1 Scope
This part of GB 25974 specifies the terms and definitions, requirements, test methods, inspection rules, marking, packaging, transportation and storage of powered support for coal mines (hereinafter referred to as "support").
This part is applicable to the support used at environment temperatures from 0 ℃ to 60 ℃.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of GB 25974. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 228 Metallic Materials - Tensile Testing at Ambient Temperature (GB/T 228-2002, eqv ISO 6892:1998)
GB/T 229 Metallic Materials - Charpy Pendulum Impact Test Method (GB/T 229-2007, ISO 148-1:2006, MOD)
GB 3836.1-2000 Explosive Atmospheres - Part 1: Equipment - General Requirements (eqv IEC 60079-0:1998)
GB 9969.1 General Principles for Preparation of Instructions for Use of Industrial Products
GB/T 11352 Carbon Steel Castings for General Engineering Purpose (GB/T 11352-2009, ISO 3755:1991; ISO 4990:2003, MOD)
GB/T 12361 General Specification of Steel Die Forgings
GB/T 12467 (All Parts) Quality Requirements for Fusion Welding of Metallic Materials (GB/T 12467.1 to 12467.5-2009, ISO 3834-1 to 3834-4:2005, IDT)
GB/T 13264-2008 Sampling Procedures and Tables for Small Lot Inspection by Attributes for Percent Nonconforming Items
GB/T 13306 Plates
GB 25974.2 Powered Support for Coal Mine - Part 2:Specification for Power Set Legs and Rams
GB 25974.3 Powered Support for Coal Mine - Part 3: The Hydraulic Control System and Valves
MT 76 Emulsifying Oil Concentrate and High-water Content Hydraulic Fluid Used for Powered Support and Prop
MT/T 98 Inspection Specifications of Hose and Hose Kit for Powered Support
MT/T 587 Manufacturing Technical Specification for Structural Parts of Powered Support
MT/T 986 Quick Adapter with U Pin and Accessories for Mine
3 Terms and Definitions
For the purposes of this part of GB 25974, the following terms and definitions apply.
3.1 Powered support
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 Requirements
4.1 General Requirements
4.2 Appearance Quality
4.3 Operational Performance
4.4 Sealing Performance
4.5 Supporting Performance
4.6 Conformability
4.7 Shrinkage Performance
4.8 Structural Strength
4.9 Durability
4.10 Hydraulic Elements and Components
4.11 Material
4.12 Welding
4.13 Calculation of Permissible Stress and Static Force
5 Test Method
5.1 Test Conditions
5.2 Lift Point
5.3 Appearance Quality
5.4 Operational Performance
5.5 Sealing Performance
5.6 Supporting Performance
5.7 Conformability
5.8 Shrinkage Performance
5.9 Structural Strength
5.10 Durability
5.11 Integration of Hydraulic System and Powered Support
5.12 Material
6 Inspection Rules
6.1 Inspection Classification
6.2 Inspection Item
6.3 Delivery Inspection
6.4 Type Inspection
7 Mark, Package, Transport And Storage
7.1 Mark
7.2 Package, Transport and Storage
Appendix A (Informative) List of Hazards
Appendix B (Informative) Calculation of Permissible Stress and Static Load
Appendix C (Informative) Operating Instruction
