1、 April 2007Translation by DIN-Sprachendienst.English price group 12No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS
2、25.160.40; 49.035!$nZK“1755540www.din.deDDIN 29595Welding in aerospace Fusion welded metallic components RequirementsEnglish translation of DIN 29595:2007-04Schweien im Luft- und Raumfahrzeugbau Schmelzgeschweite metallische Bauteile AnforderungenEnglische bersetzung von DIN 29595:2007-04Soudage en
3、aronautique et espace Elments mtalliques souds par fusion ExigencesTraduction anglaise de DIN 29595:2007-04SupersedesDIN 29595:2004-12www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 24 pages05.11 DIN 29595:2007-04 Contents Foreword 3 1
4、Scope. 4 2 Normative references . 4 3 Symbols. 6 4 Requirements for fusion welding 6 5 Safety categories and quality levels . 7 5.1 General . 7 5.2 Safety category I 7 5.3 Safety category II . 7 5.4 Safety category III 7 5.5 Quality levels 7 6 Requirements 7 6.1 General . 7 6.2 Materials . 7 6.3 Dra
5、wings and inspection schedules 8 6.4 Manufacturing conditions. 8 6.5 Repair and maintenance . 8 6.6 Manufacturing documentation . 8 6.7 Limits for imperfections 8 7 Quality inspection. 8 7.1 General . 8 7.2 Test methods . 9 7.3 Scope of testing. 11 7.4 Repeat testing 11 Annex A (informative) Calcula
6、ted values. 20 2 PageDIN 29595:2007-04 Foreword This standard has been prepared by Joint Working Committee DIN/DVS AA 17/AG A 9 Schweien im Luft- und Raumfahrzeugbau of the Normenausschuss Schweitechnik (Welding Standards Committee). It provides requirements to be complied with when producing fusion
7、-welded components used in aerospace. Amendments This standard differs from DIN 29595:1983-04 and Supplement 1 to DIN 29595:1984-02 as follows: a) the title has been modified; b) the standard has been revised in form and substance; c) quality levels I, II and III have been changed to A, B und C in a
8、ccordance with DIN EN ISO 5817; d) the content of Supplement 1 has been adopted without any modifications as informative Annex A. The following corrections (indicated in the text by a vertical line in the left margin) have been made to DIN 29595:2004-12: a) The equations in Table 2, item 32, columns
9、 A and B which, due to a formatting error, were presented as two lines are now presented as one line. Previous editions LN 29595-1: 1975-09 LN 29595-2: 1975-09 DIN 29595: 1983-04, 2004-12 DIN 29595 Supp.1: 1984-02 3 DIN 29595:2007-04 1 Scope This standard applies to the development, manufacturing, m
10、aintenance and quality inspection of fusion-welded components for use in aerospace. 2 Normative references This standard incorporates, by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text, and the titles of the
11、publications are listed below. For dated references, subsequent amendments to or revisions of any of these publications apply to this standard only when incorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies (including any amend
12、ments). DIN 29591, Welding in aerospace Qualification testing of welders Welding of metallic components DIN 51220, Materials testing machines General requirements for materials testing machines, including verification and calibration DIN 54130, Non-destructive testing Magnetic leakage flux testing G
13、eneral DIN 65118-1, Aerospace Welded metallic components Indications on drawings DIN 65118-2, Aerospace Welded metallic components Directives for design DIN 65153, Aerospace Acceptance testing of plasma arc welding equipment DIN 65171, Aerospace Acceptance testing of fusion welding jigs and auxiliar
14、y equipment accuracy of control and movement DIN EN 462-1, Non-destructive testing Image quality of radiographs Part 1: Image quality indicators (wire type) Determination of image quality values DIN EN 462-2, Non-destructive testing Image quality of radiographs Part 2: Image quality indicators (step
15、/hole type) Determination of image quality value DIN EN 462-3, Non-destructive testing Image quality of radiogrammes Part 3: Image quality classes for ferrous metals DIN EN 462-4, Non-destructive testing Image quality of radiographs Part 4: Experimental evaluation of image quality values and image q
16、uality tables DIN EN 571-1, Non-destructive testing Penetrant testing Part 1: General principles DIN EN 583-1, Non-destructive testing Ultrasonic examination Part 1: General principles DIN EN 895, Destructive tests on welds in metallic materials Transverse tensile test DIN EN 910, Destructive test o
17、n welds in metallic materials Bend tests DIN EN 1418, Welding personnel Approval testing of welding operators for fusion welding and resistance weld setters for fully mechanized and automatic welding of metallic materials DIN EN 1435, Non-destructive testing of welds Radiographic testing of welded j
18、oints DIN EN 22553, Welded, brazed and soldered joints Symbolic representation on drawings DIN EN ISO 4063, Welding and allied processes Nomenclature of processes and reference numbers 4 DIN 29595:2007-04 DIN EN ISO 6520-1, Welding and allied processes Classification of geometric imperfections in me
19、tallic materials Part 1: Fusion welding DIN EN ISO 7500-1, Metallic materials Verification of static uniaxial testing machines Part 1: Tension/ compression testing machines Verification and calibration of the force-measuring system DIN EN ISO 9934-2, Non-destructive testing Magnetic particle testing
20、 Part 2: Detection media DIN EN ISO 9934-3, Non-destructive testing Magnetic particle testing Part 3: Equipment DIN EN ISO 14744-1, Welding Acceptance inspection of electron beam welding machines Part 1: Principles and acceptance conditions DIN EN ISO 14744-2, Welding Acceptance inspection of electr
21、on beam welding machines Part 2: Measurement of acceleration voltage characteristics DIN EN ISO 14744-3, Welding Acceptance inspection of electron beam welding machines Part 3: Measurement of beam current characteristics DIN EN ISO 14744-4, Welding Acceptance inspection of electron beam welding mach
22、ines Part 4: Measurement of welding speed DIN EN ISO 14744-5, Welding Acceptance inspection of electron beam welding machines Part 5: Measurement of run-out accuracy DIN EN ISO 14744-6, Welding Acceptance inspection of electron beam welding machines Part 6: Measurement of stability of spot position
23、DIN EN ISO 15616-1, Acceptance tests for CO2-laser beam machines for high quality welding and cutting Part 1: General principles, acceptance conditions DIN EN ISO 15616-2, Acceptance tests for CO2-laser beam machines for high quality welding and cutting Part 2: Measurement of static and dynamic accu
24、racy DIN EN ISO 15616-3, Acceptance tests for CO2-laser beam machines for high quality welding and cutting Part 3: Calibration of instruments for measurement of gas flow and pressure DIN ISO 857-1, Welding and allied processes Vocabulary Part 1: Metal welding processes LN 9051, Aerospace Identificat
25、ion marking of controlled components in the manufacture and maintenance of aircraft and space vehicles DVS 2713, Welding of titanium materials Materials, processes, manufacturing, testing and assessment of welded joints. DVS 2714, Welding equipment for manual and fully mechanized TIG-welding Specifi
26、cation of requirements DVS 2715-1, Coordinators/experts for welding, brazing, thermal spraying in aerospace SAE/AMS 2644, Inspection material Penetrant1)Directive 97/23/EC of the European Parliament and the European Council of 29 May 1997 on the approximation of the laws of the Member States concern
27、ing pressure equipment Commission Regulation (CE) No. 1702/2003, Part 21, relating to the certification of aircraft and related products, parts and appliances, as well as for the certification of design and production organisations 1) Obtainable from SAE World Headquarters, 400 Commonwealth Drive, W
28、arrendale, PA 15096-0001, USA. 5 DIN 29595:2007-04 3 Symbols a Nominal weld throat thickness b Weld width b Weld width difference c Pore distance d Pore diameter f Smallest distance of irregular surfaces (ripples) F Largest distance of irregular surfaces (ripples) fSum of inclusion areas h Height or
29、 width of imperfection n Number of pores in linear porosity s Weld metal thickness t Nominal workpiece thickness t1Nominal workpiece thickness of the larger workpiece t2Nominal workpiece thickness of the smaller workpiece 4 Requirements for fusion welding In order to ensure competent execution of we
30、lding work, the following requirements shall be complied with: a) the manufacturer of welded joints shall have suitable workshop facilities and equipment; b) the manufacturer shall employ in his company a competent welding coordinator (see DVS 2715-1) recognized by the relevant bodies or appointed i
31、nternally, who is deployed as the responsible and competent authority for welding related topics; c) manual welding works shall only be carried out by welders who are in possession of a valid qualification certificate in accordance with DIN 29591; d) mechanized welding works shall only be carried ou
32、t by operators in possession of a certificate in accordance with DIN EN 1418; e) the welding machines used for mechanized welding shall be subject to approval testing and regular inspection and maintenance; there are acceptance requirements for electron beam welding machines in DIN EN ISO 14744-1 to
33、 DIN EN ISO 14744-6, for CO2-laser beam welding machines in DIN EN ISO 15616-1 to DIN EN ISO 15616-3, for plasma arc welding equipment in DIN 65153 and for jigs and auxiliary equipment for fusion welding in DIN 65171. For TIG-welding machines the recommendations given in DVS 2714 apply. 6 DIN 29595:
34、2007-04 5 Safety categories and quality levels 5.1 General Welded joints are classified according to their function and requirements using safety categories and quality levels. 5.2 Safety category I Joints assigned to safety category I are those the failure of which under service conditions will res
35、ult in loss of the aircraft/spacecraft or one of its main components, or constitute a direct hazard to persons. 5.3 Safety category II Joints assigned to safety category II are those the failure of which will entail the malfunctioning of the aircraft/spacecraft while maintaining its safe operation u
36、ntil completion of the transportation mission is still assured. 5.4 Safety category III Joints assigned to safety category III are those which have no effect on the safety and transportation mission of the aircraft/spacecraft. 5.5 Quality levels Imperfections are to be tolerated where these are depe
37、ndent on the material or commensurate with the complexity of the work. The imperfections differ by their nature and size and are assigned to three quality levels as a function of the component requirements (see Table 1). Depending on the requirements to be met by the welded joint, each individual im
38、perfection of a component is assigned to one of the three quality levels (see DIN 65118-2). 6 Requirements 6.1 General The manufacturer of a welded joint shall provide evidence by means of tests that the requirements of this standard are met. The results shall be submitted to the inspector of the co
39、mpetent authority or to the client on request. The samples and devices, equipment and qualified personnel required for tests carried out by the competent authority shall be provided by the manufacturer. The inspector is entitled to witness performance of the quality inspection and to carry out indiv
40、idual tests himself. 6.2 Materials Only parent materials, filler materials and auxiliary materials specified in the relevant definition documents shall be used. 7 DIN 29595:2007-04 6.3 Drawings and inspection schedules Drawings and inspection schedules shall comply with the requirements of DIN 65118
41、-1. 6.4 Manufacturing conditions The welding-specific manufacturing conditions and sequences shall be monitored by the competent welding coordinator taking into account the relevant definition documents and manufacturing specifications. 6.5 Repair and maintenance The repair of impermissible imperfec
42、tions using fusion welding processes is subject to written authorization by the responsible welding coordinator in agreement with the quality assurance. Maintenance activities shall take place in accordance with the manufacturer or according to Commission Regulation (CE) No. 1702/2003, Part 21. Repa
43、ired components need to be rechecked as specified in 7.4. 6.6 Manufacturing documentation The manufacturer shall be able at any time to provide evidence of the welding conditions and sequences for the welded joints, for example in the form of identification marking as in LN 9051, documentation of th
44、e welding parameters and test reports. 6.7 Limits for imperfections Depending on the quality levels specified in the definition documents the imperfections und limits specified in Table 1 are permitted. The values given in Table 1 are based on results obtained on components by fusion welding under c
45、ommon aerospace conditions (e.g. pre-treatment, use of vacuum melted steels). Their impact in particular on the dynamic structural strength shall be checked on a case-by-case basis. The imperfections are defined in accordance with DIN EN ISO 6520-1. The tabular values are valid for welding process2)
46、reference numbers 141, 15, 311 in the weld thickness range from 0,4 mm to 4,0 mm, and for reference numbers 511 and 52 from 0,4 mm to 20,0 mm. The applicable thickness is the nominal thickness t. In the case of differing nominal thicknesses of the components being joined by fillet welding, the permi
47、ssible imperfections relate to the smaller nominal thickness, but for butt welding to the greater nominal thickness. 7 Quality inspection 7.1 General The test methods to be used for the quality inspection of the welded joints and the required scope of testing are specified in the definition document
48、s (see DIN 65118-1). The imperfections detected during the tests shall not exceed the limits given in Table 1. 2) Reference numbers according to DIN EN ISO 4063. 8 DIN 29595:2007-04 7.2 Test methods 7.2.1 Visual and dimensional inspection The welds shall be examined visually using a magnifying glass (with 6 to 10 magnification), mirror or endo-scope. Specified dimensions shall be verified using adequate measuring instruments (e.g.
