ISO 14469-1:2004

Road vehicles — Compressed natural gas (CNG) refuelling connector — Part 1: 20 MPa (200 bar) connector

ISO 14469-1:2004 specifies CNG refuelling nozzles and receptacles constructed entirely of new and unused parts and materials, for road vehicles powered by compressed natural gas. A CNG refuelling connector consists of, as applicable, the receptacle and its protective cap (mounted on the vehicle) and the nozzle. ISO 14469-1:2004 is applicable only to such devices designed for a service pressure of 20 MPa (200 bar), identified by the code B200, to those using CNG in accordance with ISO 15403 and having standardized mating components, and to connectors that prevent natural gas vehicles from being fuelled by dispenser stations with service pressures higher than that of the vehicle, while allowing them to be fuelled by stations with service pressures less than or equal to the vehicle fuel system service pressure.

Véhicules routiers — Connecteur de remplissage en gaz naturel comprimé (GNC) — Partie 1: Connecteur 20 MPa (200 bar)

General Information

• Status: Withdrawn
• Publication Date: 02-Nov-2004
• Withdrawal Date: 02-Nov-2004
• ICS: 43.060.40 - Fuel systems
• Technical Committee: ISO/TC 22/SC 41 - Specific aspects for gaseous fuels
• Drafting Committee: ISO/TC 22/SC 41/WG 3 - Fuel system components and refuelling connector for vehicles propelled by gaseous fuel
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 03-Jan-2017

Relations

• Revised: ISO 14469:2017 - Road vehicles — Compressed natural gas (CNG) refuelling connector
• Effective Date: 19-Oct-2013

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 14469-1
First edition
2004-11-01


Road vehicles — Compressed natural
gas (CNG) refuelling connector —
Part 1:
20 MPa (200 bar) connector
Véhicules routiers — Connecteur de remplissage en gaz naturel
comprimé (GNC) —
Partie 1: Connecteur 20 MPa (200 bar)





Reference number
ISO 14469-1:2004(E)
©
ISO 2004

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ISO 14469-1:2004(E)
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ISO 14469-1:2004(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope. 1
2 Normative references . 1
3 Terms and definitions. 1
4 General construction requirements . 2
5 Nozzles. 3
6 Standard receptacle dimensions. 4
7 Receptacles . 5
8 Instructions. 5
9 Marking. 6
10 Tests. 6
Annex A (informative) Nozzle characteristics. 20
Annex B (informative) Manufacturing and production test plan . 21
Annex C (normative) Receptacle test fixture. 22

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ISO 14469-1:2004(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.
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 14469-1 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 25, Road
vehicles using natural gas.
ISO 14469 consists of the following parts, under the general title Road vehicles — Compressed natural gas
(CNG) refuelling connector:
 Part 1: 20 MPa (200 bar) connector
Size 2 and 25 MPa (250 bar) connectors will form the subjects of future parts 2 and 3.
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ISO 14469-1:2004(E)
Introduction
This part of ISO 14469 was developed to use in the examination, testing and certification of newly produced
compressed natural (CNG) gas vehicle fuelling nozzles and receptacles and, as such, applies only to the
nozzles and receptacles used in CNG fuelling systems, and not to the system itself.
A nozzle certified to this part of ISO 14469 will be functionally compatible from a safety and performance
perspective with all listed receptacles of compatible profile and system pressure. Similarly, a certified
receptacle will be functionally compatible from a safety and performance perspective with all listed nozzles of
compatible profile and system pressure.
As there may eventually be many different kinds of nozzles and receptacles available from a variety of
manufacturers which, for safety reasons, must all be compatible with one another, this part of ISO 14469
specifies a series of receptacle profiles. These standard profiles incorporate the design specifications (mating
materials, geometry and tolerances) which may be considered in the certification of a submitted nozzle or
receptacle. This part of ISO 14469 refers only to one working pressure and one application. Other working
pressures and applications are under consideration for the future.
The construction and performance of nozzles and receptacles are based on the observation that three main
parameters affect user safety and system compatibility.
a) Working pressure
All nozzles and receptacles are designed to have a working pressure of 25 MPa (250 bar).
b) Design life
Frequency of use is the second parameter to be considered. Since frequency of use will differ with the
nozzle/receptacle application (i.e. public sector, fleet employee and residential), all receptacles will be
tested at 10 000 connect/disconnect cycles for compliance with this part of ISO 14469. In addition, all
nozzles will be tested according to the following frequency use classifications, as applicable:
1) Class A Nozzle, specifying high frequency use, with a cycle life of 100 000 cycles and equating to
approximately 100 fills per day for three years;
2) Class B Nozzle, specifying medium frequency use, with a cycle life of 20 000 cycles and equating to
approximately 10 fills per day for five years.
c) Training
Operator training required is in accordance with national requirements.

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INTERNATIONAL STANDARD ISO 14469-1:2004(E)

Road vehicles — Compressed natural gas (CNG) refuelling
connector —
Part 1:
20 MPa (200 bar) connector
1 Scope
This part of ISO 14469 specifies CNG refuelling nozzles and receptacles constructed entirely of new and
unused parts and materials, for road vehicles powered by compressed natural gas. A CNG refuelling
connector consists of, as applicable, the receptacle and its protective cap (mounted on the vehicle) and the
nozzle. This part of ISO 14469 is applicable only to such devices designed for a service pressure of 20 MPa
(200 bar), identified by the code B200, to those using CNG in accordance with ISO 15403 and having
standardized mating components, and to connectors that prevent natural gas vehicles from being fuelled by
dispenser stations with service pressures higher than that of the vehicle, while allowing them to be fuelled by
stations with service pressures less than or equal to the vehicle fuel system service pressure.
5 2
NOTE All references to pressures, given in megapascals and bar (1 bar = 0,1 MPa = 10 Pa; 1 MPa = 1 N/mm ) are
to be considered gauge pressures, unless otherwise specified.
2 Normative references
The following referenced documents are indispensable for the application 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 188:1982, Rubber, vulcanized — Accelerated ageing or heat-resistance tests
ISO 1817:1985, Rubber, vulcanized — Determination of the effect of liquids
ISO 9227:1990, Corrosion tests in artificial atmospheres — Salt spray tests
ISO 15403, Natural gas — Designation of the quality of natural gas for use as a compressed fuel for vehicles
ISO 15501-1, Road vehicles — Compressed natural gas (CNG) fuel systems — Part 1: Safety requirements
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
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
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ISO 14469-1:2004(E)
3.2
hydrostatic pressure
pressure to which a component is taken to verify the structural strength of the component
3.3
working pressure
maximum pressure that a CNG refuelling connector can be expected to withstand in actual service
3.4
service pressure
settled pressure of 20 MPa (200 bar) at a uniform gas temperature of 15 °C
3.5
positive locking means
feature which requires actuation of an interlocking mechanism to allow connection/disconnection of the nozzle
from the receptacle
3.6
CNG refuelling nozzle
device which permits quick connection and disconnection of fuel supply hose to the CNG receptacle in a safe
manner
3.7
CNG refuelling receptacle
receptacle
device connected to a vehicle or storage system which receives the CNG refuelling nozzle and permits safe
transfer of fuel
3.8
CNG refuelling connector
connector
joined assembly of CNG refuelling nozzle and receptacle
4 General construction requirements
4.1 CNG refuelling nozzles (hereafter referred to as CNG nozzles) and receptacles (hereinafter both also
referred to as devices) manufactured in accordance with this part of ISO 14469 shall be designed in
accordance with reasonable concepts of safety, durability and maintainability.
4.2 CNG nozzles and receptacles shall be well fitted and manufactured in accordance with good
engineering practice. All construction requirements may be met by either the construction specified in this part
of ISO 14469 or another construction that gives at least equivalent performance.
4.3 CNG nozzles and receptacles shall be
 designed to minimize the possibility of incorrect assembly,
 designed to be secure against displacement, distortion, warping or other damage, and
 constructed to maintain operational integrity under normal and reasonable conditions of handling and
usage.
4.4 CNG nozzles and receptacles shall be manufactured of materials suitable and compatible for use with
CNG at the pressure and the temperature ranges to which they will be subjected (see Clause 1).
The minimum temperature range shall be selected by the manufacturer between the following ranges:
−40 °C to 85 °C
−20 °C to 120 °C
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ISO 14469-1:2004(E)
4.5 CNG nozzles and receptacles constructed of brass shall use brass alloys with a copper mass content
u 70 %. This will ensure proper material compatibility with all the constituents of natural gas.
4.6 Separate external three-way valves shall be constructed and marked so as to indicate clearly the open,
shut and vent positions.
4.7 CNG nozzles and receptacles shall be operated either to connect or disconnect without the use of tools.
4.8 The receptacle shall be mounted on the vehicle in accordance with ISO 15501-1.
4.9 Jointing components shall provide gas-tight sealing performance.
5 Nozzles
5.1 Nozzles shall be one of the three types according to a), b) and c). See also Annex A.
a) Type 1 is a nozzle for use with dispensing hoses that remain fully pressurized at dispenser shutdown.
The nozzle shall not allow gas to flow until a positive connection has been achieved. The nozzle shall be
equipped with an integral valve or valves, incorporating an operating mechanism which first stops the
supply of gas and safely vents the trapped gas before allowing the disconnection of the nozzle from the
receptacle. The operating mechanism shall ensure that the vent valve is in the open position before the
release mechanism can be operated and that the gas located between the nozzle shut-off valve and the
receptacle check valve is safely vented prior to nozzle disconnection (see 10.2).
b) Type 2 is a nozzle for use with dispensing hoses that remain fully pressurized at dispenser shutdown. A
separate three-way valve connected directly, or indirectly, to the inlet of the nozzle is required to safely
vent trapped gas prior to nozzle disconnection. The nozzle shall not permit the flow of gas if unconnected.
Venting is required prior to disconnection of the nozzle (see 10.2).
c) Type 3 is a nozzle for use with dispensing hoses which are automatically depressurized — 0,5 MPa
(5 bar) and below — at dispenser shutdown (see 10.2).
In addition, nozzles shall be classified in terms of cycle life as follows:
 Class A, specifying high frequency use, with a cycle life of 100 000;
 Class B, specifying low frequency use, with a cycle life of 20 000.
5.2 Venting or de-pressurization of all nozzle types is required prior to disconnection. Disconnection of all
nozzles shall be able to be accomplished in accordance with 10.2.
5.3 The method for attaching the nozzle to the fuel dispensing system hose shall not rely on the joint
threads between the male and female threads for sealing (e.g. conical threads).
5.4 The three-way valve exhaust port of Type 1 and Type 2 nozzles shall be protected from the ingress of
foreign particles and fluid which would hamper the operation of the valve.
5.5 The portions of a nozzle which are held by the user for connection or disconnection may be thermally
insulated.
5.6 A Type 1 nozzle shall bear a marking in accordance with Clause 9, if necessary indicating the direction
of the open and shut operation of the actuating mechanism.
5.7 The interface surface of the nozzle shall be constructed of material having a hardness > 75 Rockwell B
(HRB 75) and shall be non-sparking and conductive (see 10.11.5 and 10.15).
The exposed surfaces of the nozzles shall be made of non-sparking materials (see 10.11.5 and 10.15).
5.8 Nozzles shall comply with the performance requirements of Clause 10 to ensure interchangeability.
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ISO 14469-1:2004(E)
6 Standard receptacle dimensions
A receptacle shall comply with the design specifications shown in Figure 1.
Dimensions in millimetres
Surface roughness u Ra 3,2 µm

Key
This area shall be kept free of all components.
1 Sealing surface equivalent to No. 110 O-ring of dimensions:
9,19 mm ± 0,127 mm ID
2,62 mm ± 0,076 mm width
Sealing surface finish: 0,8 µm to 0,05 µm
Material hardness: 75 Rockwell B (HRB 75) minimum
a
Minimum length of the receptacle which is clear of provisions for attachment of receptacle or protective caps.
Figure 1 — B200 receptacle
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ISO 14469-1:2004(E)
7 Receptacles
7.1 Receptacles shall comply with Clauses 1 to 10 and shall be evaluated using at least two different test
nozzles, each nozzle representing a different locking technology.
The failure of any test conducted with the receptacle and nozzle test samples shall constitute a failure of the
submitted receptacle, unless the manufacturer can prove the problem was caused by the test nozzle.
7.2 Receptacle designs which employ means, on the back diameter as shown in Figure 1, to accommodate
mounting, or for mounting accessories or marking purposes, shall not have such means extend beyond the
back diameter dimensions of the profile as specified by Figure 1, as applicable. Acceptable means include
wrench flats, dust cap anchoring grooves, use of hex stock, undercutting for marking, and threads for
pressure-tight caps. Receptacle designs shall not compromise the interchangeability requirements specified in
Annex C.
7.3 The receptacle shall be equipped with an internal check valve to prevent the escape of gas. The check
valve shall be of the non-contact type, opening by differential pressure only.
7.4 The method for attaching the receptacle to the vehicle fuel system shall not rely on the joint between
the male and female threads for sealing, such as conical threads.
7.5 The interfacing surface of the receptacle shall be constructed of material having a hardness > 75
Rockwell B (HRB 75) and shall be non-sparking and conductive (see 10.11.5 and 10.15).
The exposed surfaces of devices shall be made of non-sparking materials (see 10.11.5).
7.6 Receptacles shall have a means to prevent the ingress of fluids and foreign matter.
7.7 The function specified in 7.6 may also be met by either a protective cap (see 10.4) or a pressure-tight
protective cap (see 10.16).
7.8 The receptacle shall have provisions to be firmly attached to the vehicle and shall comply with
applicable abnormal load tests (see 10.7).
7.9 The receptacle shall not be installed in an area in which the temperature exceeds 85 °C.
7.10 Receptacles shall have a cycle life of > 10 000 cycles.
8 Instructions
8.1 Information required under this clause for instructions and provisions to be specified shall be given in an
easily understood form.
8.2 Special tools required for connection of receptacles to tubing and assembly and disassembly of
three-way valve parts shall be clearly identified in the instructions.
8.3 The manufacturers of receptacles, nozzles and three-way valves shall provide clear and concise printed
instructions and diagrams in a form that can be easily understood and adequate for
a) proper field assembly,
b) installation,
c) maintenance,
d) replacement of components as appropriate,
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ISO 14469-1:2004(E)
e) safe operation by all users,
f) suitability and use, and
g) storage and handling.
9 Marking
9.1 Information required under this clause to be marked shall be in an easily understood form. Marking
should be embossed, cast, stamped or otherwise formed in the part. This includes markings baked into an
enamelled surface.
9.2 Nozzles and receptacles shall bear the following information:
a) manufacturer's or dealer's name, trademark or symbol;
b) model designation;
c) B200;
d) applicable type and class (see 5.1).
9.3 Nozzles and receptacles shall each bear a date code marking.
The four-digit date code marking shall consist of at least four adjacent digits determined as follows.
a) The first and second digits shall indicate the calendar year in which the nozzle, receptacle or three-way
valve was manufactured (e.g. 96 for 1996, 00 for 2000).
b) The third and fourth digits shall indicate the week in which the nozzle, receptacle or three-way valve was
manufactured (e.g. 03 for the third week of the year). For the purpose of this marking, a week shall begin
at 00:01 h on Sunday and end at 24:00 h on Saturday.
A date code may be used for more than one week. However, it shall not be used for more than four
consecutive weeks, or for more than two weeks into the next calendar year.
When a four-digit date code is not practical, the manufacturer shall submit a plan acceptable to the certifying
agency which will outline means of establishing the date of manufacture so that it is traceable to the purchaser.
Additional numbers, letters or symbols may follow the four digit number specified in a) and b). If additional
numbers are used, they shall be separated from the date code.
9.4 Marking to identify this part of ISO 14469 shall be provided for each system. This marking may be
located on the package or on a notice placed inside the package in which the device is shipped.
10 Tests
10.1 General requirements
The nozzle and receptacle tested shall be of the receptacle and nozzle designs specified in Clauses 1 to 9.
Unless otherwise stated,
a) tests shall be conducted at room temperature (20 ± 5) °C,
b) all pressure or leak tests shall be conducted with dry air or dry nitrogen, and
c) devices shall be conditioned to attain equilibrium conditions.
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ISO 14469-1:2004(E)
Type 2 nozzles shall be tested in series, with either a three-way valve or some other means to independently
pressurize and vent the nozzle. The three-way valve shall not affect the temperature, durability or flow
characteristics of the nozzle. Failure of the three-way valve shall not constitute failure of the nozzle. A
three-way valve supplied for utilization with a Type 2 nozzle shall be evaluated separately.
Nozzle tests shall be done with the test fixtures, specified in Annex C, as applicable. A new receptacle test
sample shall be used for each nozzle test. The failure of any test conducted with the nozzle and receptacle
test sample shall constitute a failure of the nozzle design.
10.2 User interface
The appearance of the nozzle and receptacle shall be such as to clearly suggest the proper method of use.
It shall not be possible to deliver gas using Type 1 nozzles unless the nozzle and receptacle are connected
properly and positively locked.
Upon disconnection, Type 1, 2 and 3 nozzles shall stop the flow of gas. No hazardous condition shall result
from disconnection. Type 3 nozzles shall be under a pressure of 0,7 MPa (7 bar) during this test.
When the contained pressure is less than or equal to 0,7 MPa (7 bar), all nozzles shall be capable of being
disconnected with forces or torques not exceeding 225 N or 7 N⋅m.
The disconnection force/torque shall be applied in a direction that tends to unhook and release the nozzle.
The force/torque shall be applied to the unhooking/release actuator. The torque shall be applied through axis
rotation of the nozzle handle equal to the exterior handling surface of the nozzle uncoupling mechanism and in
a direction such that the nozzle tends to unhook and be released.
On depressurized devices, the axial force to connect and lock or unlock and disconnect the device shall be
u 90 N.
On a positive locking device that incorporates a rotary locking means, the torque to lock or unlock the locking
means shall not exceed 1 N⋅m for a device having a diameter of u 25,4 mm or smaller and 1,7 N⋅m for a
device having a diameter > 25,4 mm.
The minimum force to facilitate disconnection at pressures of 6,25 MPa (62,5 bar) or more, shall be 2,5 times
the force when depressurized (Types 1 and 2) or 0,7 MPa (7 bar) (Type 3). Type 1 nozzles shall be tested
with the vent port plugged.
10.3 Impact resistance
A nozzle shall be connected to a 4,6 m length of 9,5 mm internal diameter (ID) refuelling hose, conditioned at
−40 °C for 24 h and then dropped 1,8 m onto a concrete floor as shown in Figure 2. The nozzle shall be
dropped ten times, then pressurized to 20 MPa (200 bar) and subjected to ten additional drops. Following this,
the nozzle shall be capable of normal connection and disconnection to the receptacle. In addition, the nozzle
shall comply with all leakage tests specified in this part of ISO 14469 (see 10.5).
10.4 Receptacle protective caps
There shall be no permanent distortion or damage to any receptacle protective cap when tested as follows.
A solid steel ball with a diameter 50 mm shall be dropped from a height of 300 mm striking the protective cap
installed on the receptacle. The test shall be conducted at −40 °C and at 85 °C at a minimum of five points of
impact most likely to cause damage to the receptacle and the protective cap.
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ISO 14469-1:2004(E)
Dimensions in metres

Key
1 suitable support
2 refuelling hose (9,5 mm diameter)
3 nozzle
4 concrete floor
Figure 2 — Impact resistance test arrangement
10.5 Leakage at room temperature
10.5.1 Nozzle
A nozzle, whether coupled or uncoupled, shall be either bubble-free for 1 min during the leak test or have a
3
leak rate of < 20 cm /h (normalized), when tested as follows.
Tests shall be conducted at 0,5 MPa (5 bar), 30 MPa (300 bar) and then again at 0,5 MPa (5 bar).
Pressurized air or nitrogen shall be applied to the inlet of the coupled (or uncoupled) device. The external
body shall then be checked for bubble-tight leakage using immersion in room temperature water.
All connectors shall be checked for leakage from the time of connection, through full fuel flow, to the time of
disconnection.
If there are no bubbles for a period of 1 min, the sample passes the test. If bubbles are detected, then the leak
rate shall be measured by either a vacuum test using helium gas (global accumulation method) or an
equivalent method.
10.5.2 Receptacle
The receptacle check valve shall be either bubble-free for 1 min during the leak test or have a leak rate of
3
< 20 cm /h (normalized) when tested as follows.
Tests shall be conducted at 0,5 MPa (5 bar), 30 MPa (300 bar) and then again at 0,5 MPa (5 bar).
The receptacle shall be connected to a pressure vessel capable of safely accommodating the specified test
pressures. The receptacle and pressure vessel shall then be pressurized. Once the pressure vessel has
reached the specified test pressure, the upstream portion of the receptacle shall be quickly depressurized and
the receptacle check valve checked for leakage.
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ISO 14469-1:2004(E)
10.6 Valve operating handle
If a nozzle is equipped with a valve operating handle, it shall be capable of withstanding double the
manufacturer's specified operating torque or force, without damage to the operating handle or the operating
handle stops.
This test with the torque or force applied in both the opening and closing directions shall be performed
a) with the nozzle properly connected to a receptacle, and
b) with the nozzle intentionally misaligned relative to the receptacle.
10.7 Abnormal loads
10.7.1 General
The connected nozzle and receptacle shall be subjected to the following abnormal loads for a period of 5 min
in service. These tests are to be conducted separately:
a) pulls a along the longitudinal axis of the nozzle or receptacle;
b) moments b applied in a worst-case manner.
The nozzle and receptacle shall be able to withstand abnormal loads of a = 1 350 N and b = 120 N⋅m without
distortion or damage, and of a = 2 700 N and b = 240 N⋅m without becoming so damaged as to leak. The load
and moment arm shall be measured about a point 41 mm from the front of the receptacle to the hose inlet of
the nozzle (see Figure 3).
After completing these tests, the receptacle shall comply with 10.5.
Dimensions in millimetres

Key
1 receptacle
2 abnormal load reference
3 moment
4 nozzle
Figure 3 — Abnormal load test
10.7.2 Test in the unpressurized condition
The receptacle test fixture and nozzle shall not be pressurized during the abnormal load tests.
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ISO 14469-1:2004(E)
The receptacle shall be mounted as a cantilever to a supporting member in accordance with the
manufacturer's instructions. For the purposes of this test, the supporting member shall be capable of
withstanding the specified loads without displacement or deflection.
The loads applied and the device's ability to resist damage shall be as specified in 10.7. After completion of
the tests, the receptacle s
...