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GB/T 30196-2022 PDF in English


GB/T 30196-2022 (GB/T30196-2022, GBT 30196-2022, GBT30196-2022)
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GB/T 30196-2022: PDF in English (GBT 30196-2022)

GB/T 30196-2022
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 83.160.10
CCS G 41
Replace GB/T 30196-2013
Self-supporting run flat tyres
[ISO 16992:2018, Passenger car tyres - Spare unit substitutive equipment
(SUSE), MOD]
ISSUED ON: MARCH 9, 2022
IMPLEMENTED ON: OCTOBER 1, 2022
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope of application ... 5
2 Normative references ... 5
3 Terms and definitions ... 5
4 Technical requirements ... 6
5 Special marks ... 6
6 Test methods ... 8
Appendix A (Informative) Chapter number comparison between this document and ISO
16992:2018 ... 14
Appendix B (Informative) Technical differences between this document and ISO
16992:2018 and their reasons ... 16
Self-supporting run flat tyres
1 Scope of application
This document specifies the technical requirements, special marks, and test methods for
self-supporting run-flat tyres.
This document applies to new self-supporting run-flat passenger radial tyres.
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/T 2978 Size designation, dimensions, inflation pressure and load capacity for
passenger car tyres
GB/T 3487 Rims for passenger car (GB/T 3487-2015, ISO 4000-2:2013, MOD)
GB/T 4502 Laboratory test methods for passenger car tyres capabilities (GB/T 4502-
2016, ISO 10191:2010, MOD)
GB/T 6326 Tyre terms and definitions (GB/T 6326-2014, ISO 4223-1:2002, NEQ)
GB/T 8170 Rules of rounding off for numerical values and expression and judgment
of limiting values
HG/T 2177 Appearance quality of tyres
3 Terms and definitions
The terms and definitions defined in GB/T 6326 and the following apply to this
document.
3.1 self-supporting run-flat tyres
It is a pneumatic tyre that is designed to run under normal inflation and still be able to
travel a certain distance at a certain speed, without any other accessory accessories, in
a depleted state.
Note: Self-supporting run-flat tyres are divided into two categories, those that have passed the durability
test of 6.1 are Class I, and those that have passed the durability test of 6.2 are Class II.
3.2 flat tyre running mode
The running state of pneumatic tires under the inflation pressure of 0 kPa~70 kPa.
4 Technical requirements
4.1 Class I self-supporting run-flat tyres shall meet the requirements of 6.1 and 6.3; the
specification mark shall be indicated according to 5.1 and the special mark shall be
marked according to 5.2.
4.2 Class II self-supporting run-flat tyres shall comply with the requirements of 6.2 and
6.3, and shall be marked with special marks according to 5.3.
5 Special marks
5.1 Class I self-supporting run-flat tyres are identified by the special specification
additional mark “F” added after the structure code “R”, such as 195/55RF16,
205/45ZRF17, to be distinguished from ordinary car radial tires.
5.2 The special mark for Class I self-supporting run-flat tyres, which are applicable to
the test procedures specified in 6.1 and meet the performance requirements of 6.3, is
shown in Figure 1. A permanent mark shall be marked on the sidewall of the tyre.
5.3 The special mark for Class II self-supporting run-flat tyres, which are applicable to
the test procedures specified in 6.2 and meet the performance requirements of 6.3, is
shown in Figure 2. A permanent mark shall be marked on the sidewall of the tyre.
The test equipment and its accuracy shall comply with the relevant provisions of
medium and high-speed durability testing machines in GB/T 4502, and the accuracy of
the displacement sensor shall be ±1 mm.
6.1.2 Test preparation and test conditions
6.1.2.1 The appearance quality of the test tyre shall meet the requirements of HG/T
2177.
6.1.2.2 The test rim shall meet the requirements of GB/T 2978; the rim contour shall
meet the requirements of GB/T 3487, and both sides shall have humps (round or flat).
6.1.2.3 The test tyre and rim assembly inflated with an air pressure of 250 kPa shall be
parked for more than 3 h at the laboratory ambient temperature of 38 ℃±3 ℃.
6.1.2.4 The test speed shall be set to 75 km/h, and the test load shall be 65% of the load
capacity corresponding to the load index. The test drum shall be started with uniform
acceleration, and the specified test speed shall be reached within 5 min.
6.1.2.5 After the specified test speed is reached, the test shall be continuous for 60 min
under the test load and speed.
6.1.2.6 The camber angle and sideslip angle of the test tyre shall be both 0°. If there are
special requirements, the sideslip angle can be ±1°.
6.1.2.7 During the whole test process, the ambient temperature shall be kept within the
range of 38 ℃±3 ℃.
6.1.3 Test procedure
6.1.3.1 Pull out the valve core from the parked test tyre to completely deflate the test
tyre. The valve core shall not be installed again.
6.1.3.2 Install the tyre and rim assembly prepared in accordance with the provisions of
6.1.3.1 on the high-speed durability testing machine, making it perpendicular to the
drum surface of the test drum, and apply the test load specified in 6.1.2.4 to the test
wheel axle.
6.1.3.3 Carry out the test according to the test conditions specified in 6.1.2.4~6.1.2.7.
At the beginning of the test, read the distance (Rstart) from the center of the wheel axle
to the drum surface, and calculate the corresponding section height (Zstart) according to
6.4.1, as shown in Figure 3. The test shall not be interrupted, and the tyre shall not be
cooled artificially; the tyre pressure shall not be adjusted, and the test speed and test
load shall be kept constant.
6.1.3.4 At the end of the test, read the distance (Rend) from the center of the wheel axle
to the drum surface, and calculate the corresponding section height (Zend) according to
6.4.1, as shown in Figure 3.
6.1.3.5 After the test is completed, disassemble the tyre after it cools naturally and
inspect its appearance.
6.2 Test method for the durability performance of Class II self-supporting run-flat
tyres in the run-flat state
6.2.1 Test equipment and accuracy
The test equipment and its accuracy shall comply with the relevant provisions of
medium and high-speed durability testing machines in GB/T 4502, and the accuracy of
the displacement sensor shall be ±1 mm.
6.2.2 Test preparation and test conditions
6.2.2.1 The appearance quality of the test tyre shall meet the requirements of HG/T
2177.
6.2.2.2 The test rim shall comply with the provisions on measuring rims in GB/T 2978;
the rim contour shall comply with the requirements of GB/T 3487, and both sides shall
have humps (round or flat).
6.2.2.3 The test tyre and rim assembly inflated with the air pressure of 250 kPa shall be
parked for more than 3 h at the ambient temperature of 25 ℃±3 ℃.
6.2.2.4 The test speed shall be set to 75 km/h, and the test load shall be 60% of the load
capacity corresponding to the load index; the test drum shall be started with the uniform
acceleration, and the specified test speed shall be reached within 5 min.
6.2.2.5 After the specified test speed is reached, the test shall be continuous for 60 min
under the test load and speed.
6.2.2.6 The camber angle and sideslip angle of the test tyre shall be both 0°. If there are
special requirements, the sideslip angle can be ±1°.
6.2.2.7 During the whole test process, the ambient temperature shall be kept within the
range of 25 ℃±3 ℃.
6.2.3 Test procedure
6.2.3.1 Pull out the valve core from the parked test tyre to completely deflate the test
tyre. The valve core shall not be installed again.
6.2.3.2 Install the tyre and rim assembly prepared in accordance with the provisions of
6.2.3.1 on the high-speed durability testing machine, making it perpendicular to the
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.