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GB/T 7939.3-2023: Connections for hydraulic fluid power - Test methods - Part 3: Hose assemblies
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| GB/T 7939.3-2023 | English | 314 |
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Connections for hydraulic fluid power - Test methods - Part 3: Hose assemblies
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GB/T 7939.3-2023
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Basic data | Standard ID | GB/T 7939.3-2023 (GB/T7939.3-2023) | | Description (Translated English) | Connections for hydraulic fluid power - Test methods - Part 3: Hose assemblies | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J20 | | Classification of International Standard | 23.100.40 | | Word Count Estimation | 16,189 | | Date of Issue | 2023-05-23 | | Date of Implementation | 2023-12-01 | | Older Standard (superseded by this standard) | GB/T 7939-2008 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 7939.3-2023: Connections for hydraulic fluid power - Test methods - Part 3: Hose assemblies---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
Replacing GB/T 7939-2008
Test method for hydraulic transmission connections
Part 3: Hose assembly
hose assemblies, IDT)
Released on 2023-05-23
2023-12-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Management Committee
table of contents
Preface III
Introduction IV
1 Scope 1
2 Normative references 1
3 Terms and Definitions 2
4 Visual inspection 2
5 Test item 2
6 Acceptance criteria 8
7 Labeling instructions 8
Reference 9
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 is part 3 of GB/T 7939 "Test Methods for Hydraulic Transmission Connections": GB/T 7939 has issued the following parts:
--- Part 3: Hose assembly:
This document replaces GB/T 7939-2008 "Test methods for hydraulic hose assemblies": Compared with GB/T 7939-2008, except for structural adjustment
In addition to rectification and editorial changes, the main technical changes are as follows:
a) In the terms and definitions, "cycle durability (pulse) test" (see 3:3) is added, and "maximum working pressure" and "proof pressure" are deleted
"Pulse" (see 3:1, 3:3, 3:5 of the:2008 edition), changed the "length change" and "minimum burst pressure" (see 3:1, 3:2,
3:2, 3:4 of the:2008 edition);
b) In the cycle durability (pulse) test, the low-pressure test is added (see 5:6:2:5, 5:6:2:6, Figure 3);
c) Changed the test pressure cycle diagram of the cyclic durability (pulse) test (see Figure 2, Figure 3, Figure 2 of the:2008 edition);
d) Added "adhesive strength test" (see 5:8):
This document is equivalent to ISO 6605:2017 "Test methods for fluid transmission hoses and hose assemblies":
The following minimal editorial changes have been made to this document:
--- In order to coordinate with existing standards, change the name of the standard to "Hydraulic Transmission Connection Test Method Part 3: Hose Assembly":
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 Hydraulic Pneumatic Standardization Technical Committee (SAC/TC3):
This document was drafted by: Ningbo Institute of Product and Food Quality Inspection (Ningbo Fiber Inspection Institute), Zhejiang Songqiao Pneumatic Hydraulic Co:, Ltd:
Division, Ningbo Jiurong Hydraulic Equipment Co:, Ltd:, Eaton Hydraulics (Ningbo) Co:, Ltd:, Ningbo Hengtong Fluid Power Technology Co:, Ltd:, Ningbo Xingjian
Aerospace Machinery Co:, Ltd:, Tianjin Jingyan Construction Machinery Transmission Co:, Ltd:, Beijing Machinery Industry Automation Research Institute Co:, Ltd:
The main drafters of this document: Wang Yangding, Zheng Zhijian, Lou Zhongyu, Chen Ke, Yu Jijian, Yu Yabo, Li Yi, Feng Guoxun, Cao Qiaohui:
This document was first released in 1987, revised for the first time in:2008, and this is the second revision:
Introduction
In a hydraulic fluid power system, power is transmitted and controlled through a pressurized fluid in a closed circuit: The hose assembly is a flexible
A flexible fluid conduit is composed of a certain length of hose and pipe joints crimped at both ends:
GB/T 7939 specifies the test methods for hydraulic transmission connecting components, and is intended to be composed of three parts:
--- Part 1: Fittings: The purpose is to determine the test and evaluation methods for the performance of pipe joints used in hydraulic transmission systems (now
GB/T 26143-2010):
--- Part 2: Quick couplings: The purpose is to determine the test and evaluation methods for the performance of quick-change couplings used in hydraulic transmission systems:
--- Part 3: Hose assembly: The purpose is to define methods of testing and evaluating the performance of hose assemblies for use in hydraulic power transmission systems:
Test method for hydraulic transmission connections
Part 3: Hose assembly
1 Scope
This document specifies test methods for evaluating the performance of hose assemblies in hydraulic power connections:
This document is applicable to the testing and performance evaluation of hoses and hose assemblies according to relevant technical requirements:
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:
assemblies-Hydrostatic testing)
Note: GB/T 5563-2013 Rubber and plastic hoses and hose assemblies hydrostatic test methods (ISO 1402:2009, IDT)
tion)
Note: GB/T 3141-1994 Industrial Liquid Lubricants ISO Viscosity Classification (eqvISO 3448:1992)
ISO 4671 Rubber and plastics hoses and hose assemblies, methods of measuring hose dimensions and lengths of hose assemblies (Rubberand
Note: GB/T 9573-2013 Rubber and plastic hoses and hose assemblies, hose dimensions and hose assembly length measurement methods (ISO 4671:2007,
IDT)
Note: GB/T 17446-2012 Fluid Power System and Component Vocabulary (ISO 5598:2008, IDT)
ISO 5893 Technical requirements for rubber and plastics testing equipment in tension, flexion and compression (constant speed movement) [Rubberandplastics
Note: GB/T 25270-2010 Tensile, flex and compression test equipment (constant speed moving type) technical requirements for rubber and plastics (ISO 5893:2002, IDT)
ISO 6133 Multimodal curve analysis in the determination of tear strength and adhesive strength of rubber and plastics (Rubberandplastics-
Note: GB/T 12833-2006 Multimodal Curve Analysis in Determination of Tear Strength and Adhesive Strength of Rubber and Plastics (ISO 6133:1998, IDT)
Note: GB/T 14905-2020 Determination of adhesive strength between layers of rubber and plastic hoses (ISO 8033:2016, IDT)
ISO /T R11340 Rubber and rubber products hydraulic hose assemblies hydraulic system external leakage classification (Rubberandrubber
Note: GB /Z 18427-2001 hydraulic hose assembly hydraulic system external leakage classification (idtISO /T R11340:1994)
ISO /T S17165-2 Hydraulic transmission hose assembly Part 2: Specifications for hydraulic hose assembly (Hydraulicfluid
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