1 Scope
This standard specifies the type dimension and designation, technical requirements, inspection methods, inspection rules, marking, packaging, transportation and storage of cut-out cock for EMU/DMU (hereinafter referred to as cut-out cock).
This standard is applicable to cut-out cock with nominal pressure less than or equal to 1,000kPa for EMU/DMU.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated reference, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 1184-1996 Geometrical Tolerances for Features without Individual Tolerance Indications (eqv ISO 2768-2:1989)
GB/T 1804-2000 General Tolerances - Tolerances for Linear and Angular Dimensions without Individual Tolerance Indications (eqv ISO 2768-1:1989)
GB/T 4208-2008 Degrees of Protection Provided by Enclosure (IP Code) (IEC 60529:2001, IDT)
CB/T 6414 Castings - System of Dimensional Tolerances and Machining Allowances (GB/T 6414-1999, eqv ISO 8062:1994)
GB/T 7306.2-2000 Pipe Threads with 55 Degree Thread Angle Where Pressure-tight Joints are Made on the Threads - Part 2: Taper Internal and External Threads (eqv ISO 7-1:1994)
GB/T 7307 Pipe Threads with 55 Degree Thread Angle Where Pressure-tight Joints are Not Made on the Threads (GB/T 7307-2001, eqv ISO 228-1:1994)
GB/T 10125-1997 Corrosion Tests in Artificial Atmospheres - Salt Spray Tests (eqv ISO 9227:1990)
CB/T 21413.1-2008 Railway Applications - Electric Equipment for Rolling Stock - Part 1: General Service Conditions and General Rules (IEC 60077-1:1999, IDT)
GB/T 21563-2008 Railway Applications - Rolling Stock Equipment - Shock and Vibration Tests(IEC 61373:1999, IDT)
HG/T 2903-1997 Finely Granular Polytetrafluoroethylene Resin Used for Molding
TB/T 3217-2009 Semi-spherical Angle Cock for Locomotive
TB/T 3218-2009 Air Brake Fitting Guard for Railway Rolling Stock
Foreword i
1 Scope
2 Normative References
3 Type Dimension and Designation
3.1 Type Dimension
3.2 Designation
4 Technical Requirements
4.1 General Requirements
4.2 Material Requirements
4.3 Requirements of Manufacture and Assembling
4.4 Performance Requirements
5 Inspection Methods
5.1 Appearance and Dimension Inspection
5.2 Hydraulic Pressure Strength Test
5.3 Torque Test
5.4 Air-tightness Test
5.5 Vibration and Shock Test
5.6 Salt Spray Test
5.7 Electrical Performance Test
5.8 Insulation and Voltage Resistance Test
5.9 Protection Degree Test
6 Inspection Rules
6.1 Type Inspection
6.2 End-of-manufacturing Inspection
7 Marking, Packaging, Transportation and Storage
Annex A (Normative) Type Dimension and Designation of Cut-out Cock for EMU/DMU