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Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 7939.1-2024: Connections for hydraulic fluid power - Test methods - Part 1: Connectors Status: Valid GB/T 7939.1: Historical versions
Basic dataStandard ID: GB/T 7939.1-2024 (GB/T7939.1-2024)Description (Translated English): Connections for hydraulic fluid power - Test methods - Part 1: Connectors Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: J20 Classification of International Standard: 23.100.40 Word Count Estimation: 22,269 Date of Issue: 2024-03-15 Date of Implementation: 2024-10-01 Older Standard (superseded by this standard): GB/T 26143-2010 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 7939.1-2024: Connections for hydraulic fluid power - Test methods - Part 1: Connectors---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 23.100.40 CCSJ20 National Standards of People's Republic of China Replace GB/T 26143-2010 Test methods for hydraulic transmission connections Part 1.Pipe fittings Released on 2024-03-15 2024-10-01 Implementation State Administration for Market Regulation The National Standardization Administration issued Table of ContentsPreface III Introduction IV 1 Scope 1 2 Normative references 1 3 Terms and Definitions 2 4 General requirements 2 5 Repeat assembly test 5 6 Air tightness test 6 7 Withstand voltage test 7 8 Explosion test 8 9 Cyclic durability (pulse) test 8 10 Vacuum test 9 11 Overload tightening test 10 12 Vibration test 10 13 Cyclic durability (pulse) test with vibration 12 14 Notes 13 Appendix A (Informative) Typical test data table 14 Reference 17ForewordThis 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 is part 1 of GB/T 7939 "Test methods for hydraulic transmission connections". GB/T 7939 has been published in the following parts. --- Part 1.Pipe fittings; --- Part 2.Quick-change connectors; --- Part 3.Hose assemblies. This document replaces GB/T 26143-2010 "Test methods for hydraulic pipe joints". Compared with GB/T 26143-2010, except for structural adjustment In addition to the integration and editorial changes, the main technical changes are as follows. a) The applicable scope of the standard has been deleted (see Chapter 1 of GB/T 26143-2010); b) Added the compliance standards and working pressure requirements for steel pipes (see Table 1); c) The hardness of the test connection block has been changed (see 4.2.1, 11.2, 4.2.1, 11.2 of GB/T 26143-2010); d) The requirements for recording test results and test conditions have been changed (see 4.4, 4.4 of GB/T 26143-2010); e) Changed some parameter values and test methods of cyclic durability (pulse) test, vibration test, and cyclic durability (pulse) test with vibration. Steps (see Table 6, Table 9, Table 11, Table 6, Table 9, Table 11 of GB/T 26143-2010); f) The properties and test data table in Appendix A have been changed (see Appendix A, Appendix A of GB/T 26143-2010). This document is equivalent to ISO 19879.2021 "Metallic pipe fittings for fluid transmission and general use - pipe connections for hydraulic transmission experiment method". The following minimal editorial changes were made to this document. --- In order to coordinate with the existing standards, the name of the standard is changed to "Hydraulic transmission connection test methods Part 1.Pipe joints"; --- The serial number of the parts is deleted in Table 1 and a note is added; ---Deleted the unit "bar" and the corresponding value; ---9.1 Added notes. Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed by the China Machinery Industry Federation. This document is under the jurisdiction of the National Hydraulic and Pneumatic Standardization Technical Committee (SAC/TC3). This document was drafted by. Xuzhou Xugong Hydraulic Parts Co., Ltd., Jiangsu Yaokun Hydraulic Co., Ltd., Guangzhou Yitai Energy Saving Equipment Co., Ltd. Limited Liability Company, Danfoss Power Systems (Ningbo) Co., Ltd., Xiamen Chengcan Industrial Equipment Co., Ltd., Xingjian Technology Co., Ltd., Ningbo Ningbo Product and Food Quality Inspection Institute (Ningbo Fiber Inspection Institute), Anhui University of Science and Technology, Zhejiang Zhida Pipe Industry Co., Ltd., Shandong Yicheng Hydraulic Equipment Co., Ltd., Beijing Machinery Industry Automation Research Institute Co., Ltd. The main drafters of this document are. Zhang Yichun, Liu Xiaofang, Zhou Feng, Yu Jijian, Zhang Haixin, Zhang Luping, Zheng Zhijian, Pi Fengmei, Guo Chun, Zhou Hui, Yang Xiaochen and Cao Qiaohui. This document was first published as GB/T 26143-2010 in.2010 and this is the first revision.IntroductionIn hydraulic fluid power systems, power is transmitted and controlled by pressurized fluid in a closed circuit. Pipe fittings must be designed to meet In order to determine whether the pipe joints meet the design and use requirements, performance testing of the pipe joints is required. GB/T 7939 specifies the test methods for hydraulic transmission connection elements and consists of three parts. --- Part 1.Pipe joints. The purpose is to determine the test and evaluation methods for the performance of pipe joints used in hydraulic transmission systems. --- Part 2.Quick-change connectors. The purpose is to determine the test and evaluation methods for the performance of quick-change connectors used in hydraulic transmission systems. --- Part 3.Hose assemblies. The purpose is to determine the test and evaluation methods for the performance of hose assemblies used in hydraulic transmission systems. Test methods for hydraulic transmission connections Part 1.Pipe fittings1 ScopeThis document describes the testing and performance evaluation of various types of steel pipe connections, stud end connections and flange connections used in hydraulic transmission. unified approach. The tests described in this document are independent of each other and are the documents that each test follows. For specific test items and performance requirements, see Corresponding standard documents. For the qualification judgment of pipe joints, the minimum number of test samples specified in this document shall be used for testing, unless otherwise specified in the relevant pipe joint standards. Unless otherwise specified or agreed upon between the manufacturer and the user.2 Normative referencesThe contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. ISO 48-2 Rubber, vulcanized or thermoplastic - Determination of hardness - Part 2.Rubber hardness between 10 IRHD and 100 IRHD (Rub- 100IRHD) tion) Note. GB/T 3141-1994 Industrial liquid lubricants ISO viscosity classification (eqvISO 3448.1992) ISO 3601-3 Fluid power systems - O-rings - Part 3.Quality acceptance criteria Note. GB/T 3452.2-2007 O-rings for hydraulic and pneumatic applications Part 2.Appearance quality inspection specification (ISO 3601-3.2005, IDT) Note. GB/T 17446-2024 Fluid power systems and components vocabulary (ISO 5598.2020, MOD) ISO 6508-1 Metallic materials Rockwell hardness test Part 1.Test method (Metallicmaterials-Rockwelhard- nesstest-Part 1.Testmethod) Note. GB/T 230.1-2018 Rockwell hardness test for metallic materials Part 1.Test method (ISO 6508-1.2016, MOD) andhoseassemblies) Note. GB/T 7939.3-2023 Hydraulic transmission connection test methods Part 3.Hose assemblies (ISO 6605.2017, IDT) ISO 6743-4 Lubricants, industrial oils and related products (Class L) Classification Part 4.Group H (Hydraulic systems) draulicsystems)] Note. GB/T 7631.2-2003 Classification of lubricants, industrial oils and related products (Class L) Part 2.Group H (Hydraulic systems) (ISO 6743-4. 1999,IDT) ISO 10763 Hydraulic fluid seamless or welded plain end precision steel tube dimensions and nominal pressures ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 7939.1-2024_English be delivered?Answer: Upon your order, we will start to translate GB/T 7939.1-2024_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. 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Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.Question 5: Should I purchase the latest version GB/T 7939.1-2024?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 7939.1-2024 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
