ISO 12614-2:2014
(Main)Road vehicles — Liquefied natural gas (LNG) fuel system components — Part 2: Performance and general test methods
Road vehicles — Liquefied natural gas (LNG) fuel system components — Part 2: Performance and general test methods
ISO 12614-2:2014 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. ISO 12614-2:2014 is also applicable to other LNG-fueled motor vehicles (for example ships) as far as appropriate, until any specific norm would be worked out for such a type of vehicle. It also provides general design principles, and specifies requirements for instructions and marking. ISO 12614-2:2014 is not applicable to the following: a) fuel containers; b) stationary gas engines; c) container mounting hardware; d) electronic fuel management; e) refueling receptacles.
Véhicules routiers — Équipements pour véhicules utilisant le gaz naturel liquéfié (GNL) comme combustible — Partie 2: Performances et méthodes d'essai générales
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INTERNATIONAL ISO
STANDARD 12614-2
First edition
2014-07-01
Road vehicles — Liquefied natural gas
(LNG) fuel system components —
Part 2:
Performance and general test
methods
Véhicules routiers — Équipements pour véhicules utilisant le gaz
naturel liquéfié (GNL) comme combustible —
Partie 2: Performances et méthodes d’essai générales
Reference number
ISO 12614-2:2014(E)
©
ISO 2014
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ISO 12614-2:2014(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2014
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
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Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2014 – All rights reserved
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ISO 12614-2:2014(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General . 2
5 Hydrostatic strength . 2
6 Leakage. 2
7 Excess torque resistance . 3
8 Bending moment . 3
9 Continued operation. 4
9.1 General . 4
9.2 Components, which are intended to be used at temperatures less than −40 °C . 5
9.3 Components, which are not intended to be used at temperatures less than −40 °C . 5
10 Corrosion resistance . 5
11 Oxygen ageing . 5
12 Electrical overvoltages . 6
13 Non-metallic material immersion
. 6
14 Vibration resistance . 6
15 Brass material compatibility . 6
Bibliography . 8
© ISO 2014 – All rights reserved iii
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ISO 12614-2:2014(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 22, Road vehicles, Subcommittee SC 25, Vehicles
using gaseous fuels.
ISO 12614 consists of the following parts, under the general title Road vehicles — Liquefied natural gas
(LNG) fuel system components:
— Part 1: General requirements and definitions
— Part 2: Performance and general test methods
— Part 3: Check valve
— Part 4: Manual valve
— Part 5: Tank pressure gauge
— Part 6: Pressure regulator
— Part 7: Pressure relief valve
— Part 8: Excess flow valve
— Part 9: Gas-tight housing and ventilation hose
— Part 10: Rigid fuel line in stainless steel
— Part 11: Fittings
— Part 12: Rigid fuel line in copper and its alloys
— Part 13: Pressure control regulator
— Part 14: Differential pressure fuel content gauge
— Part 15: Capacitance fuel content gauge
iv © ISO 2014 – All rights reserved
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ISO 12614-2:2014(E)
— Part 16: Heat exchanger – vaporizer
— Part 17: Natural gas detector
— Part 18: Gas temperature sensor
© ISO 2014 – All rights reserved v
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INTERNATIONAL STANDARD ISO 12614-2:2014(E)
Road vehicles — Liquefied natural gas (LNG) fuel system
components —
Part 2:
Performance and general test methods
1 Scope
This part of ISO 12614 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. This part of
ISO 12614 is also applicable to other LNG-fueled motor vehicles (for example ships) as far as appropriate,
until any specific norm would be worked out for such a type of vehicle. It also provides general design
principles, and specifies requirements for instructions and marking.
This part of ISO 12614 is not applicable to the following:
a) fuel containers;
b) stationary gas engines;
c) container mounting hardware;
d) electronic fuel management;
e) refueling 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 12614 and tested according to the appropriate functional tests.
NOTE 2 All references to pressure in this part of ISO 12614 are to be considered gauge pressures unless
otherwise specified.
NOTE 3 This part of ISO 12614 is based upon a working pressure for natural gas as fuel of 1,6 MPa (16 bar).
2
(1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm .) 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, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 188:2011, Rubber, vulcanized or thermoplastic — Accelerated ageing and heat resistance tests
ISO 12614-1:2014, Road vehicles — Liquefied natural gas (LNG) fuel system components — Part 1: General
requirements and definitions
ISO 15500-2:2012, Road vehicles — Compressed natural gas (CNG) fuel system components — Part 2:
Performance and general test methods
3 Terms and definitions
For the purposes of this document, the terms and definitions in ISO 12614-1 apply.
© ISO 2014 – All rights reserved 1
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ISO 12614-2:2014(E)
4 General
4.1 Unless stated otherwise, the tests specified herein shall be conducted at room temperature, i.e.
20 °C ± 5 °C.
4.2 Components shall comply with the tests outlined in ISO 12614-3 and subsequent parts of ISO 12614
and any other applicable tests specified in this part of ISO 12614. Because of the peculiarities of some
components, the list of tests described in this part of the ISO 12614 from Clause 5 to 15 is not exhaustive.
If additional tests are required, their requirements are provided in the respective part of ISO 12614.
4.3 Unless otherwise specified, all tests shall be conducted using dry air or nitrogen. Qualified
personnel can also test with natural gas providing that appropriate safety measures are fulfilled. The
dewpoint of the test gas at the test pressure shall be at the temperature which ensures no icing, hydrate,
or liquid formation. For testing at low temperatures, liquid nitrogen will be used, which will be specifically
mentioned at the respective parts of the norm.
4.4 It is recognized that new technology might not be covered in ISO 12614-3 and subsequent parts of
ISO 12614.
5 Hydrostatic strength
A component shall not rupture when subjected to the following test method.
Outlet opening of the component shall be plugged. Valves or internal blocks shall be ensured in the open
position. The hydrostatic pressure specified for each component in ISO 12614 and subsequent parts
shall be applied with a test fluid to the inlet of the component for a period of at least 3 min.
Test samples shall not be used for any other testing.
6 Leakage
Prior to conditioning, the devices shall be purged with nitrogen and then sealed at 30 % of working
pressure using nitrogen, dry air, or natural gas.
All tests shall be conducted while the devices are continuously exposed to the specified test temperatures.
3
The device
...
DRAFT INTERNATIONAL STANDARD ISO/DIS 12614-2
ISO/TC 22/SC 25 Secretariat: CUNA
Voting begins on Voting terminates on
2013-01-16 2013-04-16
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ ORGANISATION INTERNATIONALE DE NORMALISATION
Road vehicles — Liquefied natural gas (LNG) fuel system
components —
Part 2:
Performance and general test methods
Véhicules routiers — Équipements pour véhicules utilisant le gaz naturel liquéfié (GNL) comme
combustible —
Partie 2: Performances et méthodes d'essai générales
ICS 43.060.40
To expedite distribution, this document is circulated as received from the committee
secretariat. ISO Central Secretariat work of editing and text composition will be undertaken at
publication stage.
Pour accélérer la distribution, le présent document est distribué tel qu'il est parvenu du
secrétariat du comité. Le travail de rédaction et de composition de texte sera effectué au
Secrétariat central de l'ISO au stade de publication.
THIS DOCUMENT IS A DRAFT CIRCULATED FOR COMMENT AND APPROVAL. IT IS THEREFORE SUBJECT TO CHANGE AND MAY NOT BE
REFERRED TO AS AN INTERNATIONAL STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS BEING ACCEPTABLE FOR INDUSTRIAL, TECHNOLOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME
STANDARDS TO WHICH REFERENCE MAY BE MADE IN NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT, WITH THEIR COMMENTS, NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPORTING DOCUMENTATION.
© International Organization for Standardization, 2013
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ISO/DIS 12614-2
Copyright notice
This ISO document is a Draft International Standard and is copyright-protected by ISO. Except as permitted
under the applicable laws of the user’s country, neither this ISO draft nor any extract from it may be
reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic,
photocopying, recording or otherwise, without prior written permission being secured.
Requests for permission to reproduce should be addressed to either ISO at the address below or ISO’s
member body in the country of the requester.
ISO copyright office
Case postale 56 CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Reproduction may be subject to royalty payments or a licensing agreement.
Violators may be prosecuted.
ii © ISO 2013 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/DIS 12614-2
Contents Page
Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 General . 2
5 Hydrostatic strength . 2
6 Leakage . 2
7 Excess torque resistance . 3
8 Bending moment . 3
9 Continued operation . 4
10 Corrosion resistance . 5
11 Oxygen ageing . 6
12 Electrical over voltages . 6
13 Non-metallic material immersion . 6
14 Vibration resistance . 6
15 Brass material compatibility . 6
© ISO 2012 – All rights reserved iii
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ISO/DIS 12614-2
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 12614-2 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 25,
Vehicles using gaseous fuels.
ISO 12614 consists of the following parts, under the general title Road vehicles — Liquefied natural gas (LNG)
fuel system components:
— Part 1: General requirements and definitions
— Part 2: Performance and general test methods
— Part 3: Check valve
— Part 4: Manual valve
— Part 5: Tank pressure gauge
— Part 6: Overpressure regulator
— Part 7: Pressure relief valve
— Part 8: Excess flow valve
— Part 9: Gas-tight housing and ventilation hose
— Part 10: Rigid fuel line in stainless steel
— Part 11: Fittings
— Part 12: Rigid fuel line in copper and its alloys
— Part 13: Pressure control regulator
— Part 14: Differential pressure fuel content gauge
iv © ISO 2012 – All rights reserved
---------------------- Page: 4 ----------------------
ISO/DIS 12614-2
— Part 15: Capacitance fuel content gauge
— Part 16: Heat exchanger – vaporizer
— Part 17: Natural gas detector
— Part 18: Gas temperature sensor
It is recognised that miscellaneous components specifically covered herein can be examined to meet the
criteria of this standard and tested in accordance to the appropriate functional tests.
© ISO 2012 – All rights reserved v
---------------------- Page: 5 ----------------------
DRAFT INTERNATIONAL STANDARD ISO/DIS 12614-2
Road vehicles — Liquefied natural gas (LNG) fuel system
components — Part 2: Performance and general test methods
1 Scope
This part of ISO 12614 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. This part of ISO 12614
is also applicable to other LNG fueled motor vehicles (for example ships) as far as appropriate, until any
specific norm would be worked out for such a type of vehicle. It also provides general design principles, and
specifies requirements for instructions and marking.
This part of ISO 12614 is applicable to vehicles using natural gas in accordance with ISO 15403 (mono-fuel,
bi-fuel or dual-fuel applications). It is not applicable to the following:
a) fuel containers;
b) stationary gas engines;
c) container mounting hardware;
d) electronic fuel management;
e) refueling 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 12614 and tested according to the appropriate functional tests
NOTE 2 All references to pressure in this part of ISO 12614 are to be considered gauge pressures unless
otherwise specified.
NOTE 3 This part of ISO 12614 is based upon a maximum working pressure for natural gas as fuel of 1,6
1)
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 normative documents contain provisions which, through reference in this text, constitute
provisions of this part of ISO 12614. For dated references, subsequent amendments to, or revisions of, any of
these publications do not apply. However, parties to agreements based on this part of ISO 12614 are
encouraged to investigate the possibility of applying the most recent editions of the normative documents
indicated below. For undated references, the latest edition of the normative document referred to applies.
1bar=0,1MPa=105Pa;1MPa=1N/mm2
1)
© ISO 2012 – All rights reserved
1
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ISO/DIS 12614-2
Members of ISO and IEC maintain registers of currently valid International Standards.
ISO 188:1998, Rubber, vulcanized or thermoplastic - Accelerated ageing and heat resistance tests.
ISO 3833:1977, Road vehicles — Types — Terms and definitions.
ISO 9227: 1990, Corrosion tests in artificial atmospheres - Salt spray tests.
3 Terms and definitions
The terms and definitions specified in Part 1 of this Standard shall apply.
4 General
4.1 Unless stated otherwise, the tests specified herein shall be conducted at room temperature i.e. 20°C ±
5°C.
4.2 Components shall comply with the tests outlined in Part 3 and subsequent parts of this Standard and any
other applicable tests specified in this standard. Because of the peculiarities of some components, the list of
tests described in this Part of the Standard from clause 5 to 15 is not exhaustive. If additional tests are
required their requirements are provided in the respective Part of the Standard.
4.3 Unless otherwise specified, all tests shall be conducted using dry air or nitrogen. Qualified personnel can
also test with natural gas providing that appropriate safety measures are fulfilled. The dewpoint of the test gas
at the test pressure shall be at the temperature which ensures no icing, hydrate or liquid formation. For testing
at low temperatures, liquid nitrogen will be used, which will be specifically mentioned at the respective parts of
the norm.
4.4 It is recognized that new technology may not be covered in Part 3 and subsequent parts of this Standard.
5 Hydrostatic strength
A component shall not rupture when subjected to the following test method.
Outlet opening of the component shall be plugged. Valves or internal blocks shall be assured in the open
position. The hydrostatic pressure specified for each component in Part 3 and subsequent parts shall be
ap
...
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