GB/T 39709-2020 English PDF

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GB/T 39709-2020: Test methods of multiple units glass, windows static pressure and windows sealing performance
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 39709-2020	169	Add to Cart	3 days	Test methods of multiple units glass, windows static pressure and windows sealing performance	Valid

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Basic data

Standard ID: GB/T 39709-2020 (GB/T39709-2020)
Description (Translated English): Test methods of multiple units glass, windows static pressure and windows sealing performance
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Q34
Classification of International Standard: 81.040.01
Word Count Estimation: 9,942
Date of Issue: 2020-12-14
Date of Implementation: 2021-11-01
Quoted Standard: GB/T 8170
Regulation (derived from): National Standard Announcement No. 28 of 2020
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration
Summary: This standard specifies the test conditions, basic principles of the test, test equipment, test samples, test procedures and test reports for the static pressure resistance of EMU glass, windows and window sealing performance tests. This standard is applicable to the evaluation of static pressure resistance and sealing performance of EMU glass, front windows and side windows with a speed greater than or equal to 160 km/h.

GB/T 39709-2020: Test methods of multiple units glass, windows static pressure and windows sealing performance

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
(Test method for static pressure resistance of EMU glass and windows and sealing performance of windows) ICS 81:040:01 Q34 National Standards of People's Republic of China EMU glass and windows are resistant to static pressure and Test method of window sealing performance 2020-12-14 release 2021-11-01 implementation State Administration for Market Regulation Issued by the National Standardization Management Committee

Table of contents

Foreword Ⅰ 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 Test conditions 1 5 Basic principles of the test 2 5:1 Static pressure resistance 2 5:2 Sealing performance 2 6 Test equipment 2 7 Test sample 2 8 Test procedure 3 8:1 Static pressure resistance 3 8:2 Static time constant τstat 3 8:3 Static equivalent leakage hole area 4 9 Test report 5 Appendix A (informative appendix) Calculation of air density and local speed of sound 6

Foreword

This standard was drafted in accordance with the rules given in GB/T 1:1-2009: This standard was proposed by the China Building Materials Federation: This standard is under the jurisdiction of the National Industrial Glass and Special Glass Standardization Technical Committee (SAC/TC447): Drafting organizations of this standard: China Building Materials Inspection and Certification Group Co:, Ltd:, Fujian Wanda Automobile Glass Industry Co:, Ltd:, Jiangsu Tiejiao Glass Co:, Ltd:, Anping County Jinlong Vehicle Equipment Co:, Ltd:, CRRC Changchun Rail Bus Co:, Ltd:, CRRC Qingdao Si Fang Locomotive & Rolling Stock Co:, Ltd:, CRRC Tangshan Locomotive & Rolling Stock Co:, Ltd:, Henan CCIC Engineering Inspection Co:, Ltd:, Beijing Sanhe Taida Technology Technology Co:, Ltd: The main drafters of this standard: Liu Haitao, Wang Wei, Wang Yinmao, Xu Shidong, Ma Tao, Pang Shihong, Ma Qingjun, Fan Yanyu, Gao Lin, Zhao Jihu, Wu Fan, Chen Baolin, Chen Xi, Su Ping, Jia Huaiyu, Li Haijian: EMU glass and windows are resistant to static pressure and Test method of window sealing performance

1 Scope

This standard specifies the test conditions, basic principles, test equipment, test equipment, Test samples, test procedures and test reports: This standard is applicable to the evaluation of static pressure resistance and sealing performance of EMU glass, front windows and side windows with a speed greater than or equal to 160km/h:

2 Normative references

The following documents are indispensable for the application of this document: For dated reference documents, only the dated version applies to this article Pieces: For undated references, the latest version (including all amendments) applies to this document: GB/T 8170 Numerical rounding rules and the expression and determination of limit values

3 Terms and definitions

The following terms and definitions apply to this document: 3:1 Static pressureresistance The ability of the sample to withstand evenly distributed loads: 3:2 Timeconstant The ratio of the pressure difference between inside and outside the vehicle to the change in pressure inside the vehicle is expressed by formula (1): τ = pi-pe()/dpi/dt() (1) Where: τ --- time constant in seconds (s); pi --- the pressure inside the car, the unit is Pa (Pa); pe --- pressure outside the vehicle, in Pa (Pa); t --- time, in seconds (s): 3:3 Static time constant statictimeconstant τstat The time constant obtained from the static leakage test of the vehicle at a standstill: Note: The static time constant is numerically equal to the time taken when the pressure difference between inside and outside the vehicle is reduced from the initial value to 1/e of the initial value, e is the natural constant:

4 Test conditions

Except for special requirements, the test should be carried out under the following environmental conditions: ......

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