ISO 12614-6:2014

DRAFT INTERNATIONAL STANDARD ISO/DIS 12614-6
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 6:
Overpressure regulator
Véhicules routiers — Équipements pour véhicules utilisant le gaz naturel liquéfié (GNL) comme
combustible —
Partie 6: Régulateur de surpression
ICS 43.060.40









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©  International Organization for Standardization, 2013

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ISO/DIS 12614-6

Copyright notice
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ii © ISO 2013 – All rights reserved

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ISO/DIS 12614-6

Contents Page
Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Marking . 2
5 Construction and assembly . 2
6 Test . 2
6.1 Applicability . 2
6.2 Hydrostatic strength . 3
6.3 External leakage . 3
6.4 Continued operation . 4

© ISO 2012 – All rights reserved iii

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ISO/DIS 12614-6

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 12614-6 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

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ISO/DIS 12614-6

— Part 15: Capacitance fuel content gauge
— Part 16: Heat exchanger – vaporizer
— Part 17: Natural gas detector
— Part 18: Gas temperature sensor

© ISO 2012 – All rights reserved v

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