ISO 12614-7:2014

INTERNATIONAL ISO
STANDARD 12614-7
First edition
2014-07-01
Road vehicles — Liquefied natural gas
(LNG) fuel system components —
Part 7:
Pressure relief valve
Véhicules routiers — Équipements pour véhicules utilisant le gaz
naturel liquéfié (GNL) comme combustible —
Partie 7: Soupape de sécurité à la pression
Reference number
©
ISO 2014
© ISO 2014
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Published in Switzerland
ii © ISO 2014 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Marking . 2
5 Construction and assembly . 2
6 Test . 2
6.1 Applicability . 2
6.2 Hydrostatic strength . 3
6.3 Leakage . 3
6.4 Continued operation . 3
6.5 Operational test . 3
Foreword
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electrotechnical standardization.
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described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
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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: 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 material other than stainless steel
— Part 13: Pressure control regulator
— Part 14: Differential pressure fuel content gauge
— Part 15: Capacitance fuel content gauge
iv © ISO 2014 – All rights reserved

— Part 16: Heat exchanger - vaporizer
— Part 17: Natural gas detector
— Part 18: Gas temperature sensor
...