Source: http://codeofchina.com/standard/GB25974.3-2010.html
Timestamp: 2020-02-23 19:09:01
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GB 25974.3-2010 English Version, GB 25974.3-2010 Powered support for coal mine—Part 3:The hydraulic control system and valves (English Version) - Code of China
Position: Chinese Standard in English/GB 25974.3-2010
GB 25974.3-2010 Powered support for coal mine—Part 3:The hydraulic control system and valves (English Version)
Standard No.: GB 25974.3-2010 Status: valid remind me the status change
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Detail of GB 25974.3-2010
Introduction of GB 25974.3-2010
Contents of GB 25974.3-2010
Standard No.: GB 25974.3-2010
English Name: Powered support for coal mine—Part 3:The hydraulic control system and valves
Chinese Name: 煤矿用液压支架　第3部分：液压控制系统及阀
Chinese Classification: D97 Mine support equipment
1 Scope This part of GB 25974 specifies the terms and definitions, classification, requirements, test methods, inspection rules, marking, packaging and storage for hydraulic control system and valves of powered support for coal mine (hereinafter referred to as support). This part is applicable to various supports for coal mine and other hydraulic control system and valves with supporting equipment, including various hydraulic control systems, yield valves, pilot check valves, directional valves and shut-off valves. This part is not applicable to valves in pressurizer, power set legs and ram (i.e. foot valve of power set legs). 2 Normative References The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. For dated references, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties entering into agreement according to this standard are encouraged to research whether the latest editions of these references apply. For undated references, their latest editions are applicable to this standard. GB/T 197-2003 General Purpose Metric Screw Threads - Tolerances (ISO 965-1: 1998, MOD) GB/T 321-2005 Preferred Numbers - Series of Preferred Numbers (ISO 3: 1973, IDT) GB/T 699 Quality Carbon Structural Steels GB/T 1184-1996 Tolerance of Shape and Position - Unnoted Tolerance (eqv ISO 2768-2: 1989) GB/T 1220 Stainless Steel Bars GB/T 1239.1 Cold Coiled Helical Springs Technical Specifications - Part 1: Extension Spring GB/T 1239.2 Cold Coiled Helical Springs Technical Specifications - Part 2: Compressions Spring GB/T 1239.3 Cold Coiled Helical Springs Technical Specifications - Part 3: Torsion Spring GB/T 1239.4 Hot Coiled Helical Springs - Technical Specifications GB/T 1800.1-2009 Geometrical Product Specifications (GPS) - Limits and Fits - Part 1: Bases of Tolerances, Deviations and Fits (ISO 286-1: 1988, MOD) GB/T 1804-2000 General Tolerances - Tolerances for Linear and Angular Dimensions without Individual Tolerance Indications (eqv ISO 2768-1: 1989) GB/T 2828.1-2003 Sampling Procedures for Inspection by Attributes - Part 1: Sampling Schemes Indexed by Acceptance Quality Limit (AQL) for Lot-by-Lot Inspection (ISO 2859-1: 1999, IDT) GB/T 2829-2002 Sampling Procedures and Tables for Periodic Inspection by Attributes (Applicable to Inspection of Stability for Productive Process) GB/T 3452.1 Liquid Power Systems - O-Rings - Part 1: Inside Diameters, Cross-Sections, Tolerances and Size Identification Code (GB/T 3452.1-2005, ISO 3601-1: 2002, MOD)
Foreword	I Introduction	II 1 Scope 2 Normative References 3 Terms and Definitions 4 Classification 4.1 Product Classification 4.2 Product Model 5 Requirements 5.1 General Requirements 5.2 Requirements of Hydraulic Control System 5.3 Requirements of Valves 6 Test Methods 6.1 Testing Condition 6.2 Test Methods for Hydraulic Control System 6.3 Manufacturing Quality of Parts 6.4 Test Methods for Yield Valve 6.5 Test Methods for Pilot Check Valve 6.6 Test Methods for Directional Valve 6.7 Test Methods for Shut-off Valves 6.8 Testing Methods for Other Valves 7 Inspection Rules 7.1 Inspection Classification 7.2 Inspection Items 7.3 Batching Rules and Sampling Scheme 7.4 Sampling Method 7.5 Distinguishing Rules 8 Marking, Packaging and Storage Appendix A (Normative) Technical Requirements for Coatings of Valve Parts
* GB/T 321-2005 Preferred numbers -Series of preferred numbers
* GB/T 1239.1-2009 Cold Coiled Helical Springs Technical Specifications-Part 1: Extension Spring
* GB/T 1239.3-2009 Cold coiled helical springs technical specifiations - Part 3: Torsion spring
* GB/T 2829-2002Sampling
* GB/T 3452.3-2005 Housing dimensions for O - ring elastomer seals in hydraulic and pneumatic applications
* GB/T 9799-2011 Metallic and other inorganic coatings—Electroplated coatings of zinc with supplementary treatments on iron or steel
* JB/T 3338.1-1993 Cylindrical Helical Compression Springs for Hydraulic Parts Technical Conditions
* MT 76-2011 Emulsifying Oil, Concentrate Fluid and High Water Content Hydraulic Fluid Used for Powered Support
* MT/T 986-2006 Quick adapter with U pin and accessories for mine
Referred in GB 25974.3-2010:
GB 25974.3-2010 is referred in:
* GB 25974.1-2010 Powered support for coal mine—Part 1:General specification
*MT/T 1166-2019 The auto-moving retarn end for extensible belt convyor
Standard No. GB 25974.3-2010
Powered support for coal mine—Part 3:The hydraulic control system and valves
煤矿用液压支架　第3部分：液压控制系统及阀
GB 25974.3-2010, GB/T 25974.3-2010, GBT 25974.3-2010, GB25974.3-2010, GB 25974.3, GB25974.3, GB/T25974.3-2010, GB/T 25974.3, GB/T25974.3, GBT25974.3-2010, GBT 25974.3, GBT25974.3