Skip to product information
1 of 4

PayPal, credit cards. Download editable-PDF and invoice in 1 second!

GB/T 39970-2021 English PDF (GBT39970-2021)

GB/T 39970-2021 English PDF (GBT39970-2021)

Regular price $75.00 USD
Regular price Sale price $75.00 USD
Sale Sold out
Shipping calculated at checkout.
Quotation: In 1-minute, 24-hr self-service. Click here GB/T 39970-2021 to get it for Purchase Approval, Bank TT...

GB/T 39970-2021: Thresholds and grading of coast-by noise for motor vehicle tyres

This Standard specifies the thresholds and grading requirements and test methods for coast-by noise for motor vehicle tyres. This Standard is applicable to new vehicle radial tyres and new mini, light truck radial tyres and new truck radial tyres, excluding tyres with nominal rim diameter ??10 inches and nominal rim diameter ??25 inches, T-type spare tyres for temporary use only, special ST metric tyres for road trailers, high-passability radial tyres for light truck vehicle, heavy truck tyres with a speed capability of 80km/h (not included), racing tyres, studded tyres and professional off-road tyres.
GB/T 39970-2021
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 83.160.10
G 41
Thresholds and grading of coast-by noise for motor
vehicle tyres
ISSUED ON: MAY 21, 2021
IMPLEMENTED ON: DECEMBER 01, 2021
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 Thresholds and grading requirements for coast-by noise ... 5
5 Test methods ... 7
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009. This Standard was proposed by China Petroleum and Chemical Industry
Federation.
This Standard 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 Standard: Beijing Rubber Industry Research and Design Institute Co., Ltd., Anhui Detech Automobile Testing Center Co., Ltd., Triangle Tire Co., Ltd., Shandong Linglong Tire Co., Ltd., Double Star Group Co., Ltd., Double Coin Group Shanghai Tire Research Institute Co., Ltd., Zhongce Rubber Group Co., Ltd., Sailun Group Co., Ltd., Anhui Jiatong
Passenger Radial Tire Co., Ltd., Wanli Tire Co., Ltd., Fengshen Tire Co., Ltd., Chaoyang Langma Tire Co., Ltd., Qingdao Senkirin Tire Co., Ltd., Sichuan Tire and Rubber (Group) Co., Ltd., Shandong Jinyu Tire Co., Ltd., Tongji University, China Quality Certification Center, Xiamen Zhengxin Rubber Industry Co., Ltd., Pulin Chengshan (Shandong) Tire Co., Ltd., Jiangsu General Technology Co., Ltd., Shandong Huasheng Rubber Co., Ltd., Guizhou Tire Co., Ltd., Shandong Xinghongyuan Tire Co., Ltd., Shandong Zhongren Bureau Veritas Testing
Technology Co., Ltd., Beijing Zhongqihua Standard Measurement and Control Technology Co., Ltd., Shandong Fengyuan Tire Manufacturing Co., Ltd.,
Michelin (China) Investment Co., Ltd., Continental Tire (China) Co., Ltd., Bridgestone (China) Investment Co., Ltd., Dalian Goodyear Tire Co., Ltd., Sumitomo Rubber (China) Co., Ltd., Hankook Tire Co., Ltd., Yokohama Rubber Co., Ltd., SAIC-GM-Wuling Automobile Co., Ltd., Nanjing Iveco Automobile Co., Ltd.
Main drafters of this Standard: Wang Kexian, Li Shuhuan, Wu Xiaodong, Zhou Pengcheng, Chen Shaomei, Gao Tongshun, Zhang Lingyan, Zhu Zhenhua,
Wang Jianqiang, Ma Xiuxiang, Huang Junqi, Li Zhao, Yu Haili, Liu Jingjing, Luo Jiangang, Yang Wanlong, Ge Jianmin, Zhao Xiang, Chen Jianming, Che
Mingming, Ding Zhenhong, Xiao Shenglong, Huang Ge Ge, Li Renguo, Sun
Xiaofei, Wang Dong, Ning Weiming, Lu Yi, Ma Zhong, Gu Yunpeng, Yin Qingye, Zhang Bin, Liu Qingjie, Wang Zhenxiao, Wei Baolyu, Zhu Xiao, Mou Shouyong, Xu Lihong, Zheng Rui, Li Julong, Jiang Zhongkai, He Pengchun
Thresholds and grading of coast-by noise for motor
vehicle tyres
1 Scope
This Standard specifies the thresholds and grading requirements and test methods for coast-by noise for motor vehicle tyres.
This Standard is applicable to new vehicle radial tyres and new mini, light truck radial tyres and new truck radial tyres, excluding tyres with nominal rim diameter ???10 inches and nominal rim diameter ???25 inches, T-type spare tyres for
temporary use only, special ST metric tyres for road trailers, high-passability radial tyres for light truck vehicle, heavy truck tyres with a speed capability of 80km/h (not included), racing tyres, studded tyres and professional off-road tyres.
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 6326, Tyre terms and definitions
GB/T 22036, Coast-by methods for measurement of tyre-to-road sound
emission
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 traction tyre
Tyres that are mainly designed for driving wheels of vehicles. Compared with ordinary tyres, this type of tyre has better gripping performance and can transmit the power of the vehicle to the maximum extent. The tyre tread has at least 2 circumferential strip patterns. Each pattern contains no less than 30 pattern blocks. These blocks are separated by grooves and small sipes that are

View full details