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Installation specification for gas system of gas vehicles
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GB 19239-2022: PDF in English
GB 19239-2022
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.020
CCS T 40
Replacing GB 19239-2013, GB/T 20734-2006
Installation Specification for Gas System of Gas Vehicles
ISSUED ON: AUGUST 31, 2022
IMPLEMENTED ON: JANUARY 1, 2023
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 Installation Requirements ... 6
5 Test Methods ... 10
6 Inspection Rules ... 14
7 Implementation Transition Period ... 15
Installation Specification for Gas System of Gas Vehicles
1 Scope
This document specifies the installation requirements, test methods, inspection rules and
implementation transition period of the gas system of gas vehicles.
This document is applicable to gas vehicles that can use compressed natural gas (hereinafter
referred to as CNG) / liquefied natural gas (hereinafter referred to as LNG) / liquefied petroleum
gas (hereinafter referred to as LPG) as fuel.
2 Normative References
The contents of the following documents constitute indispensable clauses of this document
through the normative references in this text. In terms of references with a specified date, only
versions with a specified date are applicable to this document. In terms of references without a
specified date, the latest version (including all the modifications) is applicable to this document.
GB 8410 Flammability of Automotive Interior Materials
GB/T 13005 Terminology of Gas Cylinders
GB/T 17676 Natural Gas Vehicle and Liquefied Petroleum Gas Vehicle - Identification Marks
GB/T 17895 Natural Gas Vehicle and Liquefied Petroleum Gas Vehicle - Vocabulary
GB/T 34510 Liquefied Natural Gas Cylinders for Vehicles
GB/T 36123-2018 Technical Requirements for Gas Leakage Alarm Device of Gas Vehicle
QC/T 245-2017 Technology Requirements of Fuel-gas System for CNG Vehicles
QC/T 247-2017 Technology Requirements of Fuel-gas System for LPG Vehicles
QC/T 755-2020 Technical Requirements of Fuel-gas System for LNG Vehicles
ISO 6487:2015 Road Vehicles - Measurement Techniques in Impact Tests - Instrumentation
3 Terms and Definitions
What is defined in GB/T 17895, GB/T 13005 and GB/T 34510, and the following terms and
definitions are applicable to this document.
3.1 Refueling Device
Refueling device refers to a component connected with the gas (liquid) refueling gun or gas
(liquid) returning gun when refueling gas (liquid).
4 Installation Requirements
4.1 General Requirements
4.1.1 The gas system for CNG vehicles shall satisfy the requirements of Chapter 4 in QC/T
245-2017. The gas system for LPG vehicles shall satisfy the requirements of Chapter 4 in QC/T
247-2017. The gas system for LNG vehicles shall satisfy the requirements of Chapter 5 in QC/T
755-2020.
4.1.2 The installation of the gas system of gas vehicles shall comply with the requirements of
the design documents of finished vehicles, and shall be assembled in accordance with the
product drawings and technical documents approved by the prescribed procedures.
4.1.3 The installation of the gas system of gas vehicles shall satisfy the requirements of the
strength and rigidity of the vehicle bearing parts and other relevant safety components.
Installation methods that may result in a reduction in the strength and rigidity of the vehicle
bearing parts shall not be adopted. The gas system shall not be used as a bearing part.
4.1.4 The gas vehicles shall be marked with signs in accordance with the stipulations of GB/T
17676 in a prominent position.
4.1.5 After installation, the gas system of gas vehicles shall satisfy the following requirements:
---the gas cylinder shall not be deformed or worn;
---all components shall have anti-loosening measures, and there shall be no loosening or
falling off;
---After the system is tested in accordance with the method specified in 5.1, there shall be
no leakage. When the LNG gas system is tested, the cold test shall be carried out first;
---The various components of the gas system shall not be installed within a range of 100
mm from heat sources, such as: exhaust pipe and exhaust after-treatment tank, etc.
When the distance between relevant components and heat sources is between 100 mm
and 200 mm, fixed and reliable heat insulation devices shall be set up.
4.2 Gas Cylinder
4.2.1 The gas cylinder shall be installed away from heat sources, and shall be effectively
separated from the driver’s cab or passenger compartment. When the gas cylinder cannot be
effectively separated from the driver’s cab or passenger compartment, sealing boxes (sealing
parts around the gas cylinder accessories), corrugated pipes and ventilation ports shall be used
to discharge the gas that may leak out of the vehicle. The exhaust direction of the ventilation
port shall be within the range of 45 cone with the ground. The distance from the ventilation
specified in 5.3.2, the relative displacement between the gas cylinder or gas cylinder
set and the fixed point of its fixing seat shall not be greater than 13 mm. Among them,
the single gas cylinder and the single gas cylinder fixing seat in the gas cylinder set
shall be tested in accordance with the method specified in 5.3.2.2; the installation of the
fixing seat for the vertical arrangement of the gas cylinder set shall be tested in
accordance with the method specified in 5.3.2.3. If the gas cylinder set is horizontally
arranged and multiple gas cylinders are fixed by one fastening belt, the installation of
the fixing seat shall be tested in accordance with the method specified in 5.3.2.4; if the
gas cylinder fastening belt only fixes one gas cylinder, it shall be tested in accordance
with the method specified in 5.3.2.2.
4.3 Refueling Device
4.3.1 The refueling device shall be installed with a dust cover and additional protective
measures. The protective measures include additional protective fences, partitions, protective
covers or the protective mechanism of the vehicle itself.
4.3.2 The refueling device shall be arranged at a position that is easy to operate and shall not
exceed the outline of the vehicle.
4.3.3 After the gas (liquid) refueling port is installed, there shall be no leakage after being
inspected in accordance with the test method specified in 5.4.
4.4 Piping
4.4.1 Rigid piping shall be neatly and reasonably arranged, and shall not interfere with adjacent
components. The fixed spacing shall not be greater than 600 mm. If the piping is in contact with
adjacent components, or passes through holes, protective measures shall be taken to ensure that
the piping is not worn. When two components are connected by rigid connection piping, it shall
be designed as an “O”, “S” or “U” shape, which can eliminate the effects of thermal expansion
and contraction, and vibration; the radius of curvature of the piping center shall not be less than
5 times the outer diameter of the piping.
4.4.2 Components that can generate relative displacement shall be connected by flexible piping,
and the others shall be connected by rigid piping. Flexible piping shall be fixed by resilient clips
before and after each bend. The fixed spacing of flexible piping shall be not greater than 300
mm; when fixing, vibration reduction and anti-wear measures shall be considered. The direction
of the piping shall be smooth, and there shall be no interference or discount.
4.4.3 The pipe joints shall not pass through or be installed in the driver’s cab and passenger
compartment, and shall not be installed in places with high heat sources, easy wear or impact;
the distance from the transmission shaft shall not be less than 100 mm.
4.4.4 The pipe joints shall be installed within the visible range or at a position that is easy for
the operator to operate. When disassembling the piping, release the pressure first, then
disassemble it. After reassembly, conduct an air-tight test in accordance with different working
pressures; the test method shall comply with the stipulations of 5.1.
4.4.5 When the distance between the liquid supply piping between the LNG cylinder and the
carburetor, and the wiring harness, water circuit, gas circuit, oil circuit and other components
that are not resistant to low temperature is less than 15 mm, temperature insulation measures
shall be taken.
4.4.6 The venting port of the LNG cylinder vent piping shall be located at the top or rear of the
vehicle, and a structure shall be set up to prevent rainwater and dust from entering and
accumulating. When the vent piping is installed at the rear of the vehicle, measures shall be
taken to prevent natural gas from entering or accumulating in the compartment or under the
vehicle. In addition, it shall also be separated from devices and components that are prone to
sparks, such as: exhaust pipes, batteries and relays of the vehicle.
4.5 Pressure, Temperature and Liquid Level Display Device
The pressure gauge shall be installed in a shock-proof place that is easy to observe and can
avoid damage. It shall be firmly installed and shall not be installed in the driver’s cab. When
installation is exposed on the outside of the vehicle, a protective cover shall be installed for the
pressure gauge. The devices for displaying pressure, temperature and liquid level signals in the
driver’s cab shall be arranged at positions that can be easily observed by the driver.
4.6 Manual Globe Valve
The manual globe valve shall be installed in a position that is easy to operate. The valve body
shall not be directly installed in the driver’s cab or in the passenger compartment.
4.7 Pressure Reducing Regulator (CNG), Carburetor (LNG) and Evaporating
Pressure Regulator (LPG)
When the pressure reducing regulator, carburetor and evaporating pressure regulator are heated
by the engine circulating water, their installation heights shall be lower than the top of the
engine radiator or the lowest water level of the expansion tank.
4.8 Fuel Switch
The fuel switch that performs the fuel switching function shall be installed at a position that is
convenient for the driver to operate. The gear marking of the fuel switch shall be obvious. After
installation, it shall be able to correctly control all the states.
4.9 Electrical System
4.9.1 The layout and direction of the wiring harness shall be reasonable, and well fixed. In
addition, it shall not rub against adjacent components. An overcurrent protection device shall
be installed in the line.
4.9.2 An electromagnetic shut-off valve shall be installed between the gas cylinder and the
engine. The installation position of the electromagnetic shut-off valve shall be far away from
electrical equipment, and the installation bracket shall not be in direct contact with the
During the test, a neutral foaming liquid shall be used; the foaming liquid shall be applied to
the entire surface of the detected part, and observed for at least 1 min; there shall be no air
bubbles in the detected area. After the test, the foaming liquid on the detected part shall be
cleaned.
5.1.5 Detection with leak detector
5.1.5.1 Before the detection, remove the residual oil or sealant from the detected part. During
the detection, the wind speed shall be less than 3 m/s.
5.1.5.2 An explosion-proof digital display detection instrument with an accuracy of not lower
than 5%Fs and an alarm point of 0.025‰ shall be used to detect the connections of each port,
and there shall be no leakage alarm. The detection time shall not be less than the reaction time
of the explosion-proof instrument.
5.2 Air-tight Test with Air-tight Box
Bring the compressed air into any orifice of the test piece and seal the other orifices. The gas
pressure is 0.01 MPa. Check in accordance with the method specified in 5.1.4.
5.3 Cylinder Installation Strength Test
5.3.1 Dynamic test
5.3.1.1 In accordance with the size and structure of the entire body or part of the body with the
gas cylinder installed (hereinafter referred to as the test piece) and the actual installation mode
of the original vehicle, fix the test piece on the test bench. The installation method shall not
increase the installation strength of the gas cylinder.
5.3.1.2 The test shall be carried out in accordance with the following methods:
a) Fill the gas cylinder or gas cylinder set with water or nitrogen equivalent to the rated
filling mass. Alternatively, the test tooling of the mass of the gas cylinder plus the
rated filling mass can also be used as replacement;
b) The acceleration of the test device shall be measured in accordance with the CFC60
frequency level characteristics in ISO 6487:2015;
c) The acceleration shall be maintained for at least 30 ms in accordance with the
stipulations of 5.3.1.3.
5.3.1.3 The requirements for the acceleration of Category-M1, Category-M2, Category-M3,
Category-N1, Category-N2 and Category-N3 vehicles are as follows.
a) Category-M1 and Category-N1 vehicles shall withstand:
---longitudinal acceleration of 20g forward;
---longitudinal acceleration of 20g backward;
---lateral acceleration of 8g in both directions;
---if the gas cylinder is installed on the side or under the frame, or under the floor of
the vehicle body, then, the acceleration in the vertical downward direction is 5g.
b) Category-M2 and Category-N2 vehicles shall withstand:
---longitudinal acceleration of 10g forward;
---longitudinal acceleration of 10g backward;
---lateral acceleration of 5g in both directions;
---if the gas cylinder is installed on the side or under the frame, or under the floor of
the vehicle body, then, the acceleration in the vertical downward direction is 5g.
c) Category-M3 and Category-N3 vehicles shall withstand:
---longitudinal acceleration of 6.6g forward;
---longitudinal acceleration of 6.6g backward;
---lateral acceleration of 5g in both directions;
---if the gas cylinder is installed on the side or under the frame, or under the floor of
the vehicle body, then, the acceleration in the vertical downward direction is 5g.
5.3.2 Static test
5.3.2.1 Requirements for test device
5.3.2.1.1 The test device shall have a facility to effectively control the force application.
Meanwhile, the height of the horizontal force applying mechanism in the vertical direction shall
be steplessly adjustable.
5.3.2.1.2 The test device shall be suitable for different vehicle models and different installation
forms of various gas cylinders.
5.3.2.1.3 The test device shall be able to record and automatically display the force and
displacement data, and can automatically draw the “force-displacement” relation curve.
5.3.2.1.4 The force application process shall be gentle and without impact.
5.3.2.1.5 The gas cylinder can be replaced by a tooling gas cylinder with the same outer
diameter as the gas cylinder, so as to ensure that the gas cylinder will not be deformed when
force is applied.
5.3.2.2 Test method of single gas cylinder
5.3.2.2.1 In accordance with the size and structure of the test piece and the actual installation
mode of the original vehicle, fix the test piece on the test device. The installation method shall
not increase the installation strength of the gas cylinder.
5.3.2.2.2 Adjust the force applying mechanism, so that the force applying point passes through
the center of the gas cylinder. The direction of force application is respectively the forward
direction, the vertical upward direction, and the left or right direction of the vehicle. The applied
force is 8 times the mass of the gas cylinder after it is full.
5.3.2.2.3 Apply a force to the test piece: when it reaches the set value, automatically stop the
force application, and record the force and displacement data in real time; draw the “force-
displacement” relation curve.
5.3.2.3 Test method of vertically arranged gas cylinder set
5.3.2.3.1 In accordance with the size and structure of the test piece and the actual installation
mode of the original vehicle, and the measurement requirements of the forward direction of the
vehicle, fix the test piece on the test piece. The installation method shall not increase the
installation strength of the fixing seat of the gas cylinder set, and shall ensure that the test piece
is firmly fixed.
5.3.2.3.2 The force applying point shall be on the fixing seat of the gas cylinder set. The
direction of force application is the forward direction of the vehicle, and passes through the
center of gravity of the gas cylinder set. The applied force is 8 times the mass of the gas cylinder
after it is full.
5.3.2.3.3 When carrying out the test of the fixing seat of the gas cylinder set, in order to prevent
deformation of the force-bearing part of the fixing seat, an additional reinforcing plate can be
added to the force-applying part.
5.3.2.3.4 Adjust the force applying mechanism; in accordance with the stipulations of 5.3.2.3.2,
apply a force to the fixing seat of the gas cylinder set. When reaching the set value,
automatically stop the force application, and record the force and displacement data in real time;
draw the “force-displacement” relation curve.
5.3.2.4 Test method of horizontally arranged gas cylinder set
5.3.2.4.1 In accordance with the size and structure of the test piece and the actual installation
mode of the original vehicle, fix the test piece on the test bench. The installation method shall
not increase the installation strength of the fixing seat of the gas cylinder set, and shall ensure
that the test piece is firmly fixed.
5.3.2.4.2 The force applying point shall be at the end of each gas cylinder; the direction of force
application shall be the axial direction of each gas cylinder; the applied force is 8 times the
mass of the gas cylinder after it is full.
......
| Standard ID | GB 19239-2022 (GB19239-2022) | | Description (Translated English) | Installation specification for gas system of gas vehicles | | Sector / Industry | National Standard | | Classification of Chinese Standard | T40 | | Classification of International Standard | 43.020 | | Word Count Estimation | 12,137 | | Date of Issue | 2022-08-31 | | Date of Implementation | 2023-01-01 | | Older Standard (superseded by this standard) | GB 19239-2013, GB/T 20734-2006 | | Administrative Organization | Ministry of Industry and Information Technology of the People's Republic of China | | Proposing organization | Ministry of Industry and Information Technology of the People's Republic of China | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration |
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