This standard specifies the technical requirements of 24° cone connectors, e.g. materials, pressure-temperature requirements, marking method, requirements for connected pipe, dimensions and tolerances of wrench, structure and fabrication, performance and test requirements, installation instructions, purchasing information and sign, etc..
This standard is applicable to the pipeline system for hydraulic fluid power and general use, with pipe outside diameter of 4 mm~42 mm and maximum working pressure of 10 MPa~63 MPa.
Note 1: In the newly-designed hydraulic fluid power system, Type F thread stud end shall be adopted.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding corrections 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 3 Run-outs, Undercuts and Chamfers for General Purpose Metric Screw Threads (GB/T 3-1997, eqv ISO 4755: 1983; eqv ISO 3508: 1976)
GB/T 193 General Purpose Metric Screw Threads - General Plan (GB/T 193-2003, ISO 261: 1998, ISO General Purpose Metric Screw Threads-General Plan, MOD)
GB/T 197 General Purpose Metric Screw Threads-Tolerances (GB/T 197-2003, ISO 965-1: 1998, ISO General Purpose Metric Screw Threads-Tolerances-Part 1: Principles and Basic Data, MOD)
GB/T 230.1 Metallic Rockwell Hardness Test-Part 1: Test Method (Scales A, B, C, D, E, F, G, H, K, N, T) (GB/T 230.1-2004, ISO 6508-1: 1999, MOD)
GB/T 3103.1 Tolerances for Fasteners - Bolts, Screws and Nuts (GB/T 3103.1-2002, idt ISO 4759-1: 2000)
GB/T 3141 Industrial Liquid Lubricants-ISO Viscosity Classification (GB/T 3141-1994, eqv ISO 3448: 1992)
GB/T 3452.2 Fluid Power Systems-O-rings-Part 2: Quality Acceptance Criteria (GB/T 3452.2-2007, ISO 3601-3: 2005, IDT)
GB/T 3639 Seamless Cold-drawn or Cold-rolled Steel Tubes for Precision Applications (neq DIN 2391/1-1994 and DIN 2391/2-1994)
GB/T 5649 Flared Couplings - Lock Nut and Lockup Washer
GB/T 6031 Rubber, Vulcanized or Thermoplastic-Determination of Hardness (Hardness between 10 IRHD and 100 IRHD) (GB/T 6031-1998, idt ISO 48: 1994)
GB/T 7306.1 Pipe Threads with 55 Degree Thread Angle Where Pressure-tight Joints Are Made on the Threads - Part 1: Parallel Internal and Taper External Threads (GB/T 7306.1-2000, eqv ISO 7-1: 1994)
GB/T 7306.2 Pipe Threads with 55 Degree Thread Angle Where Pressure-tight Joints Are Made on the Threads-Part 2: Taper Internal and External Threads (GB/T 7306.2-2000, eqv ISO 7-1: 1994)
GB/T 7307 Pipe Threads with 55 Degree Thread Angle where Pressure-tight Joints are Made on the Threads (GB/T 7307-2001, eqv ISO 228-1: 1994)
GB/T 7631.2 Lubricants, Industrial Oils and Related Products (Class L)-Classification - Part 2: Family H (Hydraulic Systems) (GB/T 7631.2-2003, ISO 6743-4: 1999, IDT)
GB/T 12716 Pipe Threads with the Thread Angle of 60 Degrees Where Pressure-tight Joints Are Made on Threads (GB/T 12716-2002, ASME Bl.20.1: 1992, MOD)
GB/T 17446 Fluid Power Systems and Components C Vocabulary (GB/T 17446-1998, idt ISO 5598: 1985)
GB/T 19674.2 Connections for General Use and Fluid Power-Ports and Stud Ends with Thread-Stud Ends with Elastomeric Sealing (Type A and Type E)
GB/T 19674.3 Connections for General Use and Fluid Power-Ports and Stud Ends with Thread-Stud Ends With Metal-to-metal Sealing (Type B) (GB/T 19674.3-2005, ISO 9974-3: 1996 , IDT)
ISO 1127 Stainless Steel Tubes - Dimensions, Tolerances and Conventional Masses Per Unit Length
