MT/T 776-2004 in English

Specification for Routine Inspection of Coal Mining Machine-Hydraulic System Assembly
1 Scope
This standard specifies the technical requirements of the routine inspection, test methods, inspection rules, marking, packaging and transportation of coal mining machine-hydraulic system assembly.
This standard is applicable to the routine inspection of coal mining machine-hydraulic system assembly with hydraulic oil as working medium and the working pressure not greater than 31.5 MPa.
2 Normative References
The following documents contain provisions which, through reference in this standard, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies.
GB/T 3766-2001 Hydraulic fluid power-general rules relating to systems (eqv ISO 4413:1998)
GB 3836.1-2000 Electrical apparatus for explosive gas atmospheres--Part 1: General requirements (eqv IEC 60079-0:1998)
GB/T 14039-2002 Hydraulic fluid power--Fluids--Method for coding the level of contamination by solid particles (ISO 4406:1999, MOD)
GB/T 17489-1998 Hydraulic fluid power--Particulate contamination analysis--Extraction of fluid samples from lines of an operation system (idt ISO 4021:1992)
MT/T 459-1995 Coal mining machine hydraulic fluid power-General rules relating to hydraulic components
ISO 4407:2002 Hydraulic fluid power--Fluid contamination--Determination of particulate contamination by the counting method using an optical microscope
ISO 11500:1997 Hydraulic fluid power--Determination of the particulate contamination level of a liquid sample by automatic particle counting using the light-extinction principle
3 Technical Requirements

Contents
Foreword
1 Scope
2 Normative References
3 Technical Requirements
4 Test Methods
5 Inspection Rules
6 Marking, Packaging, and Transportation