natural gas
LNG
natural gas which has been liquefied after processing for storage, transportation, or use as a fuel
3.12
LNG vehicle
vehicle which is using liquefied natural gas (3.11) as a source of gaseous fuel for its engine
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