ISO 22760-2:2019

INTERNATIONAL ISO
STANDARD 22760-2
First edition
2019-12
Road vehicles — Dimethyl Ether
(DME) fuel system components —
Part 2:
Performance and general test methods
Véhicules routiers — Composants des systèmes de combustible
Diméthyle Ether (DME) —
Partie 2: Performances et méthodes d'essai générales
Reference number
©
ISO 2019
© ISO 2019
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Published in Switzerland
ii © ISO 2019 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General . 2
5 Hydrostatic strength . 2
5.1 General . 2
6 Leakage. 3
6.1 General . 3
6.2 External leakage . 3
6.3 Internal leakage . 3
6.4 Test conditions . 3
7 Excess torque resistance . 4
8 Bending moment . 4
9 Continued operation. 5
9.1 General . 5
9.2 Test methods . 5
9.2.1 Test procedure . 5
9.2.2 Room temperature cycling . 6
9.2.3 High-temperature cycling . 6
9.2.4 Low-temperature cycling . 6
10 Corrosion resistance . 6
11 Oxygen ageing . 7
12 Ozone ageing . 7
13 Electrical overvoltages . 7
14 Non-metallic material immersion . 7
15 Vibration resistance . 8
16 Brass material compatibility . 9
17 Insulation resistance . 9
18 Resistance to dry heat . 9
19 Creep .10
20 Temperature cycle test .10
21 Compatibility with heat exchange fluids of non-metallic parts .10
22 Automotive fluid exposure .10
22.1 General .10
22.2 Test method .10
22.3 Fluids .10
22.4 Pass criteria .11
Bibliography .12
Foreword
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Specific aspects for gaseous fuels.
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iv © ISO 2019 – All rights reserved

Introduction
For the purposes of this document, all fuel system components in contact with Dimethyl Ether have
been considered suitable for Dimethyl Ether as defined in ISO 16861. However, it is recognized that
miscellaneous components not specifically covered herein can be examined to meet the criteria of this
document and can be tested in accordance with the appropriate functional tests.
All references to pressure in this document are considered to be gauge pressures unless otherwise
specified.
This document is based on a service pressure for Dimethyl Ether used as fuel of 1 500 kPa (15 bar)
settled at 20 °C. Other service pressures can be accommodated by adjusting the pressure by the
appropriate factor (ratio).
INTERNATIONAL STANDARD ISO 22760-2:2019(E)
Road vehicles — Dimethyl Ether (DME) fuel system
components —
Part 2:
Performance and general test methods
1 Scope
This document specifies performance and general test methods for Dimethyl Ether (DME) fuel system
components intended for use on the types of motor vehicles defined in ISO 3833.
This document is applicable to vehicles (mono-fuel, bi-fuel or dual-fuel applications) using Dimethyl
Ether in accordance with ISO 16861 and ASTM D7901. It is not applicable to the following:
a) fuel containers;
b) stationary gas engines;
c) container-mounting hardware;
d) electronic fuel management;
e) refuelling receptacles.
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 188, Rubber, vulcanized or thermoplastic — Accelerated ageing and heat resistance tests
ISO 1431-1, Rubber, vulcanized or thermoplastic — Resistance to ozone cracking — Part 1: Static and
dynamic strain testing
ISO 1817, Rubber, vulcanized or thermoplastic — Determination of the effect of liquids
ISO 9227, Corrosion tests in artificial atmospheres — Salt spray tests
ISO 22760-1:2019, Road vehicles — Dimethyl Ether (DME) fuel system components — Part 1: General
requirements and definitions
ASTM D4814, Standard Specification for Automotive Spark-Ignition Engine Fuel
IEC 68-2-52, Kb: Salt Spray Fog Test
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 22760-1 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
— IEC Electropedia: available at http:// www .electropedia .org/
...