ISO 12614-16:2021 Road vehicles — Liquefied natural gas (LNG) fuel system components —Part 16: Heat exchanger-vaporizer
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Road vehicles — Liquefied natural gas (LNG) fuel system components —Part 16: Heat exchanger-vaporizer是国际标准化组织(International Organization for Standardization，简称ISO)发布的ISO标准，适用于全球。标准截图
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INTERNATIONAL STANDARD ISO 12614-16:2021
Road vehicles — Liquefied natural gas (LNG) fuel system components —
Part 16: Heat exchanger-vaporizer
1 Scope
This document specifies tests and requirements for the heat exchanger-vaporizer, 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.
1)
This document is based upon a working pressure for natural gas as a 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 12614-1, Road vehicles — Liquefied natural gas (LNG) fuel system components — Part 1: General requirements and definitions
ISO 12614-2, Road vehicles — Liquefied natural gas (LNG) fuel system components — Part 2: Performance and general test methods
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IS 1O2614-1 and the following apply.
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
2
1) 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm .
ISO 12614-16:2021
— IEC Electropedia: available at http://www.electropedia.org/
3.1
vaporizer design pressure
pressure equal to or higher than the maximum pump discharge pressure or the working pressure MAWP of the LNG tank, whichever is greater
4 Marking
Marking of the component shall provide sufficient information to allow the following to be traced:
a) the manufacturer’s or the agent’s name, trademark, or symbol;
b) the model designation (part number);
c) the maximum allowable pressure for gas and coolant space;
d) the maximum and minimum working temperature;
e) the serial number or date code.
The following additional markings are recommended:
i) the direction of flow (when necessary for correct installation);
ii) the type of fuel;
iii) electrical ratings (if applicable);
iv) the symbol of the certification agency;
v) the type approval number;
vi) a reference to this document (i.e. ISO 12614-16).
NOTE This information can be provided by a suitable identification code on at least one part of the component when it consists of more than one part.
5 Construction and assembly
The heat exchanger-vaporizer shall comply with the applicable provisions of ISO 12614-1 and ISO 12614-2, and with the tests specified in Clause 6.
The fittings shall be compatible with rigid fuel line.
6 Test
6.1 Applicability
The tests required to be carried out are indicated in Table 1.
Table 1 — Tests applicable
Test procedure as re- Specific test requirements Test Applicable
quired byISO 12614-2 of this document
Hydrostatic strength X X X (see 6.2)
Leakage* X X *
Test the natural gas space.
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