1、BRITISH STANDARD AEROSPACE SERIES BS EN 2070-5:1991 Specification for Aluminium and aluminium alloy wrought products Technical specification Part 5: Tube used under pressure This European Standard EN 2070-5:1989 has the status of a British Standard.BSEN2070-5:1991 This British Standard was published
2、 under the authorityofthe Board of BSI and comes intoeffect on 31January1991 BSI 12-1999 The following BSI references relate to the work on this standard: Committee reference ACE/61 Draft for comment 88/72194 DC ISBN 0 580 19078 1 Cooperating organizations The European Committee for Standardization,
3、 under whose supervision this European Standard was prepared, comprises the national standards organizations of the following Western European countries. Austria Oesterreichisches Normungsinstitut Belgium Institut belge de normalisation Denmark Dansk Standardiseringsraad Finland Suomen Standardisoim
4、isliito, r.y. France Association franaise de normalisation Germany Deutsches Institut fr Normung e.V. Greece Hellenic Organization for Standardization Iceland Technological Institute of Iceland Ireland National Standards Authority of Ireland Italy Ente Nazionale Italiano di Unificazione Luxemburg In
5、spection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portugus da Qualidade Spain Asociacin Espaola de Normalizacin y Certificacin Sweden Standardiseringskommissionen i Sverige Switzerland Association suisse de normali
6、sation United Kingdom British Standards Institution Amendments issued since publication Amd. No. Date of issue CommentsBSEN2070-5:1991 BSI 12-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Brief history 2 Text of EN 2070-5 3 National appendix A Inside back cov
7、er National appendix B Inside back coverBSEN2070-5:1991 ii BSI 12-1999 National foreword This British Standard has been prepared under the direction of the Aerospace Standards Policy Committee and is the English language version of EN2070 “Aerospace series. Aluminium and aluminium alloy wrought prod
8、ucts. Technical specification.” Part 5: “Tube used under pressure”, published by the European Committee for Standardization (CEN). EN2070-5 was produced as a result of international discussion in which the UK took an active part. A British Standard does not purport to include all the necessary provi
9、sions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN title page
10、, pages 2 to 8, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2070-5 December 1989 UDC 6
11、69.71.018.26-46:620.1:629.7 Key words: Aircraft industry, rolled products, semi-finished products, aluminium, aluminium alloys, metal tubes, pressure pipes, manufacturing, specifications English version Aerospace series Aluminium and aluminium alloy wrought products Technical specification Part 5: T
12、ube used under pressure Srie arospatiale Demi-produits corroys en aluminium et alliages daluminium Spcification technique Partie 5: Tubes pour canalisation sous pression Luft- und Raumfahrt Halbzeug aus Aluminium und Aluminium-Knetlegierungen Technische Lieferbedingungen Teil 5: Innendruckrohre This
13、 European Standard was accepted by CEN on 1988-07-20. CEN members are bound to comply with the requirements of CEN 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 refe
14、rences concerning such national standards may be obtained on application to the CEN Central Secretariat 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 memb
15、er into its own language and notified to CEN Central Secretariat has the same status as the official versions. CEN members are the national standards organizations of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxemburg, Netherlands, Norway, Portugal, Spain
16、, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels CEN 1989 Copyright reserved to all CEN members Ref. No. EN 2070-5:1989 EEN2070-5:1989 BSI 12-199
17、9 2 Brief history This European Standard has been prepared by the European Association of Aerospace Manufacturers (AECMA). After inquiries and votes carried out in accordance with the rules of this Association, this Standard has successively received the approval of the National Associations and the
18、 Official Services of the member countries of AECMA, prior to its presentation toCEN. According to the Common CEN/CENELEC Rules, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxemburg, Net
19、herlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. Contents Page Brief history 2 1 Scope and field of application 3 2 References 3 3 Manufacture 3 4 Batch 3 5 Dimensions 3 6 External defects 3 7 Tensile test 4 8 Batch uniformity 4 9 Flattening test 4 10 Drift test 4 11 Hydraul
20、ic pressure deformation test 5 12 Tube leakage test 6 13 Coarse grain zone 6 14 Grain size 6 15 Internal cleanliness inspection 6 16 Special tests 6 17 Marking 6 Table 1 4 Table 2 5 Table 3 6 Table 4 Summary of requirements for tubes used under pressure 7EN2070-5:1989 BSI 12-1999 3 1 Scope and field
21、 of application The present standard specifies the particular requirements of tubes of round section for use under pressure in aluminium and aluminium alloys, manufactured by extrusion or extrusion and drawing. This standard shall be used in conjunction with EN2070-1. 2 References EN 2002-1, Aerospa
22、ce series Test methods for metallic materials Part 1: Tensile testing at ambient temperature 1) . EN 2002-8, Aerospace series Test methods for metallic materials Part 8: Micrographic determination of grain size 1) . EN 2002-9, Aerospace series Test methods for metallic materials Part 9: Tube drift e
23、xpandingtest 1) . EN 2002-10, Aerospace series Test methods for metallic materials Part 10: Tube flattening test 1) . EN 2002-16, Aerospace series Test methods for metallic materials Part 16: Dye penetranttesting 1) . EN 2002-17, Aerospace series Test methods for metallic materials Part 17: Integrit
24、y test fortubes 1) . EN 2002-18, Aerospace series Test methods for metallic materials Part 18: Hydraulic distention test for tubes 1) . EN 2002-20, Aerospace series Test methods for metallic materials Part 20: Eddy current test on pipes under pressure 1) . EN 2070-1, Aerospace series Aluminium and a
25、luminium alloy wrought products Technical specification Part 1: General requirements. 3 Manufacture Unless otherwise specified, the method of manufacture to be employed shall be at the discretion of the manufacturer, however, the following requirements shall be observed: The use of bridge or multi-h
26、ole dies or die-quenching is only permissible when agreed in writing between the manufacturer and purchaser. Tubes shall not be subjected to cold drawing or straightening after precipitation hardening unless required by the material standard. 4 Batch 4.1 Batch definition Batch definition shall confo
27、rm to EN2070-1 except that aggregation of casts is not permitted. 4.2 Batch size The maximum batch size shall be 250 kg. 5 Dimensions Dimensions and tolerances shall conform to the relevant semi-finished product standard or drawing. The frequency of examination adopted by the manufacturer shall be s
28、ufficient to permit him to certify compliance with the requirements. 6 External defects Tubes shall not be ground or polished however, local dressing of scratches by polishing is permitted. 6.1 Unless otherwise required on the order or the inspection schedule, the condition of the internal and exter
29、nal surfaces of the tubes shall conform withTable 1 and be determined by visual examination. Dye penetrant testing may be applied in accordance with EN2002-16, to verify the extent or existence of surface defects. Examination of the internal surface shall be carried out as follows: either, visual in
30、spection of200mm long pieces, slit in the longitudinal direction, or by any other method agreed between purchaser and manufacturer, for example boroscope examination. The frequency of examination adopted by the manufacturer shall be sufficient to permit him to certify compliance with the requirement
31、s ofTable 1. 1) In preparationEN2070-5:1989 4 BSI 12-1999 Table 1 6.2 Surface finish The surfaces of the tube shall be smooth. Where the dimensions make it possible the measurement of the roughness shall be carried out. The readings shall meet the following requirements: Ra k 0,8 4m for outside surf
32、ace Ra k 1,6 4m for inside surface. The “capability clause” may be applied to this requirement. 7 Tensile test In accordance with EN 2002-1. The number of tests per batch is specified inTable 4. The test results shall meet the requirements of the material standard. 8 Batch uniformity Batch uniformit
33、y shall be demonstrated by either: 8.1 Eddy current testing in the same operation as required by 12.2 Tube leakage test Method 2. 8.2 By any other method agreed between the manufacturer and purchaser (e.g.hardness testing, an increase in the frequency of tensile testing, .) and specified on the orde
34、r or in the inspection schedule. 9 Flattening test Tubes shall be tested in accordance with EN2002-10, so that the height under load is equal to the value required by the material standard. The number of tests to be carried out is given inTable 4. After flattening samples shall be free from cracks.
35、Discontinuous surface ruptures shall be regarded as cracks if their total length exceeds80% of the length of the deformed edge. 10 Drift test Tubes shall be tested in accordance with EN2002-9. The mandrel angle shall be“=(74 1) . The external diameter of the expanded portion shall be in accordance w
36、ith the figure and Table 2. Type of defect Acceptance criteria Score marks Allowable defect depth: u 3 % of a aor 0,04 mm max. (u 5 % allowable for 6 XXX calloy series) Handling or Seizure marks Smears Allowable defect depth: u 3 % of a aor 0,04 mm max. (u 5 % allowable for 6 XXX calloy series) For
37、D b 38 mm: Max. 1 defect per metre of length. For D b 38 mm: Max. 2 defects per metre of length. Extrusion or drawing stoppage and resumption marks Embedded particles Cracks Blisters Superficial corrosion Rejected a a = nominal wall thickness. b D = nominal external diameter. c “Aluminum Association
38、” designationEN2070-5:1989 BSI 12-1999 5 Table 2 The expanded portion shall be free from cracks or non-uniform deformation. The frequency of testing is specified in Table 4. 11 Hydraulic pressure deformation test Tubes shall be tested in accordance with EN2002-18 in the condition required by the mat
39、erial standard. After testing tubes shall not exhibit a permanent deformation greater than0,2% and shall be free from any other defect that might be revealed by the test. The frequency of testing is specified in Table 4. The length of tube used for testing shall be discarded. Dimensions in millimetr
40、es D D u Nominal dimension Tolerances 3,2 4 6 8 10 12 14 16 18 20 4,50 5,60 8,40 10,40 13,00 15,60 18,20 20,00 22,50 25,00 0 0,25 25 32 40 50 63 70 80 90 100 30,00 38,40 48,00 57,50 72,45 80,50 92,00 103,50 115,00 0 0,40 NOTE 1If diameter D uis greater than the value indicated in Table 2, the test i
41、s valid if the expanded portion does not show any defects. NOTE 2For a non listed tube diameter D 1in Table 2: use the diameter D from the table which immediately precedes the diameter D 1to determine X: use this X to establish the D u1value of the tube: D u1= D 1(1 + X) D uD D -X =EN2070-5:1989 6 B
42、SI 12-1999 12 Tube leakage test Unless otherwise agreed between the manufacturer and the purchaser and stated on the order or inspection schedule tubes shall be examined by one of the following methods, at the discretion of the manufacturer. 12.1 Method 1: Pressure test All tubes shall be subjected
43、to a pressure test for leakage detection in accordance with EN2002-17. When under test, tubes shall not show any leakage, cracks, blisters or other defect. 12.2 Method 2: Eddy current test All tubes shall be subjected to an Eddy current test for leakage detection in accordance with EN2002-20. Tubes
44、shall be tested along their entire length. 13 Coarse grain zones Tubes shall be macrographically examined. The presence of zones of coarse grain shall be cause for rejection. The “capability clause” may be applied to this requirement. 14 Grain size The grain size shall be determined by micrographic
45、examination in accordance with EN2002-8. The grain size shall be measured on a longitudinal section after polishing and etching. The choice of the etching agent to show the structure shall be at the discretion of the manufacturer. The grain size shall meet the requirement of the relevant material st
46、andard or inspection schedule. The “capability clause” may be applied to this requirement. 15 Internal cleanliness inspection Tubes shall be free from grease or oil except that used for corrosion protection. No foreign matter shall be visible on a clean cloth passed through any tube. The “capability
47、 clause” may be applied to this requirement. 16 Special tests Special tests and inspections may be required by the purchaser (e.g.internal stress, electrical conductivity, intergranular corrosion, .). In such cases, after agreement between purchaser and manufacturer, nature of test, methods, number
48、and acceptance standards shall be specified on the order or in the inspection schedule. 17 Marking Marking shall be in accordance with EN 2070-1. If special tests in accordance with clause 16 are required the marking shall be defined and shall reflect these extra requirements. The frequency of exami
49、nation adopted by the manufacturer shall be sufficient to permit him to certify compliance with the requirements. 17.1 Unless otherwise agreed between manufacturer and purchaser and specified on the order or in the inspection schedule the position of the marking of tubes with a diameter equal or greater than6mm shall be in accordance withTable 3. 17.2 For tubes with a diameter less than6mm the marking shall be on a durable label attached to each bundle of products. Tab
