GB 18296-2019 PDF English
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| GB 18296-2019 | English | 145 |
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Safety Property Requirements and Test Methods for Automobile Fuel Tank and Its Installation
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| GB 18296-2001 | English | 70 |
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Safety property requirements and test methods for automobile fuel tank
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GB 18296-2019: Safety Property Requirements and Test Methods for Automobile Fuel Tank and Its Installation
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB18296-2019
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.060.40
T 16
Replacing GB 18296-2001
Safety Property Requirements and Test Methods
for Automobile Fuel Tank and Its Installation
Issued on. DECEMBER 17, 2019
Implemented on. JULY 01, 2020
Issued by. State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative References... 5
3 Terms and Definitions... 5
4 Safety Property Requirements... 6
4.1 Fuel tank... 6
4.2 Installation of the fuel tank... 8
5 Test Methods... 9
5.1 Pressure-proof test of metal fuel tank... 9
5.2 Flip test... 9
5.3 Impact resistance test at low temperature of plastic fuel tank... 10
5.4 Pressure-proof test of plastic fuel tank... 10
5.5 Fuel permeability test of plastic fuel tank... 11
5.6 Fuel resistance test of the plastic fuel tank... 11
5.7 Fire resistance test of plastic fuel tank... 11
5.8 High-temperature resistance test of plastic fuel tank... 13
5.9 Vibration durability test of metal fuel tank... 13
6 Implementation of Standard... 13
Appendix A (Normative) Size and Technical Requirements of Refractory Brick
... 14
Appendix B (Normative) Fire-Resistance Test... 15
Foreword
All technical contents in this Standard are mandatory.
This Standard was drafted as per the rules specified in GB/T 1.1-2009.
This Standard replaced GB 18296-2001 Safety Property Requirements and Test
Methods for Automobile Fuel Tank. Compared with GB 18296-2001, this Standard has
the major differences as follows.
--- Modify the standard name into Safety Property Requirements and Test Methods
for Automobile Fuel Tank and Its Installation.
--- Modify the scope of application of the standard from “this Standard specifies the
safety property requirements and test methods for automobile fuel tank with
gasoline and diesel as the fuel” to “this Standard specifies the safety property
requirements and test methods for automobile fuel tank filled with liquid fuel; and
the safety requirements for installation on the automobile”; meanwhile, add the
application of the Class-O automobile (see Clause 1 of this Edition; Clause 1 of
2001 Edition);
--- Add the requirements and test methods for fuel tank overturn test (see 4.1.7, 5.2
of this Edition);
--- Add fuel permeability requirements and test methods for plastic fuel tank (see
4.1.10, 5.5 of this Edition);
--- Add fuel resistance requirements and test methods of plastic fuel tank (see 4.1.11,
5.6 of this Edition);
--- Modify the fire resistance test method of the plastic fuel tank (see 4.1.12 of this
Edition; 3.10 of 2001 Edition);
--- Add the safety requirements for fuel tank installation (see 4.2 of this Edition);
--- Delete the technical requirements and test methods of plastic fuel tank vibration
(see 3.5, 4.3 of 2001 Edition);
--- Delete the requirements and test methods for the opening pressure of the safety
valve; introduce the automatic pressure compensation devices to balance the
pressure inside and outside the fuel tank (see 3.4, 4.2 of 2001 Edition).
The technical contents in this Standard refers to the Economic Commission for Europe
ECE R34 Uniform Regulations on the Certification of Fire Resistance of Vehicle (03
Revision, 2015 Edition)
This Standard was proposed by and under the jurisdiction of Ministry of Industry and
Information Technology.
Drafting organizations of this Standard. Dongfeng Motor Corporation Technical Center;
National Automobile Quality Supervision and Test Center (Xiangyang); YAPP
Automotive Parts Co., Ltd.; National Passenger Car Quality Supervision and
Inspection Center; Wanxiang Tongda Co., Ltd.; and Bengbu Tongda Auto Parts Co.,
Ltd.
Chief drafting staffs of this Standard. Ning Binhua, Fang Jing, Song Qinghua, Wang
Linglong, Xu Rui, Chen Yihu, Zhao Ning, Liu Liang, Liu Zhili, and Xu Yuanke.
The historical edition replaced by this Standard is as follows.
--- GB 18296-2001.
Safety Property Requirements and Test Methods
for Automobile Fuel Tank and Its Installation
1 Scope
This Standard specifies the safety performance requirements and test methods of
automobile fuel tank containing liquid fuel.
This Standard also specifies the safety requirements for the installation of automobile
fuel tank on the vehicles.
This Standard is applicable to the metal and plastic fuel tank of the Type-M, Type-N,
and Type-O automobiles.
2 Normative References
The following documents are essential to the application of 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) are applicable to this document.
GB 18352.6-2016 Limits and Measurement Methods for Emissions from Light-
Duty Vehicles (CHINA 6)
3 Terms and Definitions
For the purpose of this document, the following terms and definitions apply.
3.1 Automobile fuel tank
An independent tank assembly fixed on an automobile for storing fuel; is assembled
by a fuel tank, a filler pipe, a filler port, a fuel tank cover, a pipe joint, and other auxiliary
devices.
3.2 Capacity of the fuel tank
In the fuel tank design parameters, the fuel filling volume specified by the manufacturer.
3.3 Liquid fuel
The fuel that is liquid under normal temperature and pressure conditions.
3.4 Leakage of fuel
The fuel drops in a linear or drip form from the fuel tank.
3.5 Fuel permeability
The fuel is lost due to molecular diffusion in the fuel tank.
3.6 Automatic compensating pressure device
The device for automatically compensating the working pressure or safety pressure of
the fuel tank.
3.7 Working pressure of the fuel tank
The pressure above the liquid level in the fuel tank under normal automobile use
conditions.
4 Safety Property Requirements
4.1 Fuel tank
4.1.1 The fuel tank shall be resistant to corrosion.
4.1.2 The fuel tank shall be made of fire-resistant metal material, or it may be made of
plastic that meets the requirements of this Standard.
4.1.3 The fuel tank shall be equipped with automatic compensating pressure device
(such as vent valves, safety valves, etc.).
4.1.4 The fuel tank cover shall be able to fix onto the filler pipe. In the case of the fuel
tank cover is lost, if there are measures to prevent excessive evaporation of the fuel
and fuel overflow, then it is considered to meet the requirements of this Clause.
Specifically, the following methods can be used.
4.1.5 The seal between the fuel tank cover and the filter port shall be firm and reliable.
When locked, the fuel tank cover shall press the gasket onto the filler pipe tightly.
4.1.6 When the metal fuel tank is performed pressure-proof test according to 5.1, there
shall be no cracks or leakage; but the permanent deformation is allowed.
4.1.7 During the normal use of the vehicle, the fuel shall not overflow from the fuel tank
cover; neither overflow from the automatic compensating pressure device. When
performing the flip test according to 5.2, the fuel tank cover is allowed for the leakage
of the fuel; however, the leakage speed shall not exceed 30g/min; gasoline fuel tank
cover shall not have the leakage of the fuel.
4.1.8 When the plastic fuel tank is performed impact resistant test at low temperature
as per 5.3, there shall be no leakage of fuel.
4.2 Installation of the fuel tank
4.2.1 All parts of the fuel tank shall be properly protected by the vehicle body or frame
parts to prevent contact with obstacles on the ground. If the clearance BETWEEN the
vehicle body or frame parts installed in front of the fuel tank AND the ground is less
than the clearance BETWEEN fuel tank part AND the group, it can be regarded as a
protective measure.
4.2.2 The pipeline and other components of the fuel tank shall be installed in the vehicle
as securely as possible. Any torsion, bending, vibration of the vehicle structural parts
or driving parts shall not cause friction, crushing or any other abnormal stress on the
fuel tank parts.
4.2.8 There shall be a partition between the fuel tank and the passenger compartment.
The partition may have apertures (for instance for wiring harnesses); its arrangement
shall ensure that the fuel not flow from the fuel tank to the passenger compartment or
other compartment during the normal use.
4.2.9 The installation of the fuel tank shall be firm and reliable to ensure that the fuel
leaked from the fuel tank or its accessories flow to the ground during the normal use;
and shall not flow to the passenger compartment.
4.2.10 There shall be no protrusions, sharp edges, etc. near the fuel tank.
4.2.11 The fuel tank and its accessories shall be designed and installed to avoid any
fire caused by static electricity. For fuel tanks containing fuel with a flash point of 55°C
below, it is necessary to take discharge measures.
5 Test Methods
5.1 Pressure-proof test of metal fuel tank
The fuel tank shall be installed with all accessories under normal use. Fill the fuel tank
with a non-flammable liquid (for instance, water). Block all the ports of the fuel tank to
the outside; pressurize it slowly through the fuel pipe of fuel tank till it reaches twice
the working pressure; it shall be no less than 80kPa under any case; maintain the
pressure for 30s.
5.2 Flip test
5.2.1 Fix the fuel tank body and all its accessories including the automatic
compensating pressure device onto the test bench according to its installation method
on the vehicle.
5.2.2 The fuel tank shall rotate around an axis parallel to the longitudinal axis of the
vehicle.
5.2.3 The test shall be carried out for twice; once to fill the fuel tank with 90% of the
rated capacity of liquid for testing; once to fill the fuel tank with 30% of the rated
capacity of liquid for testing. The liquid for testing is the non-flammable liquid, its
viscosity and density are similar to that of the fuel under normal use (water can be
used).
5.2.4 Turn the fuel tank 90° to the right from its installation position; keep it in this
position for at least 5min. Then continue to rotate 90° in the above direction; keep it in
the fully flipped position for at least 5min. Return the fuel tank; discharge the liquid for
testing that failed to flow back to the fuel tank from the vent hole; add it if necessary.
Rotate the fuel tank 90° to the left in the opposite direction; keep it in this position for
at least 5min. Then continue to rotate 90° in this direction; keep it in the fully flipped
position for at least 5min.
Flipping speed. every 90° rotation angle, the rotation time shall be 1min~3min.
Check and record the leakage conditions of the fuel tank.
5.3 Impact resistance test at low temperature of plastic fuel tank
5.3.1 Fill the fuel tank with water and glycol mixed solution or non-corrosive low
freezing point solution to the rated capacity.
5.3.2 During the test, the temperature of the solution in the fuel tank shall be
maintained at -40 °C±2°C.
5.3.3 Use a pendulum test device for testing. The pendulum requirements are as
follows.
5.3.4 Select the vulnerable part on the fuel tank for testing. The vulnerable part refers
to the weaker part of the fuel tank that is exposed to the outside when the whole vehicle
is installed. The impact site selected before the test shall be marked; and indicated in
the test report.
5.3.5 During the test, the fuel tank shall be fixed by a fixing device on the side opposite
to the impacted surface of the fuel tank.
5.3.6 All impact tests can be performed on the same fuel tank; or individual impact test
can be performed on different fuel tanks.
Check and record the leakage of the fuel tank.
5.4 Pressure-proof test of plastic fuel tank
Fix the fuel tank on the test device in the simulation loading form; maintain an ambient
temperature at 53°C±2°C; add 53°C±2°C water to the fuel tank to reach the rated
capacity; cover the fuel tank cap; seal all the inlets and outlets. Then apply 2 times the
working pressure into the fuel tank, which shall be no less than 30kPa under any
circumstances; maintain the pressure for 5h.
5.5 Fuel permeability test of plastic fuel tank
5.5.1 The test oil s hall be the benchmark fuel specified in GB/T 18352.6-2016, or the
benchmark fuel for current automotive emission test. The fuel tank of the vehicle
equipped with compression-ignition engine shall use diesel; while the fuel tank of the
vehicle equipped with ignition engine shall use gasoline.
5.5.2 Pretreatment before test. inject test fuel into the fuel tank to reach 50% of the
rated capacity. The fuel tank is not sealed and stored in an environment with
temperature at 40°C±2°C till the amount of fuel loss per unit time reaches a stable
state, but no more than 4 weeks.
5.7 Fire resistance test of plastic fuel tank
5.7.1 Fuel tank installation and fuel type filling requirements.
5.7.2 Size requirements of oil tank. ensure that all edges of the fuel tank are exposed
to the flame; the length and width of the oil tank shall exceed the projection line of the
fuel tank on the horizontal plane by 200mm~500mm. The part of the oil tank side wall
exceeding the fuel level shall not exceed 80mm.
5.7.3 Refueling quantity of oil tank. the amount of fuel in the oil tank shall be sufficient
to ensure the test can be kept to the end under the free burning conditions.
5.7.5 Flame-resistant isolating cover for test. see Appendix A for refractory brick
structure and technical requirements. There shall be no gap between the refractory
bricks; and they shall be supported on the oil tank in the manner described below. the
holes on the refractory brick shall not be blocked.
5.7.6 Before starting the test, preheat the flame-retardant isolating cover to 35°C±5°C.
In order to maintain the same test conditions in each test, the refractory bricks can be
wetted. If it is tested outdoors, adequate windproof measure shall be taken; and the
wind speed above the fuel level of the oil tank shall not exceed 2.5km/h.
5.7.7 Three samples of a fuel tank are tested separately. The test process includes the
following four stages (see Appendix B for details).
5.8 High-temperature resistance test of plastic fuel tank
The fuel tank is fixed on the benched in the simulated loading mode; the ventilation
device is kept in the working state.
Check and record the leakage and deformation of the fuel tank.
5.9 Vibration durability test of metal fuel tank
The metal fuel tank is fixed on the vibration test bench in the simulated loading mode;
add 50% rated capacity of water to the fuel tank; cover the fuel tank cap; seal all inlets
and outlets; perform the vibration test as per the provisions of Table 1.
6 Implementation of Standard
6.1 For models that are newly applied for type approval, implementation shall begin
from the date of implementation of this Standard.
6.2 For models that have obtained type approval, implementation shall begin since the
13th month from the date of implementation of this Standard.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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