BS-ISO-8434-2-2007.pdf
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1、BRITISH STANDARD BS ISO 8434-2:2007 Metallic tube connections for fluid power and general use Part 2: 37 flared connectors ICS 23.100.40 ? Licensed Copy: London South Bank University, London South Bank University, Fri Nov 16 07:28:01 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS ISO 8434-2:2007 This
2、 British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 November 2007 BSI 2007 ISBN 978 0 580 55036 2 National foreword This British Standard is the UK implementation of ISO 8434-2:2007. It supersedes BS ISO 8434-2:1994 which is withdrawn. The UK part
3、icipation in its preparation was entrusted by Technical Committee MCE/18, Fluid power systems and components, to Panel MCE/18/-/4, Connectors and associated components. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purpor
4、t to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Amendments issued since publication Amd. No. DateComments Licensed Copy: London South Bank University, London
5、South Bank University, Fri Nov 16 07:28:01 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Reference number ISO 8434-2:2007(E) INTERNATIONAL STANDARD ISO 8434-2 Second edition 2007-09-01 Metallic tube connections for fluid power and general use Part 2: 37 flared connectors Raccordements de tubes mtalliqu
6、es pour transmissions hydrauliques et pneumatiques et applications gnrales Partie 2: Connecteurs vass 37 BS ISO 8434-2:2007 Licensed Copy: London South Bank University, London South Bank University, Fri Nov 16 07:28:01 GMT+00:00 2007, Uncontrolled Copy, (c) BSI ii Licensed Copy: London South Bank Un
7、iversity, London South Bank University, Fri Nov 16 07:28:01 GMT+00:00 2007, Uncontrolled Copy, (c) BSI iii Contents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references. 1 3 Terms and definitions. 3 4 Requirements for materials . 4 5 Pressure/temperature requirements. 5 6 Designation o
8、f connectors 5 7 Requirements for tubes 8 8 Across flats dimensions and tolerances 9 9 Design 10 10 Screw threads . 10 11 Manufacture. 11 12 Assembly instructions . 12 13 Procurement information. 12 14 Marking of components . 12 15 Performance and qualification test. 12 16 Identification statement (
9、reference to this part of ISO 8434). 14 Annex A (normative) Length reduction factors for reducing connectors 42 Bibliography. 50 BS ISO 8434-2:2007 Licensed Copy: London South Bank University, London South Bank University, Fri Nov 16 07:28:01 GMT+00:00 2007, Uncontrolled Copy, (c) BSI iv Foreword IS
10、O (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical co
11、mmittee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electro
12、technical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the me
13、mber bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identif
14、ying any or all such patent rights. ISO 8434-2 was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee SC 4, Connectors and similar products and components. This second edition cancels and replaces the first edition (ISO 8434-2:1994), which has been technically revised. ISO
15、 8434 consists of the following parts, under the general title Metallic tube connections for fluid power and general use: Part 1: 24 cone connectors Part 2: 37 flared connectors Part 3: O-ring face seal connectors Part 4: 24 cone connectors with O-ring weld-on nipple Part 6: 60 cone connectors with
16、or without O-ring sealing BS ISO 8434-2:2007 Licensed Copy: London South Bank University, London South Bank University, Fri Nov 16 07:28:01 GMT+00:00 2007, Uncontrolled Copy, (c) BSI v Introduction In fluid power systems, power is transmitted and controlled through a fluid (liquid or gas) under pres
17、sure within an enclosed circuit. In general applications, a fluid may be conveyed under pressure. Components may be connected through their ports by connections (connectors), tubes and hoses. Tubes are rigid conductors; hoses are flexible conductors. This part of ISO 8434 is based on the US standard
18、 ANSI/SAE J514 1. The threads for the 37 flared connection are unified inch threads in accordance with ISO 263. The inch threads were not changed to metric threads according to ISO 261 to allow connectors complying with this International Standard to be used in existing applications without requirin
19、g a change to tube or hose assemblies. Also, the thread-to-nut overtorque and seal performance have been extensively tested; to change to metric threads would require an extensive test program at considerable cost without providing any functional improvement. The threads are integral to themselves,
20、connectors of this type match only to themselves and, other than having metric threads, no value in changing could be found. Major international companies that have used these connectors have adopted the design without noting any problems. All wrench flats specified in this part of ISO 8434 are dime
21、nsioned to be used with ISO standard metric wrenches. BS ISO 8434-2:2007 Licensed Copy: London South Bank University, London South Bank University, Fri Nov 16 07:28:01 GMT+00:00 2007, Uncontrolled Copy, (c) BSI blank Licensed Copy: London South Bank University, London South Bank University, Fri Nov
22、16 07:28:01 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 1 Metallic tube connections for fluid power and general use Part 2: 37 flared connectors 1 Scope This part of ISO 8434 specifies general and dimensional requirements for the design and performance of 37 flared connectors that are suitable for us
23、e with ferrous and non-ferrous tubes with outside diameters from 6 mm to 50,8 mm, inclusive. These connectors are for use in fluid power and general applications within the limits of pressure and temperature specified in this part of ISO 8434. They are intended for the connection of tubes and hose f
24、ittings to ports in accordance with ISO 6149-1, ISO 1179-1, ISO 9974-1 and ISO 11926-1. (See ISO 12151-5 for related hose fitting specification.) These connectors provide full-flow connections with metal-to-metal sealing in hydraulic systems operating to the working pressures shown in Table 1. Becau
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