1、BSI Standards PublicationBS EN 4560:2015Aerospace series Pipecoupling 37, spherical up to21 000 kPa Inch series Technical specificationBS EN 4560:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 4560:2015. Itsupersedes BS EN 4560:2003 which is withdrawn.The
2、UK participation in its preparation was entrusted to TechnicalCommittee ACE/69, Aerospace hydraulic systems, fluids andcomponents.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions
3、of a contract. Users are responsible for its correctapplication. The British Standards Institution 2015. Published by BSI StandardsLimited 2015ISBN 978 0 580 88146 6ICS 49.080Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the
4、 authority of theStandards Policy and Strategy Committee on 31 July 2015.Amendments issued since publicationDate Text affectedBS EN 4560:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 4560 July 2015 ICS 49.080 Supersedes EN 4560:2003English Version Aerospace series - Pipe coupling 37, sphe
5、rical up to 21 000 kPa - Inch series - Technical specification Srie arospatiale - Systme de raccordement sphrique 37, jusqu 21 000 kPa - Srie inch - Spcification technique Luft- und Raumfahrt - Rohrverschraubung 37 mit Kugelbuchse, bis 21 000 kPa - Inch-Reihe - Technische Lieferbedingungen This Euro
6、pean Standard was approved by CEN on 10 January 2015. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references c
7、oncerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member
8、 into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, Franc
9、e, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOM
10、ITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4560:2015 EBS EN 4560:2015EN 4560:2015 (E) 2 Contents Page European foreword .3 1 Scope 4 2 Norma
11、tive references 4 3 Terms and definitions .5 3.1 Pressure 5 3.2 Coupling and assembling .5 3.3 Surface defects 6 3.4 Quality assurance 6 4 Requirements, inspection and test methods 7 4.1 Test conditions and preparation of specimens for qualification 7 4.1.1 Test fluids .7 4.1.2 Specimen preparation
12、.7 4.1.3 Pipe assembly 8 5 Quality assurance . 13 5.1 Product qualification 13 5.2 Quality control records 13 5.3 Acceptance conditions 13 5.3.1 Classification of defects 13 5.3.2 Level of inspection . 14 5.4 Rejection 14 5.5 Purchasers (users) quality control 14 6 Preparation for delivery . 16 6.1
13、Cleaning . 16 6.2 Preservation and packaging 16 Annex A (informative) Standard evolution form 17 BS EN 4560:2015EN 4560:2015 (E) 3 European foreword This document (EN 4560:2015) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquir
14、ies and votes carried out in accordance with the rules of this Association, this European Standard has received the approval of the National Associations and the Official Services of the member countries of ASD, prior to its presentation to CEN. This European Standard shall be given the status of a
15、national standard, either by publication of an identical text or by endorsement, at the latest by January 2016, and conflicting national standards shall be withdrawn at the latest by January 2016. This document supersedes EN 4560:2003. Attention is drawn to the possibility that some of the elements
16、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 the following countries are bound to implement this Europea
17、n Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Sloven
18、ia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 4560:2015EN 4560:2015 (E) 4 1 Scope This European Standard specifies the required characteristics, inspection and test methods, quality assurance and procurement requirements for inch series, pipe coupling, 37, spherical, for tempe
19、rature ranges from type II to type V according to ISO 6771 and nominal pressure up to 21 000 kPa. In addition to the requirements of this technical specification, the coupling assemblies shall be qualified in accordance with equipment or component specification requirements. 2 Normative references T
20、he following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. prEN 295
21、1, Metallic materials Test method Micrographic determination of content of non-metallic inclusions 1)EN 9133, Aerospace series Quality management systems Qualification procedure for aerospace standard parts EN 10204, Metallic products Types of inspection documents EN ISO 1302, Geometrical Product Sp
22、ecification (GPS) Indication of surface texture in technical product documentation (ISO 1302) 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 index
23、ed by acceptance quality limit (AQL) for lot-by-Iot inspection ISO 6771, Aerospace 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
24、test procedures for airborne equipment ISO 8625-1, Aerospace Fluid systems Vocabulary Part 1: General terms and definitions related to pressure TR 2674, Aerospace series Design and construction of pipelines for fluids in liquid or gaseous condition Rigid lines, installation 2)MIL-L-23699, Lubricatin
25、g Oil, Aircraft Turbine Engine, Synthetic Base, NATO Code Number O-156 3)1) Available on ASD-STAN website (http:/www.asd-stan.org/). 2) Published as ASD-STAN Technical Report at the date of publication of this European Standard (http:/www.asd-stan.org/).3) Published by : Department of Defense (DoD),
26、 the Pentagon, Washington, D.C. 20301, US (http:/www.defenselink.mil/).BS EN 4560:2015EN 4560:2015 (E) 5 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 Pressure nominal pressure, proof pressure, impulse pressure, burst pressure according to
27、Table 1 below. Table 1 Dimensional code Nominal diameter Wall thickness 0,71 mm Wall thickness 0,89 mm Nominal pressure Proof pressure Impulse pressure Burst pressure Nominal pressure Proof pressure Impulse pressure Burst pressure mm bars bars bars bars bars bars bars bars 03 4,76 210 420 210 840 21
28、0 420 210 840 04 6,35 05 7,92 360 720 06 9,52 160 270 540 360 720 08 12,70 105 210 105 420 160 270 540 10 15,87 180 360 105 210 105 420 12 19,05 140 280 180 360 16 25,40 40 105 40 210 140 280 3.2 Coupling and assembling 3.2.1 coupling assembly assembled nut, ferrule and pipe mating with e.g. nipple,
29、 union, elbow, see Figure 1 Key 1 Straight union 2 Nut 3 Ferrule Figure 1 Example of coupling assembly BS EN 4560:2015EN 4560:2015 (E) 6 3.2.2 dimensional code corresponds to the nominal diameter given in 16thof inches within two digits 3.2.3 snug moment when positive resistance to rotation is obser
30、ved during assembling 3.3 Surface defects 3.3.1 surface irregularity 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
31、 by overstressing the metal during forging or other forming 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
32、intersection of diameter changes and are especially prevalent 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 or forging (2) extraneous material, stringer in the mater
33、ial, which is not homogeneous with base metal 3.3.6 pit void or hole in the surface as caused, for example, by corrosion 3.4 Quality assurance 3.4.1 production batch definite quantity of some commodity or service produced at one time under conditions that are presumed uniform 3.4.2 delivery batch ba
34、tch consisting of couplings with the same identity block which may come from different production batches 3.4.3 acceptance quality limit AQL when a continuing series of lots is considered, a quality level which for the purposes of sampling inspection is the limit of a satisfactory process average BS
35、 EN 4560:2015EN 4560:2015 (E) 7 3.4.4 qualification testing required to demonstrate successful performance of the coupling assembly in simulated service (overload, destructive and fatigue tests) 3.4.5 major defect defect other than critical, that is likely to result in a failure or to reduce materia
36、lly the usability of the considered product for its intended purpose 3.4.6 minor defect defect that is not likely to reduce materially the usability of the considered product for its intended purpose, or that is a departure from established specification having little bearing on the effective use or
37、 operation of this product 4 Requirements, inspection and test methods See Table 2 and Table 3. Qualification tests given from 4.12 to 4.15 shall only be made when required. Complementary qualification tests may be determined in direct relation with the application (e.g. vibration test, thermal shoc
38、k test). The coupling shown on the figures of this European Standard are for information only. The test specimens shall be assembled with the part to test (e.g. elbow fitting instead of straight fitting). Non removable coupling (e.g. welded elbow, welded reducer) shall be tested on sample pipes in c
39、ombination with removable (threaded) couplings. 4.1 Test conditions and preparation of specimens for qualification 4.1.1 Test fluids Unless otherwise specified, tests shall be carried out using e.g. oil compatible with the test temperature range. Water may be used, whenever practical, for proof, bur
40、st, stress corrosion and re-use capability testing. 4.1.2 Specimen preparation Shaped parts shall be machined with the grain flow of the bar or plate in the direction of the fluid. Installations on the coupling shall be in accordance with TR 2674. The coupling shall not be lubricated prior the first
41、 assembling. For the next assembling they shall be lubricated with engine oil (e.g. according to MIL-L-23699) at the interface between the nut and the ferrule. Prior to testing, and unless otherwise specified, all couplings with dimensional code up to 12 shall be assembled using either of the follow
42、ing methods. For couplings with dimensional code greater than 12 the assembling shall be made by using the torque tightening method: torque tightening method: A torque value comprised between the minimum and the maximum given in Table 4 shall be applied to the nut per TR 2674. angle tightening metho
43、d: The following sequence shall be applied: 1) tighten the nut with a wrench to snug; 2) turn the nut an additional 60 see Figure 2 a); BS EN 4560:2015EN 4560:2015 (E) 8 3) loosen the nut; (for new parts assembling only); 4) retighten the nut with a wrench to snug; 5) turn the nut an additional 30 s
44、ee Figure 2 b). Figure 2 c) gives also a checking method by using and returning an open end wrench with a 15 offset. The torque tightening method used for the test and value applied shall be recorded. 4.1.3 Pipe assembly The method of joining the pipe to the coupling (brazing, welding, mechanical at
45、tachment, etc.) shall not be detrimental to the properties, strength or geometry of the pipe assembly. The joint shall be in accordance with the design instructions and shall be inspected by direct measurement, X-ray or other non-destructive methods. a) c) b) Figure 2 Configuration for angle tighten
46、ing method BS EN 4560:2015EN 4560:2015 (E) 9 Table 2 Requirements, inspection and test methods (1 of 3) Clause Characteristic Requirement Inspection and test method Q a A b 4.2 bMaterials Metallic materials shall meet the acceptance criteria given in prEN 2951. Conformity with the product standards
47、Metallic materials shall be tested in accordance with prEN 2951. Certificate of compliance to EN 10204 issued by the semi-finished product manufacturer X 100 % X 100 % 4.3 bDimensions Conformity with the product standards Suitable measuring instruments X 100 % X 20 % 4.4 bProduct identification Mark
48、ing according to product standards. It shall be legible and shall not adversely affect the material or the functioning of the products. Visual examination X 100 % X 100 % 4.5 bSurface roughness Conformity with the product standards Interpreted in accordance with EN ISO 1302. Suitable measuring instr
49、uments or visual-tactile samples X 100 % X 200 % 4.6 bSurface coating or treatment Conformity with the product standards Visual examination X 100 % X 50 % 4.7 bSurface defects 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 The external threads of couplings should be rolled and, if machined, shall have a maximal value of 1,6 m for Rain accordance with EN ISO 1
