BS ISO 9679-2006 Aerospace Clamps for fluid systems Test methods《航空航天 流体系统用夹具 试验方法》.pdf
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1、BRITISH STANDARD BS ISO 9679:2006 Aerospace Clamps for fluid systems Test methods ICS 49.080 BS ISO 9679:2006 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 October 2006 BSI 2006 ISBN 0 580 49323 7 National foreword This British Standard
2、was published by BSI. It is the UK implementation of ISO 9679:2006. The UK participation in its preparation was entrusted to Technical Committee ACE/69, Aerospace hydraulic systems, fluids and components. A list of organizations represented on ACE/69 can be obtained on request to its secretary. This
3、 publication does not purport 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. Date CommentsINTERNATIONAL STANDARD I
4、SO 9679 First edition 2006-08-15 Reference number ISO 9679:2006(E) Aerospace Clamps for fluid systems Test methods Aronautique et espace Colliers pour systmes de fluides Mthodes dessaiBS ISO 9679:2006ii iii Foreword ISO (the International Organization for Standardization) is a worldwide federation o
5、f 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 committee has been established has the right to be represented on that committee. In
6、ternational 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 electrotechnical standardization. International Standards are drafted in accordance with
7、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 member bodies for voting. Publication as an International Standard requires approval
8、 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 identifying any or all such patent rights. ISO 9679 was prepared by Technical Committee I
9、SO/TC 20, Aircraft and space vehicles, Subcommittee SC 10, Aerospace fluid systems and components. BS ISO 9679:2006blank1 Aerospace Clamps for fluid systems Test methods 1S c o p e This International Standard specifies the test methods and procedures to be used for the qualification and comparison o
10、f support or retention devices used in the installation of aerospace fluid systems. It is applicable when reference is made to parts standards, procurement specifications, or other definition documents. 2 Normative references The following referenced documents are indispensable for the application o
11、f this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 1431-1:2004, Rubber, vulcanized or thermoplastic Resistance to ozone cracking Part 1: Static and dynamic strain testing
12、 ISO 2951, Vulcanized rubber Determination of insulation resistance ISO 4892-3, Plastics Methods of exposure to laboratory light sources Part 3: Fluorescent UV lamps 3 General requirements 3.1 The tests required by this specification relate only to the qualification of the device. They do not infer
13、qualification of the service, installation or techniques used. All devices tested shall be in conformance with the applicable parts standard or development criteria. 3.2 Unless otherwise specified, all tests should be conducted at room temperature . 4 Material tests 4.1 General All materials used sh
14、all be in conformance with the specifications specified in the applicable parts standard. In addition, the following tests may be required by the parts standard, procurement specification or contract. 4.2 Ozone resistance All non-metallic materials, vulcanized or thermoplastic, shall be free of crac
15、king when tested in accordance with ISO 1431-1:2004, procurement B, at a volume fraction of ozone of , under an strain for , and at a temperature of . (25 10) C 6 10 6 80 % 6h (40 2) C BS ISO 9679:20062 4.3 Flame resistance 4.3.1 General All non-metallic materials shall be tested for flammability by
16、 means of a vertical burn test, as specified in this subclause. The flame source shall be a Bunsen Burner or a similar burner, having a normal diameter of ( ). The burner shall be adjusted to provide a ( ) high flame of blue intensity. Verify flame temperature to be minimum of at the centre of the f
17、lame, by use of thermocouple. 4.3.2 Test specimens Specimens shall be actual components mounted in an “as used” condition as close as possible to their use in an aircraft. All test specimens shall include the necessary mounting hardware and tubing. See Figure 1 for examples. 4.3.3 Preconditioning Al
18、l specimens shall be preconditioned at to at relative humidity for a period of prior to testing. 4.3.4 Test Remove specimens, one at a time, from the preconditioning chamber immediately before performing the test. Position the specimens above the burner so the flame strikes the specimen at approxima
19、tely . Apply the flame for and remove. The average burn time of three specimens after removal of the flame shall not exceed . Dripping from the burning specimens shall not burn for more than after dropping. 4.4 Insulation properties If necessary for a particular installation, the insulation value of
20、 vulcanized rubber shall be determined by referring to ISO 2951. 4.5 Ultraviolet resistance Various plastic and organic elastomer materials exposed to sunlight and some electrical applications can be susceptible to ultraviolet attack. When these types of material are used on exterior applications, t
21、hey should be tested in accordance with ISO 4892-3. 4.6 Titanium compatibility 4.6.1 Principle Where clamping devices are employed to support titanium tube installations, the sheathing or other materials in direct contact with the tubing shall be tested to determine if they have any chemical effect
22、on the tubing. 4.6.2 Test methods Mount five size-25 ( ) clamps on a length of titanium alloy tubing, material type Ti-3Al2,5V, with no spacers between the test samples. The tubing, with the clamps mounted, shall be filled with hydraulic fluid and exposed to the clamping devices maximum rated servic
23、e temperature for . Pressure in the tube shall be maintained at ( ) during the exposure. The test apparatus shall be removed and placed in an atmosphere of and relative humidity for . There shall be no evidence of cracking or pitting of the titanium tube specimen when observed with a five to ten pow
24、er magnifying glass. 10 mm 0,40 in 38 mm 1,52 in 849 C 20 C 25 C (50 5) % 24 h 19 mm 90 12 s 15 s 5s 1in 12 d 21 000 kPa 3 000 psi 12 d 70 C 95 % 20 d BS ISO 9679:20063 Dimensions in millimetres (Dimensions in inches) a) Clamp block b) Clamp, loop style Figure 1 Flame resistance test set-up BS ISO 9
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