GB/T 43399-2023 English PDF (GBT43399-2023)

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GB/T 43399-2023: Road vehicles -- Liquefied natural gas (LNG) refuelling connector -- 3.1MPa connector
GB/T 43399-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.020
CCS T 40
Road Vehicles – Liquefied Natural Gas (LNG) Refueling
Connector – 3.1MPa Connector
(ISO 12617:2015, MOD)
ISSUED ON: NOVEMBER 27, 2023
IMPLEMENTED ON: MARCH 1, 2024
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Terms and Definitions ... 5
4 General Structural Requirements ... 7
5 Refueling Nozzle ... 9
6 Standard Size of Refueling Receptacle ... 9
7 Refueling Receptacle ... 10
8 Instructions for Use ... 11
9 Markings ... 11
10 Test Methods ... 13
Bibliography ... 19
Foreword
This Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for
Standardization – Part 1: Rules for the Structure and Drafting of Standardizing Documents.
This Document modified and adopted ISO 12617:2015 Road Vehicles – Liquefied Natural Gas
(LNG) Refueling Connector – 3.1MPa Connector.
Compared with ISO 12617:2015, this Document made the following structural adjustments:
--- 3.3, 3.4~3.8, 3.9~3.13 correspond to 3.4, 3.6~3.10, 3.12~3.16 in ISO 12617:2015;
--- Add the numbers of 4.1~4.3;
--- 7.3 corresponds to 7.3 and 10.4 in ISO 12617:2015;
--- 9.2~9.4 corresponds to 9.2~9.5 in ISO 12617:2015; and add the numbers of 9.2.1~9.2.3;
---10.4~10.10 corresponds to 10.5~10.11 in ISO 12617:2015; and add the numbers of
10.9.1~10.9.4.
The technical differences and the causes between this Document and ISO 12617:2015 are as
follows:
--- Replace ISO 14469 (see 10.10) with normatively quoted GB/T 43408 to comply with
China’s technical situation;
--- Delete 3.3 in ISO 12617:2015, which is likely to cause confusion. Delete 3.5 in ISO
12617:2015, the hydrostatic strength is clearly specified and explained in this Document,
and there is no need to define it. Delete the second half of the NOTE of 3.7 in ISO
12617:2015, there shall be no requirements in NOTE. Delete the NOTE of 3.9 in ISO
12617:2015, which is already confirmed in 3.1. Delete 3.11 in ISO 12617:2015, and it
only appears once in the document;
--- Delete the prerequisite for international certification in 4.1 of ISO 12617:2015, and
international certification cannot be carried out through this Document. Delete the
operator training requirements in 4.1c) of ISO 12617:2015, which comply with national
requirements, and there are clear regulatory requirements for operators. Delete the filling
port shall be installed outside the engine compartment in 4.8 of ISO 12617:2015, and
there shall be no installation requirements in the product technical requirements standard;
--- Delete that the filling port should not be installed in areas where the temperature exceeds
85 ℃ in 7.5 of ISO12617:2015; and there shall be no installation requirements in the
product technical requirements standard;
--- Change 9.3 and 9.4 in ISO 12617:2015; merge 9.3 and 9.4; and do not produce
Road Vehicles – Liquefied Natural Gas (LNG) Refueling
Connector – 3.1MPa Connector
1 Scope
This Document specifies the general construction requirements, refueling nozzle, refueling
receptacle, instructions for use, markings and test methods for new and unused 3.1MPa
connectors for road vehicle liquefied natural gas (LNG) filling connectors.
This Document applies to connectors with a working pressure of 3.4MPa.
NOTE: Unless otherwise specified, pressures in MPa mentioned in this Document are considered gauge
pressures.
2 Normative References
The provisions in following documents become the essential provisions of this Document
through reference in this Document. For the dated documents, only the versions with the dates
indicated are applicable to this Document; for the undated documents, only the latest version
(including all the amendments) is applicable to this Document.
GB/T 43408 Road vehicles - Compressed natural gas (CNG) refueling connector (GB/T
43408-2023, ISO 14469:2017, MOD)
ISO 15500-2 Road vehicles – Compressed natural gas (CNG) fuel system components –
Part 2: Performance and general test methods
3 Terms and Definitions
For the purposes of this Document, the following terms and definitions apply.
3.1 Check valve
A component installed inside the refueling receptacle or refueling gun to prevent fuel backflow
or discharge after the refueling nozzle is disconnected from the refueling receptacle.
3.2 Cycle life
The number of refueling that can be withstood by the components without leakage or other
malfunctions.
3.3 Dry air
Air with a dew point temperature at the test pressure that is at least 11°C lower than the ambient
test temperature.
3.4 Liquefied natural gas (LNG)
A colorless, cryogenic liquid fluid that is composed primarily of methane and may contain small
amounts of ethane, propane, butane, nitrogen, or other components commonly found in natural
gas.
[SOURCE: GB/T 8423.3-2018, 2.1.14]
3.5 Refueling connector; LNG refueling connector
The connecting assembly of the LNG refueling nozzle (3.6) and the LNG refueling receptacle
(3.7).
NOTE: There are check valves (3.1) in the refueling nozzle and the refueling receptacle that can be
opened mechanically by mutual operation.
3.6 Refueling nozzle; LNG refueling nozzle
The component that is safely and quickly connecting and disconnecting the fuel supply from
the LNG refueling receptacle (3.7).
3.7 Refueling receptacle; LNG refueling receptacle
The component that is installed on the vehicle to connect to the LNG storage system and dock
with the LNG refueling nozzle (3.6) for safe fuel transferring.
3.8 Maximum service pressure
The maximum pressure that the refueling station provides the fuel.
3.9 Poppet
The moving part within the check valve (3.1) that has the function of closing and opening the
valve body.
3.10 Positive locking means
Measures that are required to activate the interlocking mechanism to achieve safe connection
or disconnection of the refueling nozzle (3.6) and the refueling receptable (3.7).
--- Under normal handling and use conditions, the product structure can maintain normal
operation;
--- vapor spillage space is less than 25cm3.
4.4 Pressure level
4.4.1 Working pressure (maximum allowable pressure)
The working pressure of the connector is 3.4MPa.
4.4.2 Maximum service pressure
The maximum service pressure of the connector is 3.1MPa.
4.4.3 Hydrostatic strength
The hydrostatic strength test pressure of components is 2.5 times the working pressure.
4.4.4 Working temperature
4.4.4.1 The working temperature range of the refueling receptacle is -196℃~85℃.
4.4.4.2 The refueling nozzle shall be able to deliver fuel at -196°C and can operate normally
within the ambient temperature range of -40°C to 85°C.
4.5 Materials
4.5.1 Corrosion resistance
Corrosion-resistant materials shall be used (see 10.9). Different metals shall be protected
against electrochemical corrosion before they can be used in contact.
4.5.2 LNG refueling nozzle and LNG refueling receptacle
The materials of the LNG refueling nozzle and the LNG refueling receptacle shall be
compatible with LNG within the working pressure and temperature range; and the manufacturer
shall declare the compliance of its materials in the documents delivered with the product.
4.5.3 Body materials of refueling nozzle and refueling receptacle
The body mat...