GB/T 33097-2025Elastic insulating suspension components (English PDF)

3 Terms and definitions

4 Construction

5 Requirements

6 Test methods

7 Inspection rules

8 Marking, packaging, transport and storage

Foreword

This document is 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.

This document replaces GB/T 33097-2016, Elastic insulating suspension component. Compared with GB/T 33097-2016, apart from structural adjustments and editorial changes, the main technical changes are as follows:

a) the requirements for machining accuracy of component parts have been deleted (see 4.1.1 of the 2016 edition);

b) requirements for the appearance and structure of the conductive sliding pad have been added (see 5.1.2.3);

c) the material requirements for nuts and washers have been deleted (see 4.1.3.1 of the 2016 edition);

d) the material requirements for the insulating core rod have been changed (see 5.1.3.2; 4.1.3.2 of the 2016 edition);

e) the material requirements for the rubber elastomer and the insulating sheds have been changed (see Table 1; Tables 2 and 3 of the 2016 edition);

f) the fitting dimension requirements for the suspension component have been changed (see Table 3; Table 4 of the 2016 edition);

g) the mechanical property requirements for the suspension component have been changed (see Table 4; Table 5 of the 2016 edition);

h) the creepage distance values of the electrical properties have been changed (see Table 5; Table 6 of the 2016 edition);

i) the test methods for machining accuracy of component parts and for nuts and washers have been deleted (see 5.1.1.1 and 5.1.3 of the 2016 edition);

j) the test methods for the mechanical properties of the suspension component have been changed (see 6.2.3; 5.2.3 of the 2016 edition);

k) the test conditions and test specimen mounting requirements for the electrical property tests of the suspension component have been changed (see 6.2.4.1; 5.2.4.1 of the 2016 edition);

l) the test method for artificial pollution withstand voltage has been changed (see 6.2.4.5; 5.2.4.5 of the 2016 edition);

m) the inspection rules have been changed (see Clause 7; Clause 6 of the 2016 edition).

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.

This document was proposed by the China Petroleum and Chemical Industry Federation.

This document is under the jurisdiction of the National Technical Committee on Rubber and Rubber Products of Standardization Administration of China (SAC/TC 35).

Drafting organisations of this document: Zhejiang Wanglong Rail Transit Equipment Co., Ltd., Power Supply Branch of Shanghai Metro Maintenance Support Co., Ltd., Hangzhou Metro Group Co., Ltd., China Railway Design Corporation, China Railway First Survey and Design Institute Group Co., Ltd., China Railway Eryuan Engineering Group Co., Ltd., China Railway Electrification Survey and Design Institute Co., Ltd., Guangzhou Metro Design and Research Institute Co., Ltd., China Railway Test and Certification Center Co., Ltd., China Railway Baoji Rail Electrical Equipment Testing Co., Ltd., Beijing Huateng Testing and Certification Co., Ltd.

Main drafters of this document: Zheng Guomin, Hu Lina, Xie Jianhui, Fu Junwu, Guo Yajie, Zhang Xianyu, Chen Xianzhi, Zhou Yujie, Lin Shan, Huang Yuequn, Zhang Hongwu.

This document was first issued in 2016; this is the first revision.