ISO/TS 21104:2019
(Main)Road vehicles — Liquefied natural gas (LNG) integrated low pressure refuelling and venting connector — 1,8 MPa connector
Road vehicles — Liquefied natural gas (LNG) integrated low pressure refuelling and venting connector — 1,8 MPa connector
This document specifies liquefied natural gas (LNG) refuelling nozzles and receptacles constructed entirely of new and unused parts and materials for road vehicles powered by LNG. An LNG refuelling connector consists of, as applicable, the receptacle and the nozzle. This document is applicable only to such devices designed for a working pressure of 1,8 MPa to those using LNG as vehicle fuel and having standardized mating components. NOTE All references to pressures in this document are considered gauge pressures, unless otherwise specified.
Véhicules routiers - Connecteur de ravitaillement et de ventilation basse pression intégré pour gaz naturel liquéfié (GNL) - Connecteur 1,8 MPa
General Information
Standards Content (Sample)
TECHNICAL ISO/TS
SPECIFICATION 21104
First edition
2019-10
Road vehicles — Liquefied natural
gas (LNG) integrated low pressure
refuelling and venting connector —
1,8 MPa connector
Reference number
ISO/TS 21104:2019(E)
©
ISO 2019
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ISO/TS 21104:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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ii © ISO 2019 – All rights reserved
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ISO/TS 21104:2019(E)
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General construction requirements . 3
4.1 Design . 3
4.1.1 Spillage . 3
4.1.2 Positive locking device . 3
4.1.3 Design cycle life . 3
4.2 Pressure rating . 3
4.3 Working temperature . 3
4.4 Materials . 3
4.4.1 Corrosion protection . 4
4.4.2 Material of the bodies of the receptacle and of the nozzle . 4
4.5 Operation . 4
4.6 Sealing exchange . 4
4.7 Installation . 4
5 Nozzles . 4
5.1 Venting depressurization . 4
5.2 Identification . 4
6 Standard receptacle dimensions . 4
7 Receptacle . 5
7.1 Cycle life . 5
7.2 Design . 5
7.3 Protective cap . 5
7.4 Mounting . 5
8 Instructions . 6
9 Marking . 6
9.1 Clarity . 6
9.2 Manufacturer and International Standard information . 6
9.3 Date of manufacture . 6
9.3.1 Additional marking . 6
10 Tests . 7
10.1 General requirements . 7
10.2 Test program . 7
10.3 User-interface . 7
10.3.1 Positive locking . 7
10.3.2 Safe disconnection . 8
10.3.3 Manual force in at T = + 20 °C +/-5 °C . 8
10.3.4 Manual force at high humidity . 8
10.4 Impact resistance of a nozzle. 8
10.5 Abnormal loads . 9
10.5.1 General. 9
10.5.2 Test in the unpressurized condition .10
10.5.3 Test in pressurized condition .10
10.6 Leak test .10
10.6.1 Hydrostatic pressure test .10
10.6.2 Leakage test . .11
10.7 Durability of the device (cycle life) .11
10.7.1 Concept of the test of a device .11
10.7.2 Cycle definition .11
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ISO/TS 21104:2019(E)
10.7.3 Test series .12
10.7.4 Exchange of seal of the nozzle and/or receptacle .12
10.8 Electrical conductivity .12
10.9 Corrosion resistance .12
10.10 Non-Destructive Examination (NDE) .12
Bibliography .14
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ISO/TS 21104:2019(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 of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 22, Road Vehicles, Subcommittee SC 41,
Specific aspects for gaseous fuels.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
© ISO 2019 – All rights reserved v
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TECHNICAL SPECIFICATION ISO/TS 21104:2019(E)
Road vehicles — Liquefied natural gas (LNG) integrated
low pressure refuelling and venting connector — 1,8 MPa
connector
1 Scope
This document specifies liquefied natural gas (LNG) refuelling nozzles and receptacles constructed
entirely of new and unused parts and materials for road vehicles powered by LNG.
An LNG refuelling connector consists of, as applicable, the receptacle and the nozzle. This document
is applicable only to such devices designed for a working pressure of 1,8 MPa to those using LNG as
vehicle fuel and having standardized mating components.
NOTE All references to pressures in this document are considered gauge pressures, unless otherwise
specified.
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 15500-2, Road vehicles — Compressed natural gas (CNG) fuel system components — Part 2:
Performance and general test methods
ISO 19723 (all parts), Road vehicles — Liquefied natural gas (LNG) fuel systems
3 Terms and definitions
For the purposes of this document, the following terms and definitions 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/
3.1
check valve
part of the receptacle, or of the nozzle, mounted inside which prevents return flow or venting of fuel
after the nozzle was disconnected from the receptacle
3.2
cycle life
number of refuelling cycles, as specified in this document, which the component can withstand without
leak or without another fail of function
3.3
device
nozzle or receptacle
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ISO/TS 21104:2019(E)
3.4
dry air
air with moisture content such that the dew point of the air at the required test pressure is at least
11 °C below the ambient test temperature
3.5
liquefied natural gas
LNG
cryogenic liquid produced by reducing the temperature of natural gas to about −162 °C at atmospheric
pressure (depending on LNG composition)
3.6
LNG refuelling connector
joined assembly of LNG refuelling nozzle (3.7) and LNG refuelling receptacle (3.8) for refuelling and
venting via one channel
3.7
LNG refuelling nozzle
device (3.3) which permits quick connection and disconnection of fuel supply hose to the LNG receptacle
in a safe manner
3.8
LNG refuelling receptacle
device (3.3) connected to a vehicle or storage system which receives the LNG refuelling nozzle (3.7) and
permits safe transfer of fuel
3.9
maximum service pressure
maximum pressure of the fuel delivered by the fuelling station
3.10
working pressure
maximum allowable pressure
maximum pressure that an LNG refuelling connector (3.6) can be expected to withstand in actual service
3.11
hydrostatic pressure
pressure to which a component is taken to verify the structural strength of the component
3.12
high humidity weather conditions
weather condition with 95 % to 100 % relative humidity at T = + 20 °C
3.13
poppet
movable closing part of the check valve (3.1)
3.14
positive locking device
feature which requires actuation of an interlocking mechanism to allow connection/disconnection of
the nozzle from the receptacle
3.15
vapour spillage space
dead volume in the LNG refuelling connector between the nozzle and the receptacle measured with
trapped water
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ISO/TS 21104:2019(E)
3.16
non-sparking materials
materials that do not contain, by mass, more than: 7,5 % in total of magnesium, titanium and zirconium
Note 1 to entry: According to IEC EN 60079-0:2011 Clause 8.3 for EPL Gb.
4 General construction requirements
4.1 Design
LNG nozzles and receptacles shall be:
— designed to minimize the possibility of incorrect
...
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