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GB/T 44550-2024Test method for endurance performance of pneumatic tyres for industrial vehicles (English PDF)

工业车辆充气轮胎耐久性试验方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

September 29, 2024

Implementation date

April 1, 2025

Scope

GB/T 44550-2024 is the English-translated version of 工业车辆充气轮胎耐久性试验方法.

GB/T 44550-2024 is the Chinese national standard covering the drum test that tells whether a forklift tyre survives its rated duty — the endurance machine and the accuracy demanded of its drum, loading device and pressure gauge, the conditions from drum size to the 38 °C ambient, the speed and load steps set as a percentage of the maximum rated load, and the judgement rules that decide whether the carcass came through intact. First edition, under the China Petroleum and Chemical Industry Federation. In force from 1 April 2025. Issued on 29 September 2024, it has been in force since 1 April 2025.

Document preview — GB/T 44550-2024

National Standard of the People's Republic of China

ICS: 83.160.99
Classification: G 41

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Foreword3
1 Scope4
2 Normative references4
3 Terms and definitions4
4 Test equipment and its accuracy requirements4
5 Test conditions5
6 Test steps6
7 Judgement rules6
8 Test report7

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

GB/T 521

GB/T 2982

GB/T 6326

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 ......

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 521Test methods for measuring peripheral dimensions of tyres

GB/T 2982 · GB/T 6326

Editions of GB/T 44550

Edition	Title	Revision	Status
GB/T 44550-2024	Test method for endurance performance of pneumatic tyres for industrial vehicles	current edition	Current

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