This document specifies the general and dimensional requirements for 24° cone connectors using cutting ring and O-ring seal cone (referred to as DKO) suitable for use with ferrous and non-ferrous tubes with outside diameters from 4 mm to 42 mm inclusive. These connectors are for use in fluid power and general applications within the limits of pressure and temperature specified in this document. They are intended for the connection of plain end tubes and hose fittings to ports in accordance with ISO 6149-1, ISO 1179-1 and ISO 9974-1. (See ISO 12151-2 for a related hose fitting specification.) These connectors provide full-flow connections in hydraulic systems operating to the working pressures shown in Table 1. Because many factors influence the pressure at which a system performs satisfactorily, these values are not intended to be understood as guaranteed minimums. For every application, sufficient testing is meant to be conducted and reviewed by both the user and manufacturer to ensure that required performance levels are met. NOTE 1 For new designs in hydraulic fluid power applications, see the requirements given in 9.6. Where the requirements of the application allow for the use of elastomeric seals, connector designs that conform to International Standards and incorporate elastomeric sealing are preferred. NOTE 2 For use under conditions outside the pressure and/or temperature limits specified, see 5.4. This document also specifies a performance and qualification test for these connectors.
Tämän julkaisun valmistelusta Suomessa vastaa Metalliteollisuuden Standardisointiyhdistys ry, puh. 09 19 231 (vaihde).
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Materials
4.1 General
4.2 Connector bodies
4.3 Nuts
4.4 Cutting rings
4.5 O-rings
5 Pressure/temperature requirements
6 Designation of connectors
7 Requirements for tubes
8 Across‑flats dimensions and tolerances
9 Design
9.1 Connectors
9.2 Dimensions
9.3 Passage tolerances
9.4 Angular tolerances
9.5 Contour details
9.6 Ports and stud ends
9.7 Stud end sealing
10 Screw threads
10.1 Cone ends and nuts
10.2 Stud ends (connection ends)
11 Manufacture
11.1 Construction
11.2 Workmanship
11.3 Finish
11.4 Corners
12 Assembly instruction
13 Procurement information
14 Marking of components
15 Performance and qualification test
15.1 General
15.2 Repeated assembly test
15.3 Proof test
15.4 Burst pressure test
15.5 Cyclic endurance (impulse) test
15.6 Vibration test
15.7 Leakage (gas) test
15.8 Overtightening test
15.9 Vacuum test
16 Identification statement (reference to this document)
Annex A Assembly instructions for 24° cone connectors using cutting ring conforming to ISO 8434-1 (normative)
ISO 1127:1992 Stainless steel tubes -- Dimensions, tolerances and conventional masses per unit length
ISO 1179-1:2013 Connections for general use and fluid power -- Ports and stud ends with ISO 228-1 threads with elastomeric or metal-to-metal sealing -- Part 1: Threaded ports
ISO 1179-2:2013 Connections for general use and fluid power -- Ports and stud ends with ISO 228-1 threads with elastomeric or metal-to-metal sealing -- Part 2: Heavy-duty (S series) and light-duty (L series) stud ends with elastomeric sealing (type E)
ISO 1127:1992 Stainless steel tubes -- Dimensions, tolerances and conventional masses per unit length
ISO 1179-1:2013 Connections for general use and fluid power -- Ports and stud ends with ISO 228-1 threads with elastomeric or metal-to-metal sealing -- Part 1: Threaded ports
ISO 1179-2:2013 Connections for general use and fluid power -- Ports and stud ends with ISO 228-1 threads with elastomeric or metal-to-metal sealing -- Part 2: Heavy-duty (S series) and light-duty (L series) stud ends with elastomeric sealing (type E)
ISO 1179-4:2007 Connections for general use and fluid power -- Ports and stud ends with ISO 228-1 threads with elastomeric or metal-to-metal sealing -- Part 4: Stud ends for general use only with metal-to-metal sealing (type B)
ISO 19879:2010 Metallic tube connections for fluid power and general use -- Test methods for hydraulic fluid power connections
ISO 228-1:2000 Pipe threads where pressure-tight joints are not made on the threads -- Part 1: Dimensions, tolerances and designation
ISO 3304:1985 Plain end seamless precision steel tubes -- Technical conditions for delivery
ISO 3305:1985 Plain end welded precision steel tubes -- Technical conditions for delivery
ISO 3601-3:2005 Fluid power systems -- O-rings -- Part 3: Quality acceptance criteria
ISO 4759-1:2000 Tolerances for fasteners -- Part 1: Bolts, screws, studs and nuts -- Product grades A, B and C
ISO 48:2010 Rubber, vulcanized or thermoplastic -- Determination of hardness (hardness between 10 IRHD and 100 IRHD)
ISO 5598:2008 Fluid power systems and components -- Vocabulary
ISO 6149-1:2006 Connections for hydraulic fluid power and general use -- Ports and stud ends with ISO 261 metric threads and O-ring sealing -- Part 1: Ports with truncated housing for O-ring seal
ISO 6149-2:2006 Connections for hydraulic fluid power and general use -- Ports and stud ends with ISO 261 metric threads and O-ring sealing -- Part 2: Dimensions, design, test methods and requirements for heavy-duty (S series) stud ends
ISO 6149-3:2006 Connections for hydraulic fluid power and general use -- Ports and stud ends with ISO 261 metric threads and O-ring sealing -- Part 3: Dimensions, design, test methods and requirements for light-duty (L series) stud ends
ISO 724:1993 ISO general-purpose metric screw threads -- Basic dimensions
ISO 9227:2017 Corrosion tests in artificial atmospheres -- Salt spray tests
ISO 965-1:2013 ISO general purpose metric screw threads -- Tolerances -- Part 1: Principles and basic data
ISO 9974-1:1996 Connections for general use and fluid power -- Ports and stud ends with ISO 261 threads with elastomeric or metal-to-metal sealing -- Part 1: Threaded ports
ISO 9974-2:1996 Connections for general use and fluid power -- Ports and stud ends with ISO 261 threads with elastomeric or metal-to-metal sealing -- Part 2: Stud ends with elastomeric sealing (type E)
ISO 9974-3:1996 Connections for general use and fluid power -- Ports and stud ends with ISO 261 threads with elastomeric or metal-to-metal sealing -- Part 3: Stud ends with metal-to-metal sealing (type B)