GB/T 44550-2024 English PDF (GBT44550-2024)

Delivery: 3 seconds. Download true-PDF + Invoice.
Get QUOTATION in 1-minute: Click GB/T 44550-2024
Historical versions: GB/T 44550-2024
Preview True-PDF (Reload/Scroll if blank)

GB/T 44550-2024: Test method for endurance performance of pneumatic tyres for industrial vehicles
GB/T 44550-2024
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 83.160.99
CCS G 41
Test method for endurance performance of pneumatic tyres
for industrial vehicles
ISSUED ON: SEPTEMBER 29, 2024
IMPLEMENTED ON: APRIL 01, 2025
Issued by: State Administration for Market Regulation;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 4
4 Test equipment and its accuracy requirements ... 4
5 Test conditions ... 5
6 Test steps ... 6
7 Judgement rules ... 6
8 Test report ... 7
Foreword
This document was drafted in accordance with the rules given in GB/T 1.1-2020
"Directives for standardization - Part 1: Rules for the structure and drafting of
standardizing documents".
Attention is drawn to the possibility that some of the elements of this document may be
the subject of patent rights. The issuing authority shall not be held responsible for
identifying any or all such patent rights.
This document was proposed by China Petroleum and Chemical Industry Federation.
This document shall be under the jurisdiction of National Technical Committee on Tyres
and rims of Standardization Administration of China (SAC/TC 19).
The drafting organizations of this document: Guizhou Tyre Co., Ltd., Zhongce Rubber
Group Co., Ltd., Xiamen Chengshin Rubber Industry Co., Ltd., Zhongce Rubber
(Tianjin) Co., Ltd., Shantou Haoda Tyre Testing Equipment Co., Ltd., Shandong
Linglong Tyre Co., Ltd., Beijing Rubber Industry Research and Design Institute Co.,
Ltd., Xuzhou Xulun Rubber Co., Ltd., Triangle Tyre Co., Ltd., Sailun Group Co., Ltd.,
Fengshen Tyre Co., Ltd., Hebei Wanda Tyre Co., Ltd., Hai'an Rubber Group Co., Ltd.,
Michelin (China) Investment Co., Ltd., Bridgestone (China) Investment Co., Ltd.,
Dalian Goodyear Tyre Co., Ltd., Heilongjiang Red River Valley Automotive Testing
Co., Ltd., Jining Qilu Testing Technology Co., Ltd., Guangdong Guangdong-Hong
Kong-Macao Greater Bay Area Huangpu Materials Research Institute, Tianjin Jiurong
Industrial Technology Co., Ltd., Qingdao Houze Jinye Technology Co., Ltd.
Main drafters of this document: Lin Xiaoyong, Li Gongwu, Chen Jianming, Huang
Binwen, Chen Xun, Zhang Lijie, Mou Shouyong, Zheng Rui, Sui Anquan, Wu Junrong,
Shi Chao, Pei Quanhua, Yu Zhenjiang, Huang Zhenhua, Zhou Ling, Zhu Cheng, Yin
Qingye, Zhao Xinhong, Gao Ming, Xun Yan, Gu Zheng, Tang Shunfeng, Xu Lihong,
Li Shuhuan, Li Miaomiao, Yang Zhong.
Test method for endurance performance of pneumatic tyres
for industrial vehicles
1 Scope
This document describes the test method for endurance performance of pneumatic tyres
for industrial vehicles, including test equipment and accuracy requirements, test
conditions, test steps, judgment rules and test report.
This document applies to new pneumatic tyres for industrial vehicles.
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 521, Test methods for measuring peripheral dimensions of tyres
GB/T 2982, Industrial vehicle pneumatic tyre specifications, dimensions, air
pressure and load
GB/T 6326, Tyre -- Vocabulary
HG/T 2177, Appearance quality of tyres
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in GB/T 6326 as
well as the followings apply.
3.1 test speed
The linear speed of the drum surface along the circumferential direction when the steel
testing machine drum rotates.
4 Test equipment and its accuracy requirements
4.1 Endurance testing machine
4.1.1 The diameter of the testing machine drum is 1700 mm ± 17 mm or 3000 mm ± 30
mm.
4.1.2 The test drum surface of the testing machine shall be a smooth steel surface. Its
width shall not be less than the total cross-sectional width of the test tyre.
4.1.3 The loading capacity of the test loading device shall be able to meet the
requirements of the test method, and its accuracy shall be ±1.5% of the full scale.
4.1.4 The speed capability of the testing machine drum and the testing equipment shall
meet the requirements of the test method. The speed accuracy shall be km/h.
4.1.5 The radial runout of the testing machine drum shall not be greater than 0.25 mm.
4.1.6 The ambient temperature measuring device shall be set within the range of 150
mm to 1000 mm from the test tyre.
4.2 Inflation pressure gauge
The accuracy of the inflation pressure gauge is ±10 kPa.
5 Test conditions
5.1 The appearance quality of the test tyres shall comply with the requirements of HG/T
2177.
5.2 For tyres with a rim nominal diameter code less than 24, a 1700 mm drum tester
shall be used. For tyres with a rim nominal diameter code of 24 or above, a 3000 mm
drum tester shall be used.
5.3 The test rim shall comply with the provisions of GB/T 2982 or relevant industry
technical documents on measuring rims. Install the test tyre on the test rim and inflate
it to the pressure specified in GB/T 2982 or relevant industry technical documents.
5.4 The ambient temperature during the test shall be 38°C±3°C. The tyre-rim assembly
shall be kept at the ambient temperature for at least 24 h.
5.5 The time from the test drum starting with uniform acceleration to the initial test
speed shall be within 5 min.
5.6 The endurance test speed and test load of each series of tyres shall comply with the
test speed and percentage of the maximum rated load of the tyre specified in Table 1.
The maximum rated load of ordinary section, low section bias and radial tyres shall be
in accordance with the load capacity of the driving wheel of the counterbalanced forklift
at a speed of 25 km/h in GB/T 2982 or relevant industry technical documents. If there
is no corresponding data, the corresponding load capacity of other industrial vehicles at
a speed of 25 km/h shall be used. The maximum rated load of metric series bias and