GB/T 29035-2022 English PDF

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GB/T 29035-2022: Test method for flexible graphite ring
Status: Valid

GB/T 29035: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 29035-2022	359	Add to Cart	4 days	Test method for flexible graphite ring	Valid
GB/T 29035-2012	319	Add to Cart	3 days	Test method for physical-mechanical performance of flexible graphite ring	Obsolete

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Basic data

Standard ID: GB/T 29035-2022 (GB/T29035-2022)
Description (Translated English): Test method for flexible graphite ring
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J22
Classification of International Standard: 21.140
Word Count Estimation: 18,181
Date of Issue: 2022-12-30
Date of Implementation: 2023-07-01
Older Standard (superseded by this standard): GB/T 29035-2012
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 29035-2022: Test method for flexible graphite ring

---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.
ICS 21.140 CCSJ22 National Standards of People's Republic of China Replacing GB/T 29035-2012 Test method for flexible graphite packing rings Posted on 2022-12-30 2023-07-01 implementation State Administration for Market Regulation Released by the National Standardization Management Committee

table of contents

Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Determination of density 1 4.1 Instruments and equipment 1 4.2 Sample 1 4.3 Test conditions 1 4.4 Test Step 1 4.5 Experimental data processing 1 5 Determination of friction coefficient 2 5.1 Instruments and equipment 2 5.2 Sample 3 5.3 Test Step 3 5.4 Experimental data processing 4 6 Determination of compression rate and rebound rate 4 6.1 Instruments and equipment 4 6.2 Sample 5 6.3 Test step 5 6.4 Experimental data processing 5 7 Determination of thermal weight loss 5 7.1 Test principle 5 7.2 Instruments and equipment 5 7.3 Sample Conditioning 6 7.4 Test step 6 7.5 Experiment data processing 6 8 Determination of sulfur content 6 8.1 Test principle 6 8.2 Reagents and materials 7 8.3 Instruments and equipment 7 8.4 Sample requirements and its preparation 8 8.5 Test step 8 8.6 Test data processing 9 8.7 Precision 9 9 Test report 9 Figure 1 Friction and wear testing machine 2 Figure 2 Grinding ring 3 Figure 3 Sample holder 3 Figure 4 Compression rebound test device 4 Figure 5 Determination of sulfur absorption bottle 7 Figure 6 Sulfur content determination test device 8

foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules for Standardization Documents" drafting. This document replaces GB/T 29035-2012 "Test methods for flexible graphite packing rings". Compared with GB/T 29035-2012, except for the structure In addition to adjustments and editorial changes, the main technical changes are as follows. a) Changed the requirements for friction coefficient test equipment (see 5.1.1, 3.1.1~3.1.3 of the.2012 edition); b) Added a schematic diagram of the friction coefficient test device (see Figure 1); c) Added the requirements for the size of the friction coefficient test sample (see 5.2); d) Changed the schematic diagram of the compression rebound device (see Figure 4, Figure 3 of the.2012 edition); e) Delete the size limitation on the compression rebound test device (see 4.1.2.1, 4.1.2.2 of the.2012 edition); f) Delete the 250°C thermogravimetric test step, modify the 450°C thermogravimetric test step, and add the 670°C thermogravimetric test step (See 7.4.1~7.4.3, 5.4.1 and 5.4.2 of the.2012 edition); g) Changed the allowable error range of the thermal weight loss test results (see 7.5.2, 7.5.3, 5.5.2, 5.5.3 of the.2012 edition); h) Added the determination method of sulfur content (see Chapter 8). Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed by China Machinery Industry Federation. This document is under the jurisdiction of the National Standardization Technical Committee on Packing and Static Seals (SAC/TC350). This document is drafted by. Hefei General Machinery Research Institute Co., Ltd., Hefei General Mechanical and Electrical Products Testing Institute Co., Ltd., Ningbo Xinyimi Sealing Co., Ltd., Zhejiang Guotai Xiaoxing Sealing Material Co., Ltd., Taizhou Anyuan Enterprise Management Consulting Co., Ltd. The main drafters of this document. Cheng Yunlang, He Song, Wang Jing, Lu Lu, Song Guoxuan, Wu Yimin, Zhang Jiahong, Yang Kui. This document was first published in.2012, and this is the first revision. Test method for flexible graphite packing rings

1 Scope

This document specifies the instruments and equipment for measuring the ring density, friction coefficient, compressibility, rebound rate, thermal weight loss and sulfur content of flexible graphite packing, Sample requirements, test procedures and calculation of test results. This document applies to the testing of the physical, mechanical properties and sulfur content of flexible graphite packing rings.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document. GB/T 1800.1-2020 Geometric Product Specifications (GPS) Linear Dimensional Tolerances ISO Code System Part 1.Tolerances, Basis of Deviation and Fit

3 Terms and Definitions

This document does not have terms and definitions that need to be defined.

4 Determination of density

4.1 Instruments and equipment 4.1.1 Balance. Sensitivity 0.001g. 4.1.2 Vernier caliper. the precision is 0.02mm. 4.2 Samples There are no less than 5 samples in each group, and the cross-section of the samples is rectangular. 4.3 Test conditions The ambient temperature is (23±5)°C. 4.4 Test procedure 4.4.1 Use a vernier caliper to measure the inner diameter and outer diameter of the sample (measure 3 points in equal arcs, and take the arithmetic mean value), with an accuracy of 0.1 mm. 4.4.2 Measure the height of the sample with a vernier caliper (measure 3 points equidistantly, and take the arithmetic mean value), with an accuracy of 0.1mm. 4.4.3 Weigh the mass of the sample, accurate to 0.01g. 4.5 Experiment data processing 4.5.1 The density of a single sample is calculated according to formula (1). ......

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