GB 25974.3-2010 (English Version) PDF

Standard No.: GB 25974.3-2010
Language: Chinese, Available in English version
Release Date: 2011
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB 25974.3-2010

Scope: This part of GB 25974 specifies the terms and definitions, requirements, test methods, inspection rules, signs, packaging, transportation and storage of hydraulic control systems and valves for coal mine hydraulic supports. This part is applicable to hydraulic control systems and valves of various coal mine supports and other equipment with support functions, including various hydraulic control systems, safety valves, hydraulic control check valves, reversing valves, globe valves, etc. . This section does not apply to valves inside boosters, columns and jacks (such as column bottom valves).

GB 25974.3-2010 Referenced Document

GB 25974.3 Powered support for coal mine.Part 3:The hydraulic control system and valves
GB/T 11352 Carbon steel castings for general engineering purpose
GB/T 1184-1996 Geometrical tolerancing--Geometrical tolerance for features without individual tolerance indications
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 1800 General Tolerance and Fit Standard Tolerance and Basic Deviation
GB/T 1804 General tolerances Tolerances for linear and angular dimensions without individual tolerance indications
GB/T 197 General purpose metric screw threads—Tolerances*， 2018-03-15 Update
GB/T 2828 Batch-by-batch inspection counting sampling procedure and sampling table (applicable to continuous batch inspection)
GB/T 2829 Sampling procedures and tables for periodic inspection by attributes (Apply to inspection of process stability)
GB/T 321 Preferred numbers-Series of preferred numbers
GB/T 699 Quality carbon structure steels*， 2015-12-10 Update
GB/T 9439 Gray cast iron parts*， 2023-09-07 Update
GB/T 9799 Metallic and other inorganic coatings.Electroplated coatings of zinc with supplementary treatments on iron or steel *， 2011-12-30 Update

2011 GB 25974.3-2010 Powered support for coal mine.Part 3:The hydraulic control system and valves