GB/T 4502-2023_English: PDF (GB/T4502-2023)
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| Standard ID | GB/T 4502-2023 (GB/T4502-2023) | | Description (Translated English) | Laboratory test methods for passenger car tyres capabilities | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G41 | | Classification of International Standard | 83.160.10 | | Word Count Estimation | 19,198 | | Date of Issue | 2023-05-23 | | Date of Implementation | 2023-12-01 | | Older Standard (superseded by this standard) | GB/T 4502-2016 | | Drafting Organization | Wanli Tire Co., Ltd., Zhongce Rubber Group Co., Ltd., Shandong Linglong Tire Co., Ltd., Prinx Chengshan (Shandong) Tire Co., Ltd., Beijing Rubber Industry Research and Design Institute Co., Ltd., Triangle Tire Co., Ltd., Sichuan Tire Rubber Co., Ltd. (Group) Co., Ltd., Double Star Group Co., Ltd., Shandong Fengyuan Tire Manufacturing Co., Ltd., Sailun Group Co., Ltd., Xiamen Zhengxin Rubber Industry Co., Ltd., Qingdao Sentury Tire Co., Ltd., Shandong Xinghongyuan Tire Co., Ltd., Shandong Changfeng Tire Co., Ltd., Anhui Jiatong Passenger Radial Tire Co., Ltd., Pirelli Tire Co., Ltd., Dalian Goodyear Tire Co., Ltd., Continental Ma Brand Tire (China) Co., Ltd., Michelin (China) Investment Co., Ltd., Hankook Tire has | | Administrative Organization | National Standardization Technical Committee of Tire and Rim (SAC/TC 19) | | Proposing organization | China Petroleum and Chemical Industry Federation | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Management Committee | | Standard ID | GB/T 4502-2016 (GB/T4502-2016) | | Description (Translated English) | Laboratory test methods for passenger car tyres capabilities | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G41 | | Classification of International Standard | 83.160.10 | | Word Count Estimation | 18,117 | | Date of Issue | 1984-06-17 | | Date of Implementation | 2017-07-01 | | Drafting Organization | Guangzhou Rubber Industry Research and Design Institute, Xiamen Zhengxin Rubber Industry Co., Ltd., Sailun Jinyu Group Co., Ltd., China Rubber & Rubber Industry Co., Ltd., China Rubber Industry Group Co., Ltd., , Guangzhou Fenglin Rubber Tire Co., Ltd., Qingdao Senlin Kirin Tire Co., Ltd., Michelin (China) Investment Co., Ltd., Yiyou Tire Zhangjiagang Co., Ltd., Bridgestone (China) Co., Ltd., Fengshen Tire Co., ) Co., Ltd., Dalian Goodyear Tire Co., Ltd., Continental Ma Brand Tire (China) Co., Ltd., Tianjin Jiurong Wheel Technology Co., Ltd., Shantou Huanda Tire Testing Equipment Co., Ltd. | | Administrative Organization | National Tire Rim Standardization Technical Committee (SAC/TC 19) | | Regulation (derived from) | National Standard Notice No. 14 of 2016 | | Proposing organization | China Petroleum and Chemical Industry Federation | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China, Standardization Administration of the People Republic of China | | Standard ID | GB/T 4502-2009 (GB/T4502-2009) | | Description (Translated English) | Laboratory test methods for passenger car tyres capabilities | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G41 | | Classification of International Standard | 83.160.10 | | Word Count Estimation | 18,132 | | Date of Issue | 2009-04-24 | | Date of Implementation | 2009-12-01 | | Older Standard (superseded by this standard) | GB/T 4502-1998; GB/T 4503-2006; GB/T 4504-1998; GB/T 7034-1998 | | Quoted Standard | GB/T 2978; GB/T 6326; GB 9743 | | Adopted Standard | ISO 10191-1995, MOD | | Drafting Organization | Guangzhou South China Rubber Tire Co., Ltd. | | Administrative Organization | National Standardization Technical Committee tire rim | | Regulation (derived from) | National Standard Approval Announcement 2009 No.6 (Total No.146) | | Proposing organization | China Petroleum and Chemical Industry Association | | Issuing agency(ies) | Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China | | Summary | This standard specifies test methods for laboratory performance testing of car tires, including testing terms and definitions, test procedures, , test conditions, test equipment and precision criteria and test reports. In the proposed test method, the test method only requires the application of certain types of decisions based on the measured tire (with tube or tubeless, bias tires or radial tires, etc.). The criteria include: (1) unseating resistance test-to assess the resistance value of the tubeless tire bead from the rim. (2) Strength test-can evaluate the performance of the tire structure by detecting the tire tread damage. (3) high-speed performance test-in accordance with the tire speed symbol, the evaluation of the tire at high speed performance. (4) Durability Test-required by load and speed in the driving time, the evaluation of the tire. |
GB/T 4502-2023
GB
NATIONAL STANDARD OF THE
PEOPLE'S REPUBLIC OF CHINA
ICS 83.160.10
CCS G 41
Replacing GB/T 4502-2016
Laboratory test methods for passenger car tyres capabilities
(ISO 10191:2021, Passenger car tyres - Verifying tyre capabilities -
Laboratory test methods, MOD)
ISSUED ON: MAY 23, 2023
IMPLEMENTED ON: DECEMBER 1, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 7
2 Normative references ... 7
3 Terms and definitions ... 7
4 Test equipment and its precision ... 8
5 Test samples ... 9
6 Test methods ... 10
7 Judgment rules ... 18
8 Test report ... 19
Appendix A (Informative) Comparison list of structure numbers between this document
and ISO 10191:2021 ... 21
Appendix B (Informative) List of technical differences between this document and ISO
10191:2021 and their reasons ... 23
Appendix C (normative) Shape and dimensions of the pressing block for bead unseating
... 26
Reference ... 27
Laboratory test methods for passenger car tyres capabilities
1 Scope
This document describes the laboratory test methods for performance testing of
passenger car tyres, including test equipment and its precision, test conditions, test
procedures, judgment rules and test reports.
This document includes the bead unseating resistance test, strength performance test,
high-speed test, endurance test and low-pressure performance test for tyres. Of the test
methods proposed, only the applications of some test methods depend on the type of
tyre to be tested (tube or tubeless tyres, diagonal tyres or radial tyres, etc.).
The test methods listed in this document are not suitable for grading the performance
or quality level of tyre products.
This document is applicable to new passenger car pneumatic tyres and retreaded
passenger car pneumatic tyres. Other tyres can be tested with reference to this document
after consultation and agreement of relevant parties.
2 Normative references
The following documents contain the provisions which, through normative reference in
this document, constitute the essential provisions of this document. For the dated
referenced documents, only the versions with the indicated dates are applicable to this
document; for the undated referenced documents, only the latest version (including all
the amendments) is applicable to this document.
GB/T6326 Tyre terms and definitions (GB/T 6326-2014, ISO 4223-1:2002, NEQ)
GB/T 8170 Rules of rounding off for numerical values & expression and judgment
of limiting values
3 Terms and definitions
Terms and definitions defined in GB/T 6326 and the following apply to this document.
3.1 parasitic tread block chunking; PTBC
A defect characterized by rubber pieces separated from the tyre tread or tearing without
exposing the tyre reinforcing material (such as carcass ply, belt, etc.).
4.2 Strength testing machine
4.2.1 The testing machine shall be equipped with a sufficiently long cylindrical metal
indenter, and the end of the indenter is hemispherical with a diameter of 19 mm±0.5
mm.
4.2.2 The indenter device shall be able to apply force gradually and incrementally, and
the accuracy of the force and displacement indicator is ±1% of the full scale.
4.2.3 The accuracy of the displacement velocity of the indenter shall be ±3% of the full
scale.
4.3 High-speed and endurance testing machine
4.3.1 The drum diameter of the testing machine shall be 1700 mm±17 mm.
4.3.2 The surface of the test drum of the testing machine shall be a smooth steel surface,
and its width shall not be less than the total section width of the test tyre.
4.3.3 The loading capacity of the test loading device shall meet the requirements of the
test method, and its accuracy is ±1% of the full scale.
4.3.4 The speed capability of the test machine drum and test equipment shall meet the
requirements of the test method, and its accuracy shall be +2 0 km/h.
4.3.5 The radial runout of the drum of the testing machine shall not exceed 0.25 mm.
4.3.6 The ambient temperature measuring device shall be set within the range of 150
mm~1000 mm from the test tyre.
4.4 Inflation pressure gauge
The accuracy of the inflation pressure gauge is ±5 kPa.
5 Test samples
According to the needs of the test, the test samples are 3 to 5 identical tyres, which are
used for bead unseating resistance test and strength test, high-speed test, endurance test
and low-pressure performance test respectively. Therein,
-- for the bead unseating resistance test and the strength test, the same test sample
can be used, or different test samples can be used respectively;
-- for the second high-speed test of passenger car tyres whose maximum speed
exceeds 300 km/h as specified in 6.3.1.6, the same test sample can be used for
the first and second high-speed tests, or different test samples can be used
be noted in the test report that each test point is "not unseated" or "unseated"; if the
pressing block for bead unseating slipped or touched the rim, it shall be indicated.
6.2 Strength test
6.2.1 Test conditions and test preparation
6.2.1.1 The test rim should comply with the provisions of GB/T 2978 or relevant
industry technical documents on measuring rims.
NOTE: The relevant industry technical documents are only applicable to the specifications of passenger
car tyres that are not within the scope of GB/T 2978.
6.2.1.2 Install the test tyre on the test rim and inflate it to the pressure specified in Table
1.
6.2.1.3 The inflated test tyre and rim assembly shall be stood at an ambient temperature
of 18 °C to 36 °C for at least 3 hours. If the same set of tyre and rim assembly used for
the bead unseating resistance test is used, the test can be continued.
6.2.1.4 Determine 5 roughly equidistant test points along the outer circumferential
direction of the tyre, mark and number them one by one.
6.2.2 Test procedures
6.2.2.1 Readjust the pressure of the test tyre that has been stood for the indicated time
to the specified value in Table 1.
6.2.2.2 Fix the test tyre and rim assembly after correcting the pressure on the strength
testing machine, and conduct the test point by point.
6.2.2.3 The indenter shall be perpendicular to the tread, and press on the pattern block
as close as possible to the centerline of the tread circumference, while avoiding pressing
into the tread groove.
6.2.2.4 The indenter gradually and incrementally applies force (F) to the tyre crown at
a moving speed of 50 mm/min±2.5 mm/min until the tyre crown is pressed through or
the minimum breaking energy value specified in Table 9 is reached. Readjust the
pressure before moving on to the next test point.
6.2.2.5 Measure and record the force (F) and pressed depth (the travel is expressed as
p) at the moment when the indenter stops moving at each test point.
6.2.2.6 Where the indenter cannot continue moving due to contact with the rim and the
tyre has not been punctured, the test point shall be deemed to have passed the test, and
shall be indicated in the test report as "rim is touched and tyre isn't punctured".
tyre cool naturally for 15 minutes to 25 minutes, and measure the tyre pressure within
the specified time, and then check the appearance of the tyre without disassembly after
it has completely cooled.
6.5 Low-pressure performance test
6.5.1 Test conditions and test preparation
6.5.1.1 This test is only applicable to radial tyres (excluding T-type temporary-use spare
tyres), and it shall be carried out continuously after the end of the endurance test in 6.4.
The same set of tyre and rim assemblies that have passed the endurance test in 6.4 shall
be used, and it shall be adjusted to the specified test pressure:
-- For standard passenger car radial tyres, the test pressure is 140 kPa;
-- For reinforced passenger car radial tyres, the test pressure is 160 kPa.
6.5.1.2 After adjusting the pressure, the test tyre and rim assembly shall be stood at an
ambient temperature of 38 °C±3 °C for at least 2 hours.
6.5.1.3 The setting of test load, speed and time shall meet the following requirements:
-- Test load: It is 100% of the load capacity corresponding to the load index of the
test tyre, and the unit is kilogram (kg);
-- Test speed: 110 km/h for snow tyres, and 120 km/h for other passenger car radial
tyres;
-- Test time: 90 min.
6.5.1.4 The time for the test drum to start at uniform acceleration and reach the speed
specified in 6.5.1.3 shall be within 5 minutes.
6.5.1.5 During the whole test process, the ambient temperature shall be kept within the
range of 38 °C±3 °C.
6.5.2 Test procedures
6.5.2.1 Readjust the pressure of the test tyre that has been stood for the indicated time
to the specified value in 6.5.1.1.
6.5.2.2 Install the test tyre and rim assembly prepared according to 6.5.2.1 on the high-
speed and endurance testing machine, make it perpendicular to the surface of the test
drum and apply the load specified in 6.5.1.3.
6.5.2.3 Carry out the test according to the test conditions specified in 6.5.1.3. The whole
test process shall be carried out without interruption. The tyre shall not be artificially
After the test is completed according to the requirements of 6.3, if the following
conditions are met, the sample is judged as "pass the test"; otherwise, it is judged as
"fail the test":
The tyre pressure measured according to the requirements of 6.3.2.5 shall not be lower
than 95% of the initial pressure specified in Table 3; there shall be no obvious (tread,
sidewall, ply, inner line, belt or breaker, bead) separation, ply cracking, cords break,
cords separation, chunking, open splice, chap, and carcass abnormal deformation found
in the appearance inspection. Tyres with a maximum speed of 300 km/h and above may
have bulges on the tread surface or chunking caused by bulging.
7.4 Endurance performance
After the test is completed according to the requirements of 6.4, if the following
conditions are met, the sample is judged as "pass the test"; otherwise, it is judged as
"fail the test":
The tyre pressure measured according to the requirements of 6.4.2.4 shall not be lower
than 95% of the initial pressure specified in Table 1; there shall be no (tread, sidewall,
ply, belt or breaker, bead) separation, ply cracking, cords separation, cords break,
chunking (except PTBC of snow tyres), open splice, chap, and carcass abnormal
deformation found in the appearance inspection.
7.5 Low-pressure performance
After the test is completed according to the requirements of 6.5, if the following
conditions are met, the sample is judged as "pass the test"; otherwise, it is judged as
"fail the test":
The tyre pressure measured according to the requirements of 6.5.2.4 shall not be lower
than 95% of the initial pressure specified in 6.5.1.1; there shall be no (tread, sidewall,
ply, inner line, belt or breaker, bead) separation, ply cracking, cords separation, cords
break, chunking (except PTBC of snow tyres), open splice, chap, and carcass abnormal
deformation found in the appearance inspection.
8 Test report
The test report shall include the following content:
a) the manufacturer name, trademark, specification, and production number of
the test tyre;
b) the load index or ply rating, maximum load capacity, speed symbol, material,
and structure of the test tyre, etc.;
c) test rim specifications;
d) the laboratory ambient temperature;
e) the document number and test date;
f) the test pressure and test load;
g) the test time and test speed at each stage of the test;
h) the model of the pressing block and the horizontal distance value p for bead
unseating test;
i) the bead unseating resistance of each test point for bead unseating test;
j) the condition of each test point of the tyre for bead unseating test: "not
unseated", "unseated", or "slippage or the rim is touched";
k) the diameter of the indenter for strength test;
l) the indenter's force, travel, and breaking energy at each test point of the tyre
for strength test;
m) the condition of each test point of the tyre for strength test: "unpunctured",
"punctured", or "the rim is touched and the tyre isn't punctured";
n) the tyre appearance, tyre pressure, and other conditions after the high-speed,
endurance, or low-pressure tests;
o) records or descriptions of other accidents during the tests;
p) the conclusion: "pass the test" or "fail the test".
......
GB/T 4502-2016
GB
NATIONAL STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 83.160.10
G 41
Replacing GB/T 4502-2009
Laboratory test methods for
passenger car tyres capabilities
(ISO 10191.2010, Passenger car tyres - Verifying tyre capability
- Laboratory test methods, MOD)
ISSUED ON. AUGUST 29, 2016
IMPLEMENTED ON. JULY 1, 2017
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration Committee.
Table of Contents
Foreword ... 3
1 Scope ... 6
2 Normative references ... 6
3 Terms and definitions ... 7
4 Test equipment and precision ... 7
5 Test methods ... 9
6 Determination criterion ... 17
7 Test report ... 19
Annex A (Informative) Comparison between clause numbers of this Standard
and ISO 10191. 2010 ... 21
Annex B (Informative) Technical differences between this Standard and ISO
10191.2010 and causes for these differences ... 24
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB/T 4502-2009 Laboratory Test Methods for
Passenger Car Tyres Capabilities. Compared with GB/T 4502-2009, the main
technical changes are as follows.
- modified and added definitions of test drum speed and test speed (see
3.1, 3.2 of this Edition [Translator note. in the text, there is no 3.2; test
drum speed and test speed are all in 3.1], 3.1 of Edition 2009);
- modified requirements for accuracy of inflation pressure gauges which
was modified to “±5 kPa” (see 4.4 of this Edition, 4.4 of Edition 2009);
- modified the provisions for distance P from bead unseating block of which
P value shall be determined by requirements in Table 2 (see Table 2 of
this Edition, Table 2 of Edition 2009);
- added and modified relevant content of “Type C bead unseating block
shall be used for other tubeless passenger car tyres with rims of nominal
diameters ranging 10~19 and the aspect ratio less than or equal to 30.”
(see 5.1.1.6 of this Edition, 5.1.1.6 of Edition 2009);
- modified “Apply a force through the block to the tyre outer at a rate of 50
mm/min ± 2.5 mm/min, and increase the force until the bead block seats
or until the minimum bead unseating resistance prescribed in Table 7 is
reached” to “The bead unseating block shall apply to the tyre outer at a
rate of 50 mm/min ± 2.5 mm/min to increase the applied force until the
minimum bead unseating resistance specified in Table 8 is reached and
the final test point shall continue until it is unseating or contact with the
rim. Correct the air pressure before proceeding to the next point.” (see
5.1.2.4 of this Edition, 5.1.2.4 of Edition 2009);
- added requirements of “It should be noted if there is block slippage or
pressure to the rim” (see 5.1.2.5 of this Edition);
- added test conditions and test procedures in high speed test for
passenger car tyres with a maximum speed exceeding 300 km/h (see
5.3.1.7, 5.3.1.8, 5.3.2.4, Table 6 of this Edition);
- added special requirements for test speed of 110 km/h in snow tyre’s
endurance test, low-pressure performance test (see 5.4.1.6, 5.5.1.3 of this
Edition);
For easy use, this Standard also makes the following editorial modification.
- deleted Bibliography in the International standard.
This Standard was proposed by China Petroleum and Chemical Industry
Federation.
This Standard shall be under the jurisdiction of National Technical Committee
on Tyre and Rim of Standardization Administration of China (SAC/TC 19).
The drafting organizations of this Standard. Guangzhou South China Rubber
Tyre Co., Ltd., Triangle Tyre Co., Ltd., Zhongce Rubber Group Co., Ltd.,
Shandong Linglong Tyre Co., Ltd., Beijing Rubber Industry Research and
Design Institute, Xiamen Cheng Shin Rubber Ind. Co., Ltd., Sai Lun Jinyu
Group Co., Ltd., Double Star Group Limited Liability Company, Aeolus Tyre Co.,
Ltd., Guangzhou Fengli Rubber Tyre Co., Ltd., Qingdao Senqilin Tyre Co., Ltd.,
Michelin (China) Investment Co., Tongyi Tyres Zhangjiagang Co., Ltd.,
Bridgestone (China) Investment Co., Dalian Goodyear Tyre Co., Ltd.,
Continental Brand tyres (China) Co., Ltd., Tianjin Jiurong Wheel Technology
Co., Ltd., Shantou Huge Tyre Testing Equipment Co., Ltd..
Main drafters of this Standard. Xie Peng, Deng Shitao, He Haoming, Chen
Shaomei, Xu Lihong, Wang Kexian, Chen Jianming, Xiao Shenglong, Zhu
Xinjing, Zhang Yong, Ren Shaowen, Zhou Qiong, Sheng Baoxin, Lu Yi, Zhu
Bangneng, Fu Guangping, Yin Qingye, Ma Zhong, Gu Zheng, Chen Xun, Mou
Shouyong.
Versions of standard substituted by this Standard are.
- GB/T 4502-1984, GB/T 4502-1998, GB/T 4502-2009;
- GB/T 4503-1984, GB/T 4503-1996, GB/T 4503-2006;
- GB/T 4504-1984, GB/T 4504-1998;
- GB/T 7034-1986, GB/T 7034-1998.
Laboratory test methods for
passenger car tyres capabilities
1 Scope
This Standard specifies laboratory test methods for verifying the capabilities of
tyres for passenger cars, including terms and definitions used in the tests,
testing equipment and precision, test conditions, testing procedures, judgment
criteria, and test reports. Of the test methods presented, it is possible that only
some will be required, depending on the type of tyre to be tested (tube or
tubeless, diagonal or radial).
This Standard includes.
(1) Bead unseating test. assesses the resistance of the tubeless tyre to bead
unseating.
(2) Strength test. assesses the capability of the tyre structure, with respect
to braking energy, in the tread area.
(3) High speed test. assesses the capability of the tyre according to its
speed category.
(4) Endurance test. assesses the resistance of the type, with respect to
service at specified load and speed.
(5) Low-pressure performance test. assesses reliability of radial tyres under
low pressure, with respect to service at specified load, speed, and low
pressure conditions.
The test methods presented in this Standard are not intended for gradation of
tyre performance or quality levels.
This Standard applies to all pneumatic-tyres for passenger cars.
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.
GB/T 2978-2008 Size designation dimensions inflation pressure and load
capacity for passenger car tyres
GB/T 6326 Tyre terms and definitions (GB/T 6326-2005, ISO 4223-l. 2002,
NEQ)
GB 9743 Passenger car tyres
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 6326
and the following apply.
3.1 test drum speed
test speed
peripheral linear speed of the test drum surface during its rotation
4 Test equipment and precision
4.1 Bead unseating testing machine
4.1.1 The basic structure and main positions and dimensions of the testing
machine are shown in Figure 1.
4.1.2 The testing machine shall be provided with a standard bead unseating
block (Type A, Type B, and Type C) of the dimensions, shape, and
manufacturing material, as shown in Figure 2.
4.1.3 The bead unseating block loading device shall permit progressive
application of the force. Indicators of displacement and force provided shall be
accurate to within ± 1 % of full scale.
4.1.4 The displacement speed of the bead unseating block shall be controlled
with an accuracy within ± 3 % of the full scale.
4.2 Strength testing machine
4.2.1 The testing machine shall be provided with a cylindrical metal plunger
of sufficient length with a hemispherical end and a diameter of 19 ± 0.5 mm.
4.2.2 For the plunger equipment, the loading device shall permit gradual
application of the force. Indicators of displacement and force provided shall be
accurate to within ±1% of full scale.
4.2.3 The displacement speed of the plunger shall be controlled with an
If the given P value is greater than D/2 or slip and other specifications not included calculated in the
following formula.
Calculation
where,
D - Tyre’s new tyre design outside diameter;
D1 - Nominal diameter of rim;
H - Tyre section height, , rounding to the millimeter integer.
5.1.2 Test procedure
5.1.2.1 Readjust the pressure of the rested test tyre to the value specified in
Table 1.
5.1.2.2 Mount the tyre and rim assembly to the bead unseating testing
machine shown in Figure 1 and test the assembly point by point.
5.1.2.3 Position the bead unseating block against the tyre at a horizontal
distance, P, as given in 5.1.1.6.
5.1.2.4 The bead unseating block shall apply to the tyre outer at a rate of 50
mm/min ± 2.5 mm/min to increase the applied force until the minimum bead
unseating resistance specified in Table 8 is reached and the final test point shall
continue until it is unseating or contact with the rim. Correct...
......
GB/T 4502-2009
GB
National Standard
of the People’s Republic of China
ICS 83.160.10
G 41
Replacing GB/T 4502-1998, GB/T 4503-2006, GB/T 4504-1998, GB/T 7034-1998
Laboratory Test Methods
for Passenger Car Tyres Capabilities
(ISO 10191.1995 Passenger car tyres –
Verifying tyre capabilities - Laboratory test methods, MOD)
ISSUE ON. APRIL 4, 2009
IMPLEMENTED ON. DECEMBER 1, 2009
Jointly issued by. General Administration of Quality Supervision, Inspection and
Quarantine (AQSIQ);
Standardization Administration (SAC) of the People's Republic
of China.
Table of Contents
Foreword ... 3
1. Scope ... 7
2. Normative references ... 7
3. Terms and definitions ... 8
4. Test equipment and precision ... 8
5. Test methods ... 10
6. Requirements ... 15
7. Test report ... 17
Annex A ... 18
Annex B ... 20
Foreword
This Standard modifies and adopts ISO 10191.1995 Passenger car tyres - Verifying tyre capabilities -
Laboratory test methods (2nd English edition).
This Standard replaces GB/T 4502-1998 Endurance test for passenger car tyres-Drum method, GB/T
4503-2006 Test method strength for passenger car tyres, GB/T 4504-1998 Bead unseating resistance
test for tubeless passenger car tyres, and GB/T 7034-1998 High speed test for passenger car
tyres-Drum method.
This Standard has been re-drafted according to ISO 10191.1995. GB/T 4502-1998 Endurance test for
passenger car tyres-Drum method, GB/T 4503-2006 Test method strength for passenger car tyres, GB/T
4504-1998 Bead unseating resistance test for tubeless passenger car tyres, and GB/T 7034-1998 High
speed test for passenger car tyres-Drum method have been integrated and revised. And methods for
low-pressure performance test are added.
Annex A provides a list of comparison between chapter and clause numbers of this Standard and ISO
10191.1995, in order to facilitate the comparison.
The technical differences between this Standard and ISO 10191.1995 are marked with vertical single
lines in the main text and the margins of pages where contain the clauses that involve these differences.
Annex B lists out the technical differences and their causes for reference.
The following editing changes are also made to this Standard, in order to facilitate the use.
a) “This International Standard” is changed to “This Standard”;
b) “, ” used as the decimal point is replaced by “.”;
c) The foreword of the international standard is deleted;
d) The bibliography of the international standard is deleted.
Below are the main differences between the chapters and clauses of this Standard and GB/T 4502-1998.
— The arrangement of chapters and clauses are adjusted in this Standard;
— Added and modified Normative References (GB/T 4502-1998 and 2 of this Standard);
— Added and modified precision requirements on the test equipment (4 and 7 of GB/T 4502-1998;
and 4 of this Standard);
— Modified requirements on the test rim (5.1.2 of GB/T 4502-1998; and 5.4.1.2 of this Standard);
— Modified the test inflation pressure of reinforced radial tyres and diagonal tyres of passenger cars
(Table 1);
— Added the test inflation pressures for T Type temporary-use spare tyres (Table 1);
— Modified the test speed for radial tyres of passenger cars by changing it from “80km/h” to
“120km/h” (5.1.4 of GB/T 4502-1998; and 5.4.1.6 of this Standard);
— Modified the provision that the pressure shall be immediately measured after the test is completed.
It is changed to be that the pressure shall be measured within a cooling period of (15~25) min
(5.2.5 of GB/T 4502-1998; and 5.4.2.4 of this Standard);
— Deleted the requirement that the outer dimensions of the tyre shall be measured before and after
the test (5.2.1 and 5.2.5 of GB/T 4502-1998);
— Added requirements on the judgment of test results, including that the pressure measures as
required after the test shall not be lower than 95% of the initial pressure, and that no visual
evidence of damages shall be found in appearance check (6.4 of this Standard);
— Modified and added requirements on the test report and its contents (7 of this Standard).
Below are the main differences between the chapters and clauses of this Standard and GB/T 4503-2006.
— The arrangement of chapters and clauses is adjusted in this Standard;
— Modified requirements on the test rim (5.2 of GB/T 4503-1998; and 5.2.1.2 and 5.2.1.3 of this
Standard);
— Modified and added requirements on the test report and its contents (7 of this Standard).
Below are the main differences between the chapters and clauses of this Standard and GB/T 4504-1998.
— The arrangement of chapters and clauses is adjusted in this Standard;
— Added and modified Normative References (2 of GB/T 4504-1998; and 2 of this Standard);
— Modified requirements on the test tyre and its appearance (5.1.1 and 5.1.2 of GB/T 4504-1998;
and 5.1.1.1 of this Standard);
— Modified requirements on the test rim (5.1.2 of GB/T 4504-1998; and 5.1.1.2 of this Standard);
— Modified the test inflation pressure of reinforced radial tyres and diagonal tyres of passenger cars
(Table 3 of GB/T 4504-1998; and Table 1 of this Standard);
— Added the test inflation pressures and minimum bead unseating resistance for T Type
temporary-use spare tyres (Table 1 and Table 7 of this Standard);
— Modified requirements on formula computation of p values of tyres of 65 and its following series
and designated p values according to the normal diameters of rims of 4 categories (normal
height/width ratio 55~80, 50/45, 40/35, 30/25). Added p values corresponding to the T Type
temporary-use spare tyres and rims of normal diameters 20~28 (Table 2 of GB/T 4504-1998; and
Table 2 of this Standard);
— Added Type A bead unseating blocks which are specially used for T Type temporary use spare
tyres and passenger car tyres of nominal rim diameters 10~19; and Type C bead unseating blocks
which are specially used for passenger car tyres of nominal rim diameters 20~28 (5.1.1.6 Figure 2
of this Standard);
— Modified and added requirements on the test report and its contents (7 of this Standard).
Below are the main differences between the chapters and clauses of this Standard and GB/T 7034-1998.
— The arrangement of chapters and clauses is adjusted in this Standard;
— Added and modified Normative References (GB/T 7034-1998 and 2 of this Standard);
— Added and modified precision requirements on the test equipment (7 of GB/T 7034-1998; and 4 of
this Standard);
— Modified requirements on the test rim (5.1.2 of GB/T 7034-1998 and 5.3.1.2 of this Standard);
— Modified the specified values of test inflation pressure of radial tyres of speed symbols W and Y,
8PR diagonal tyres, and T Type temporary-use spare tyres (Table 1 of GB/T 7034-1998 and Table
3 of this Standard);
— Deleted “belted radial tyres” (Table 1 of GB/T 7034-1998; and Table 3 of this Standard);
— Modified the load rate for test of tyres of speed symbol H and below by changing it from “65%” to
“80%”. Increased the load rates of tests of radial tyres of speed symbols W and Y (Table 2 of GB/T
7034-1998; and Table 4 of this Standard);
— Added the test procedure for passenger car tyres of speed symbols W and Y (Table 2 of GB/T
7034-1998; and Table 5 of this Standard);
— Modified the requirement that the pressure shall be immediately measured after the test is
completed. It is changed to be that the pressure shall be measured within a cooling period of
(15~25) min (5.2.5 of GB/T 7034-1998; and 5.3.2.4 of this Standard);
— Deleted the requirement that the outer dimensions of the tyre shall be measured before and after
the test (5.2.1 and 5.2.5 of GB/T 7034-1998);
— Added requirements on the judgment of test results, including that the pressure measures as
required after the test shall not be lower than 95% of the initial pressure, and that no visual
evidence of damages shall be found in appearance check (6.3 of this Standard);
— Modified and added requirements on the test report and its contents (7 of this Standard).
Annex A and Annex B of this Standard are normative.
This Standard was proposed by China Petroleum & Chemical Industry Association.
This Standard shall be centrally managed by SAC Technical Committee for Standardization of Tyres and
Rim.
Responsible drafting organizations of this Standard. Guangzhou Huanan Rubber Tyres Co., Ltd,
Hangzhou Zhongce Rubber Co., Ltd, Anhui Jiatong Tyres Co., Ltd, Sanjiao Tyres Co., Ltd, Beijing
Research & Design Institute of Rubber Industry, Beijing Capital Tyre Co., Ltd, Shandong Linglong
Rubber Co., Ltd, Qingdao Huanghai Rubber Group Co., Ltd, Nanjing Kumho Tyre Co., Ltd, Shantou
Haoda Tyre Testing Equipment Co., Ltd, and Qingdao Gaoxiao Measurement & Cont...
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