1、BRITISH STANDARDBS EN 3079:2006Aerospace series Pipe coupling 830 up to 28 000 kPa Adaptors Metric series Technical specificationThe European Standard EN 3079:2006 has the status of a British StandardICS 49.080g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g
2、50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 3079:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 September 2006 BSI 2006ISBN 0 580 49151 XNational forewordThis Bri
3、tish Standard was published by BSI. It is the UK implementation of EN 3079:2006. 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 sec
4、retary.This 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 publicationAmd. No. Date CommentsEUROPEAN STANDAR
5、D NORME EUROPENNE EUROPISCHE NORM EN 3079 July 2006 ICS 49.080 English Version Aerospace series - Pipe coupling 830 up to 28 000 kPa - Adaptors - Metric series - Technical specification arospatiale - Systme de raccordement 830 jusqu 28 000 kPa - Raccords implanter - Srie mtrique - Spcification techn
6、ique Luft- und Raumfahrt - Rohrverschraubung 830 bis 28 000 kPa - Anschlussverschraubungen - Metrische Reihe - Technische Lieferbedingungen This European Standard was approved by CEN on 13 January 2006. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the con
7、ditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in thre
8、e official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Aus
9、tria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR
10、 STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 3079:2006: EEN 3079:2006 (E) 2 Contents Page
11、 Foreword3 1 Scope 4 2 Normative references 4 3 Terms and definitions .5 4 Requirements, inspection and test methods6 5 Quality assurance. 16 6 Preparation for delivery . 17 Annex A (normative) Batch identification 21 EN 3079:2006 (E) 3 Foreword This European Standard (EN 3079:2006) has been prepare
12、d by the AeroSpace and Defense Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations and the Official Services of the member countries
13、 of ASD, prior to its presentation to CEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by January 2007, and conflicting national standards shall be withdrawn at the latest by January 2007. Attent
14、ion is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of t
15、he following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Sloven
16、ia, Spain, Sweden, Switzerland and the United Kingdom. EN 3079:2006 (E) 4 1 Scope This standard specifies the required characteristics, inspection and test methods, quality assurance and procurement requirements for metric series 830 adaptors, for temperature ranges type II and III according to ISO
17、6771 and nominal pressure up to 28 000 kPa. 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 latest edition of the referenced document (including any ame
18、ndments) applies. ISO 2685, Aircraft Environmental test procedure for airborne equipment Resistance to fire in designated fire zones. 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 6771, A
19、erospace Fluid systems and components Pressure and temperature classifications. ISO 6772, Aerospace Fluid systems Impulse testing of hydraulic hose, tubing and fitting assemblies. ISO 7137, Aircraft Environmental conditions and test procedures for airborne equipment. ISO 7257, Aircraft Hydraulic tub
20、ing joints and fittings Rotary flexure test. ISO 8625-1, Aerospace Fluid systems Vocabulary Part 1: General terms and definitions relating to pressure. ISO 9538, Aerospace Hydraulic tubing joints and fittings Planar flexure test. EN 2000, Aerospace series Quality assurance EN aerospace products Appr
21、oval of the quality system of manufacturers. EN 2491, Aerospace series Molybdenum disulphide dry lubricants Coating methods. EN 2607, Aerospace series Straight metric-size unions with locking ring Configuration, O-ring dimensions.1)EN 2608, Aerospace series Installation and removal requirements for
22、830 adaptor, threaded, with lockring.1) EN 2813, Aerospace series Aluminium alloy AL-P6061-T6 Drawn tube for pressure applications 0,6 mm a 12,5 mm.1)EN 3120, Aerospace series Titanium alloy TI-P64003 Cold worked and stress relieved Seamless tube for pressure systems 4 mm D 51 mm 690 MPa Rm 1 030 MP
23、a.1)EN 3566, Aerospace series Pipe coupling 830 in titanium alloy Adaptors with lockring. EN 9133, Aerospace series Quality management systems Qualification procedure for aerospace standard parts.1) EN 10204, Metallic products types of inspection documents MIL-H-5606, Hydraulic fluid, Petroleum Base
24、, Aircraft, Missile and Ordnance.2)MIL-H-8446, Hydraulic fluid, Nonpetroleum Base, Aircraft.2)1) Published as ASD Prestandard at the date of publication of this standard. 2) Published by: Department of Defense (DoD), the Pentagon, Washington, D. C. 20301. EN 3079:2006 (E) 5 3 Terms and definitions F
25、or the purposes of this standard, the following definitions apply. 3.1 nominal pressure, proof pressure, impulse pressure, burst pressure according to ISO 8625-1 3.2 port boss threaded connection with a seal, component to pipe line, machined into the component 3.3 Surface defects 3.3.1 surface irreg
26、ularity nonconformity with general surface appearance, possible defect 3.3.2 crack clean (crystalline) fracture passing through or across the grain boundaries that possibly follows inclusions of foreign elements. Cracks are normally caused by overstressing the metal during forging or other formattin
27、g operations, or during heat treatment. Where parts are subject to significant reheating, cracks are usually discoloured by scale. 3.3.3 fold doubling over of metal which can occur during the forging operation. Folds can occur at or near the intersection of diameter changes, and are especially preva
28、lent with non-circular necks, shoulders and heads. 3.3.4 lap fold-like machining defect 3.3.5 seam 1) Usually a surface opening or crack resulting from a defect obtained during casting of forging 2) Foreign material, stringer in the material, which is not homogenous with base metal 3.3.6 pit void or
29、 hole in the surface as caused, for example, by corrosion 3.4 Quality assurance 3.4.1 batch a manufacture run of a given part number from the same batch of material, processed at the same time and in the same manner 3.4.2 acceptance quality limit (AQL) when a continuing series of lots is considered,
30、 a quality level which for the purposes of sampling inspection is the limit of a satisfactory process average EN 3079:2006 (E) 6 3.4.3 qualification testing required to demonstrate successful performance of the coupling assembly in simulated service (overload, destructive and fatigue tests) 4 Requir
31、ements, inspection and test methods See Tables 1 and 2. 4.1 Test conditions and preparation of specimens for qualification 4.1.1 Test fluids Unless otherwise specified, tests shall be conducted using e.g. a petroleum base hydraulic fluid to MIL-H-5606 for coupling assemblies of type II temperature r
32、ange and a silicate ester base hydraulic fluid to MIL-H-8446 for those of type III temperature range. Water may be used, whenever practical, for proof, burst, stress corrosion and re-use capability testing. For other than hydraulic system applications, it is preferable to use system fluid for leakag
33、e (gaseous pressure) and proof testing. 4.1.2 Specimen preparation Test specimen shall be assembled as illustrated in Table 2 and Figures 2, 4 and 5. 4.1.3 Lubricants Hydraulic system fittings shall be assembled using the system fluid as lubricant, or another lubricant which is compatible with the s
34、ystem fluid, and which has essentially the same lubricity characteristics, only where specified in this standard or by the purchaser. 4.1.4 Adaptor installation Adaptor shall be installed according to EN 2607 and EN 2608. EN 3079:2006 (E) 7 Table 1 Requirements, inspection and test methods Clause Ch
35、aracteristic Requirement Inspection and test method QaAa4.2bMaterials Conformity with the product standards Chemical analysis or certi-ficate of compliance to EN 10204 issued by semi-finished product manufac-turer X 100 %X 100 %4.3bDimensions Conformity with the product standards Suitable measuring
36、instruments X 100 %X 50 % 4.4bProduct identification Marking according to product standards and definition docu-ments including batch identi-fication to the Annex A. It shall be legible and shall not adversely affect the materials or the functioning of the products. Visual examination X 100 %X 100 %
37、4.5bSurface rough-ness Conformity with the product standards. Sealing surface shall not contain any radial tool marks. Suitable measuring instru-ments or visual-tactile samples X 100 %X 100 %4.6bSurface treatment Conformity with the product standards Visual examination X 100 %X 100 %4.7bSurface defe
38、cts Parts shall be free from surface defects indicated in 3.3 liable to have an adverse effect on their characteristics and endurance. Visual inspection using suitable methods. X 100 %X 100 %Threads Threads may be cut, rolled or ground, except titanium alloys which external threads should be rolled
39、and, if machined, shall have an arithmetical mean deviation, Ra, of the profile of 3,2 m or smoother. The grain flow in rolled threads should be continuous and follow the general thread contour with the maximum density at the thread root. Surface defects are not acceptable on any part of the thread
40、except the crest. Visual examination Specimens shall be taken from finished parts by sectioning on a longitudinal plane across the thread area. X 100 %X 100 %continuedEN 3079:2006 (E) 8 Table 1 (continued) Clause Characteristic Requirement Inspection and test method QaAa4.8 Proof pressure The coupli
41、ng assembly shall withstand pressure equal to twice the nominal pressure of the fluid system for 5 min, at ambient temperature without leakage and shall not show any evidence of permanent defor-mation or other malfunction, when using the specified torque values. The coupling assembly shall be connec
42、ted to a pressure source with one end free to move. Rate of pressure increase shall be 150 000 kPa 37 500 kPa/min. X 4.9 Gaseous pressure The coupling assembly shall withstand a gaseous pressure equal to the nominal pressure for 5 min, at ambient tem-perature. There shall be no visible formation of
43、bubbles after 1 min at pressure or other malfunction that would affect assembly or disassembly, when using the torque values speci-fied. The coupling assembly shall be solvent cleaned and air dried prior to testing. It shall be assembled and tightened to the minimum torques specified in table 3a. It
44、 shall then be pressurised with nitrogen to the nominal pressure. This pressure shall be maintained for 5 min while the specimens are immer-sed in water or suitable oil (see figure 1). X 4.10 Hydraulic impulse resistance The coupling assembly shall withstand 200 000 impulse pressure cycles without l
45、eakage. The coupling assembly shall be impulse tested at the temperatures and in the sequence specified in ISO 6772. X 4.11 Minimum burst pressure Pressure of four times the spe-cified nominal pressure shall be applied. There shall be no leakage or burst at less than this pressure. The test assembly
46、 need not meet any disassembly or assembly requirements after this test. It is not essential that the assembly actually be burst but it shall be able to maintain four times the nominal system operating pressure at a mini-mum of 5 min. The coupling assembly shall be connected to a source of pressure
47、with one end free to move. The pressure shall be increased continuously at a rate of 150 000 kPa 37 500 kPa/min until the assembly bursts or leaks, or as a minimum, reaches the specified burst pressure. Three ambient assemblies shall be tested at ambient tempe-rature and three assem-blies at a maxim
48、um rated temperature. X continuedEN 3079:2006 (E) 9 Table 1 (continued) Clause Characteristic Requirement Inspection and test method QaAa4.12 Flexure fatigue resistance Standard flexure test temperature type II and type III pressure class D, E. When tested with cold worked and stress relieved titani
49、um tubing (as defined in EN 3120), welded fittings tested by the planar flexure test method to ISO 9538 or rotary flexure test method to ISO 7257 shall achieve a target minimum flexure fatigue stress of 130 N/mm2for 107cycles. This bending stress shall be determined prior to the appli-cation of internal pressure. In order to obtain the true bending stress, it is always necessary to measure the microstrain dyna-mically at the flexure test frequency. The tolerance for
