1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58specificationICS 49.030.99Aerospace P (loop style) clamps Procurement BRITISH STANDARDBS ISO 12319:
2、2006BS ISO 12319:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 November 2006 BSI 2006ISBN 0 580 49629 5Amendments issued since publicationAmd. No. Date Commentscontract. Users are responsible for its correct application. Compliance w
3、ith a British Standard cannot confer immunity from legal obligations.National forewordThis British Standard was published by BSI. It is the UK implementation of ISO 12319:2006. The UK participation in its preparation was entrusted to Technical Committee ACE/69, Aerospace hydraulic systems, fluids an
4、d components.A list of organizations represented on ACE/69 can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a Reference numberISO 12319:2006(E)INTERNATIONAL STANDARD ISO12319First edition2006-09-15Aerospace P (loop style) clamps
5、 Procurement specification Aronautique et espace Colliers en P (en boucle) Spcification dapprovisionnement BS ISO 12319:2006ii iiiContents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 1 4 Requirements 2 4.1 Qualification 2 4.2 Materials 3 4.3 Config
6、uration 3 4.4 Dimensional requirements. 3 4.5 Mass . 3 4.6 Surface appearance 3 4.7 Surface treatment . 3 4.8 Marking 3 4.9 Vibration and transmissibility . 3 4.10 Retention . 3 4.11 Titanium compatibility 4 4.12 Flame resistance. 4 4.13 Ozone resistance 4 4.14 Ultraviolet resistance 4 4.15 Insulati
7、on properties 4 5 Quality assurance. 4 5.1 Responsibility for inspection 4 5.2 Classification of inspection . 4 5.3 Qualification inspection . 4 5.4 Acceptance inspection. 7 6 Packaging 7 7 Certification . 7 Annex A (normative) Equivalent national qualification procedure. 8 BS ISO 12319:2006iv Forew
8、ord ISO (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 techni
9、cal committee 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 e
10、lectrotechnical 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
11、the member 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 i
12、dentifying any or all such patent rights. ISO 12319 was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee SC 10, Aerospace fluid systems and components. BS ISO 12319:2006vIntroduction This International Standard establishes the basic performance and quality require
13、ments for P (loop style) clamps for use in aerospace fluid systems. The procurement requirements are intended to ensure that clamps which are procured in accordance with this specification are of the same quality as the clamps used during the original qualification testing. Compliance with these tes
14、t and procurement requirements is necessary for clamps that are used in fluid systems where a malfunction would affect the safety of flight. BS ISO 12319:2006blank1Aerospace P (loop style) clamps Procurement specification 1 Scope This International Standard specifies the requirements for the procure
15、ment and quality assurance of P (loop style) clamps used in the installation of aerospace fluid systems. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the
16、 latest edition of the referenced document (including any amendments) applies. ISO 2859-1, Sampling procedures for inspection by attributes Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection ISO 2951, Vulcanized rubber Determination of insulation resistance
17、ISO 4892-3, Plastics Methods of exposure to laboratory light sources Part 3: Fluorescent UV lamps ISO 9679, Aerospace Clamps for fluid systems Test methods EN 9100, Aerospace series Quality management systems Requirements (based on ISO 9001:2000) and quality systems Model for quality assurance in de
18、sign, development, production, installation and servicing (based on ISO 9001:1994) EN 9133, Aerospace series Quality management systems Qualification procedure for aerospace standard parts 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 inspe
19、ction lot clamps from a single production batch having the same number of definition document 3.2 definition document document specifying directly all the requirements for clamps NOTE The definition document may be an International Standard, an in-house standard or a drawing. BS ISO 12319:20062 3.3
20、acceptance quality level AQL maximum percent defective (or the maximum number of defects per hundred units) that, for the purpose of sampling inspection, can be considered satisfactory as a process average NOTE It can also be the quality level which in a sampling plan corresponds to a specified but
21、relatively high probability of acceptance. 3.4 burr raised sharp edge, frequently with a wane on the opposite side ISO 8785:1998 3.5 foreign material extraneous matter on the surface of the clamp or in the surface of the cushion EXAMPLES Contamination, dirt, slivers. 3.6 simple random sampling sampl
22、ing of n items from a population of N items in such a way that all possible combinations of n items have the same probability of being chosen 3.7 major defect defect, other than critical, that is likely to result in a failure or to reduce materially the usability of the considered product for its in
23、tended purpose 3.8 minor defect defect that is not likely to reduce materially the usability of the considered product for its intended purpose, or that represents a departure from established specification having little bearing on the effective use or operation of this product 4 Requirements 4.1 Qu
24、alification 4.1.1 General Clamps supplied in accordance with this International Standard shall be representative of products which have been subjected to and which have successfully passed the requirements and tests specified in this International Standard. 4.1.2 Manufacturer qualification Manufactu
25、rer approval shall be granted by outside agency procedure (see Table A.1, Procedure 1). 4.1.3 Product qualification Product approval shall be granted by outside agency procedure (see Table A.1, Procedure 2). BS ISO 12319:200634.2 Materials The clamp materials shall be as described in the definition
26、document. 4.3 Configuration The clamps shall be installed on a mandrel having a diameter within 0,025 mm of the specified diameter. With a shim placed between the clamp feet, as specified in the part standard, having the same dimensions 0,025 mm thick, all dimensions shall be within those specified
27、in the part standard. Mounting hole alignment shall be within 0,254 mm. 4.4 Dimensional requirements The clamp dimensional requirements shall be as described in the definition document. 4.5 Mass The clamp masses shall be as described in the definition document. 4.6 Surface appearance Workmanship sha
28、ll be of a sufficiently high grade to ensure that the clamps are of uniform quality, free from burrs, slivers, sharp edges or other defects which would affect their services. 4.7 Surface treatment The clamp surface treatment shall be as described in the definition document. 4.8 Marking Verify that e
29、ach clamp is identified according to the part standard with the standard number, size and manufacturers name or trademark. 4.9 Vibration and transmissibility When the clamps are tested in accordance with ISO 9679, they shall not exhibit any evidence of deterioration of the sheathing or cushion, nor
30、cracking or separation of metal components, and shall maintain minimum retention values. 4.10 Retention When the clamps are tested in accordance with ISO 9679, the minimum retention values shall be according to Table 1. Table 1 Minimum retention values Tube diameter Minimum axial force kg 12 mm (0,5
31、 in) 7,0 19 mm (0,75 in) 12,0 Fixed type clamps 25 mm (1 in) 16,0 Sliding type clamps If the device is required to permit tube movement, a force of between 0,46 kg and 4,5 kg should be recorded. BS ISO 12319:20064 4.11 Titanium compatibility When the clamps are tested in accordance with ISO 9679, th
32、ere shall be no evidence of cracking, pitting or abrasion of the titanium tube when clamps are subject to this requirement. 4.12 Flame resistance For non-metallic clamps using non-metallic components, ISO 9679 applies. 4.13 Ozone resistance Ozone resistance is required for clamps utilizing elastomer
33、 sheathing or cushion (except EPDM elastomer due to its inherent ozone-resistant properties). When the clamps are tested in accordance with ISO 9679, they shall be resistant to a volume fraction of ozone of 6 106under an 80 % strain. 4.14 Ultraviolet resistance If required, determine resistance to u
34、ltraviolet attack of non-metallics, such as some plastics and elastomers, in accordance with ISO 4892-3. 4.15 Insulation properties If required, determine the electrical insulation properties of the electrical sheathing or cushion in accordance with ISO 2951. 5 Quality assurance 5.1 Responsibility f
35、or inspection Unless otherwise specified in the contract, or purchase order, the contractor is responsible for the performance of all inspection requirements as specified in this International Standard. 5.2 Classification of inspection The examining and testing of clamps shall be classified as follo
36、ws: qualification inspection (see 5.3); acceptance inspection (see 5.4). 5.3 Qualification inspection 5.3.1 Samples See Table 2. Unless otherwise specified by the test specification, samples for qualification testing shall consist of 12 clamps each per part standard of the following sizes. Metric si
37、zes: 06, 10, 14, 16, 20, 28, 32 and 38 Inch sizes: -4, -6, -8, -10, -12, -16, -24 and -32. BS ISO 12319:20065Table 2 Qualification test sequence and number of test specimens in sample Clamp sample number Characteristic Defined in 1 2 3 4 5 6 7 8 9 10 11 12 Remarks Configuration 4.3 Dimensions 4.4 Ma
38、ss 4.5 Surface appearance 4.6 Surface treatment 4.7 Marking 4.8 Vibration and transmissibility 4.9 For tube diameters 12 mm (0,5 in), 19 mm (0,75 in), 25 mm (1 in) only Retention 4.10 For tube diameters 12 mm (0,5 in), 19 mm (0,75 in), 25 mm (1 in) only Titanium compatibility 4.11 For tube diameter
39、25 mm (1 in) only Flame resistance 4.12 Ozone resistance 4.13 Ultraviolet resistance (if required) 4.14 Insulation properties (if required) 4.15 5.3.2 Retention of qualification To retain qualification, the contractor shall forward samples for testing at intervals of not more than two years. The qua
40、lifying activity shall establish the initial reporting date. The qualifying activity shall specify who will perform the following tests: a) examination of the product in accordance with 4.3 to 4.15; b) physical properties test in accordance with the applicable material specification; c) vibration an
41、d transmissibility test in accordance with 4.9. 5.3.3 Sampling A simple random sampling shall be selected from each inspection lot in accordance with ISO 2859-1. The inspection level and acceptance quality level (AQL) shall be as specified in Table 3. Cushion-material test specimens, if applicable,
42、shall be cut from clamp cushions and shall be of sufficient size to be tested in accordance with the test methods of the applicable material specification sheet. Tensile and elongation cushion-material test specimens may be cut from larger size clamp cushions of the same inspection lot and shall be
43、provided by the manufacturer. BS ISO 12319:20066 Table 3 Classification of defects Class of defect AQL Nonconformity on Clamp cushion Major 1,0 material thickness inside width colour Minor A 4,0 workmanship marking Clamp band Major 1,0 material thickness width Minor A A bolt hole diameter workmanshi
44、p marking Clamp assembly Major 1,0 loop diameter a, d1 position tolerance from d1to d2bMinor 4,0 workmanship marking aNominal diameter for which a clamp is intended for use. bd2is the mounting hole diameter. 5.3.4 Identification of samples Samples of each size shall be packaged separately and forwar
45、ded to the testing facility specified by the qualifying agency. Samples shall be clearly identified by securely attached durable tags marked with the following information: the text “sample for qualification test”; specification “ISO XXXX”; the text “CLAMP, LOOP”; part standard sheet part number; ma
46、nufacturers part number; name of manufacturer; the text “submitted (date) under authorization”. 5.3.5 Test report The contractor shall provide the agency responsible for qualification with a certified test report, in duplicate, showing quantitative results for tests required by this International St
47、andard. This report shall designate the part number of the clamps submitted. The report shall also include the manufacturers drawing specifying the dimensions of the clamp in both the open and closed positions and the manufacturer of the cushion material, if applicable. BS ISO 12319:200675.4 Accepta
48、nce inspection Acceptance inspection shall consist of the tests and inspections specified in 4.3, 4.4, 4.6, 4.7 and 4.8. The quality conformance test report shall be in accordance with Clause 7. An inspection lot shall consist of clamps for a particular size and material produced under essentially the same manufacturing conditions and presented for inspection at the same time. 6 Packaging 6.1 Unless otherwise specified, all clamps shall be preserved and packaged
