ISO 12614-13:2021
(Main)Road vehicles - Liquefied natural gas (LNG) fuel system components - Part 13: Tank pressure control regulator
Road vehicles - Liquefied natural gas (LNG) fuel system components - Part 13: Tank pressure control regulator
This document specifies tests and requirements for the tank pressure control regulator, 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. This document is based upon a working pressure for natural gas as a fuel of 1,6 MPa [16 bar1]. Other working pressures can be accommodated by adjusting the pressure by the appropriate factor (ratio). For example, 2 MPa (20 bar) working pressure system will require pressures to be multiplied by 1,25. 1 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2.
Véhicules routiers — Équipements pour véhicules utilisant le gaz naturel liquéfié (GNL) comme combustible — Partie 13: Régulateur de pression du réservoir
General Information
- Status
- Published
- Publication Date
- 03-Jun-2021
- Technical Committee
- ISO/TC 22/SC 41 - Specific aspects for gaseous fuels
- Current Stage
- 6060 - International Standard published
- Start Date
- 04-Jun-2021
- Due Date
- 08-Jan-2022
- Completion Date
- 04-Jun-2021
Relations
- Effective Date
- 23-Apr-2020
Overview
ISO 12614-13:2021 specifies tests and requirements for the tank pressure control regulator used in liquefied natural gas (LNG) fuel systems for road vehicles (as defined in ISO 3833). It forms part of the ISO 12614 series addressing LNG fuel system components and focuses on safety, durability and performance of the regulator under cryogenic and routine operating conditions. All pressures in the standard are gauge pressures unless otherwise stated.
Key topics and requirements
- Scope and exclusions: Applies to tank pressure control regulators for motor vehicles; not applicable to fuel containers, stationary gas engines, container mounting hardware, electronic fuel management or refuelling receptacles.
- Marking: Component must be traceable - manufacturer name/trademark, model/part number, working pressure or pressure/temperature range, serial number or date code. Additional recommended markings include flow direction, fuel type, electrical ratings, certification symbol and reference to ISO 12614-13.
- Construction and conformity: Regulators must comply with the general requirements in ISO 12614‑1 and test methods in ISO 12614‑2.
- Test program (selected highlights):
- Hydrostatic strength: test pressure = 2.5 × working pressure (WP).
- External leakage: leakage tests at prescribed temperature/pressure combinations:
- Cryogenic (< −162 °C): 1.0 × WP and 0.25 × WP.
- Room temperature (20 °C): 0.25 × WP and 1.5 × WP.
- Elevated temperature (85 °C or 120 °C): 0.25 × WP.
- Continued operation (durability): 7 000 cycles required. Cycles split 50% at room temperature and WP, 50% at < −162 °C and 100% WP. Each cycle: flow until stabilized outlet pressure, then shut off within 1 s, with stabilized defined as set pressure ±15% for ≥5 s. Lock‑up pressure after cycling must not exceed manufacturer’s specified lock‑up pressure.
- Pressure basis: Standard uses a base WP of 1.6 MPa (16 bar) for natural gas; test pressures can be scaled by ratio for other system WPs (e.g., multiply by 1.25 for 2.0 MPa systems).
Applications and users
- Who uses it: LNG vehicle OEMs, component manufacturers, test laboratories, certification bodies, fleet operators and safety/compliance engineers working with LNG-powered road vehicles.
- Practical value: Ensures regulator reliability under cryogenic and elevated temperatures, reduces leakage risk, provides durability criteria for long-term operation, and supports conformity assessment and type approval of LNG fuel system components.
Related standards
- ISO 12614-1 - General requirements and definitions for LNG fuel system components
- ISO 12614-2 - Performance and general test methods for LNG system components
- ISO 3833 - Road vehicles - Types - Terms and definitions
Keywords: ISO 12614-13, tank pressure control regulator, LNG fuel system, liquefied natural gas, road vehicles, hydrostatic strength, leakage testing, continued operation, working pressure.
Frequently Asked Questions
ISO 12614-13:2021 is a standard published by the International Organization for Standardization (ISO). Its full title is "Road vehicles - Liquefied natural gas (LNG) fuel system components - Part 13: Tank pressure control regulator". This standard covers: This document specifies tests and requirements for the tank pressure control regulator, 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. This document is based upon a working pressure for natural gas as a fuel of 1,6 MPa [16 bar1]. Other working pressures can be accommodated by adjusting the pressure by the appropriate factor (ratio). For example, 2 MPa (20 bar) working pressure system will require pressures to be multiplied by 1,25. 1 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2.
This document specifies tests and requirements for the tank pressure control regulator, 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. This document is based upon a working pressure for natural gas as a fuel of 1,6 MPa [16 bar1]. Other working pressures can be accommodated by adjusting the pressure by the appropriate factor (ratio). For example, 2 MPa (20 bar) working pressure system will require pressures to be multiplied by 1,25. 1 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2.
ISO 12614-13:2021 is classified under the following ICS (International Classification for Standards) categories: 43.060.40 - Fuel systems. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 12614-13:2021 has the following relationships with other standards: It is inter standard links to ISO 12614-13:2014. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ISO 12614-13:2021 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 12614-13
Second edition
2021-06
Road vehicles — Liquefied natural gas
(LNG) fuel system components —
Part 13:
Tank pressure control regulator
Véhicules routiers — Équipements pour véhicules utilisant le gaz
naturel liquéfié (GNL) comme combustible —
Partie 13: Régulateur de pression du réservoir
Reference number
©
ISO 2021
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
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Published in Switzerland
ii © ISO 2021 – 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 External leakage . 3
6.4 Continued operation . 3
Bibliography . 4
Foreword
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This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 41,
Specific aspects of gaseous fuels.
This second edition cancels and replaces the first edition (ISO 12614-13:2014), which has been
technically revised.
The main changes compared to the previous edition are as follows:
— editorial changes.
A list of all parts in the ISO 12614 series can be found on the ISO website.
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