1、BS EN 14730-1:2017Railway applications Track Aluminothermic welding of railsPart 1: Approval of welding processesBSI Standards PublicationBS EN 14730-1:2017 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 14730-1:2017. It supersedes BS EN 14730-1:2006+A1:2010 wh
2、ich is withdrawn.The UK participation in its preparation was entrusted to Technical Committee RAE/2, Railway Applications - Track.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provision
3、s of a contract. Users are responsible for its correct application. The British Standards Institution 2017.Published by BSI Standards Limited 2017ISBN 978 0 580 85802 4 ICS 25.160.10; 45.080; 93.100 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standar
4、d was published under the authority of the Standards Policy and Strategy Committee on 31 March 2017.Amendments/corrigenda issued since publicationDate Text affectedBS EN 14730-1:2017g3g3g3g8g24g21g18g19g8g4g17g3g22g23g4g17g7g4g21g7g3g17g18g21g16g8g3g8g24g21g18g19g50g8g17g17g8g3g8g24g21g18g19g34g12g2
5、2g6g11g8g3g17g18g21g16g3EN 14730-1 g3 g3g3 g16g131g148g133g138g3g884g882g883g889g3g12g6g22g3g884g887g484g883g888g882g484g883g882g482g3g891g885g484g883g882g882g3 g22g151g146g135g148g149g135g134g135g149g3g8g17g3g883g886g889g885g882g486g883g483g884g882g882g888g938g4g883g483g884g882g883g882g8g144g137g14
6、2g139g149g138g3g25g135g148g149g139g145g144g3g3g21g131g139g142g153g131g155g3g131g146g146g142g139g133g131g150g139g145g144g149g3g486g3g23g148g131g133g141g3g486g3g4g142g151g143g139g144g145g150g138g135g148g143g139g133g3g153g135g142g134g139g144g137g3g145g136g3g148g131g139g142g149g3g486g3g19g131g148g150g3g
7、883g483g3g4g146g146g148g145g152g131g142g3g145g136g3g153g135g142g134g139g144g137g3g146g148g145g133g135g149g149g135g149g3g4g146g146g142g139g133g131g150g139g145g144g149g3g136g135g148g148g145g152g139g131g139g148g135g149g3g486g3g25g145g139g135g3g486g3g22g145g151g134g131g137g135g3g134g135g149g3g148g131g13
8、9g142g149g3g146g131g148g3g131g142g151g143g139g144g145g150g138g135g148g143g139g135g3g486g3g19g131g148g150g139g135g3g883g483g3g4g146g146g148g145g132g131g150g139g145g144g3g134g135g149g3g146g148g145g133g177g134g177g149g3g134g135g3g149g145g151g134g131g137g135g3g3 g5g131g138g144g131g144g153g135g144g134g15
9、1g144g137g135g144g3g486g3g18g132g135g148g132g131g151g3g486g3g4g142g151g143g139g144g145g150g138g135g148g143g139g149g133g138g135g149g3g22g133g138g153g135g139g233g135g144g3g152g145g144g3g22g133g138g139g135g144g135g144g3g486g3g23g135g139g142g3g883g483g3g29g151g142g131g149g149g151g144g137g3g134g135g148g3
10、g22g133g138g153g135g139g233g152g135g148g136g131g138g148g135g144g3g23g138g139g149g3g8g151g148g145g146g135g131g144g3g22g150g131g144g134g131g148g134g3g153g131g149g3g131g146g146g148g145g152g135g134g3g132g155g3g6g8g17g3g145g144g3g883g885g3g4g151g137g151g149g150g3g884g882g883g888g484g3g3g3g6g8g17g3g143g13
11、5g143g132g135g148g149g3g131g148g135g3g132g145g151g144g134g3g150g145g3g133g145g143g146g142g155g3g153g139g150g138g3g150g138g135g3g6g8g17g512g6g8g17g8g15g8g6g3g12g144g150g135g148g144g131g142g3g21g135g137g151g142g131g150g139g145g144g149g3g153g138g139g133g138g3g149g150g139g146g151g142g131g150g135g3g150g1
12、38g135g3g133g145g144g134g139g150g139g145g144g149g3g136g145g148g3g137g139g152g139g144g137g3g150g138g139g149g3g8g151g148g145g146g135g131g144g3g22g150g131g144g134g131g148g134g3g150g138g135g3g149g150g131g150g151g149g3g145g136g3g131g3g144g131g150g139g145g144g131g142g3g149g150g131g144g134g131g148g134g3g15
13、3g139g150g138g145g151g150g3g131g144g155g3g131g142g150g135g148g131g150g139g145g144g484g3g24g146g486g150g145g486g134g131g150g135g3g142g139g149g150g149g3g131g144g134g3g132g139g132g142g139g145g137g148g131g146g138g139g133g131g142g3g148g135g136g135g148g135g144g133g135g149g3g133g145g144g133g135g148g144g139
14、g144g137g3g149g151g133g138g3g144g131g150g139g145g144g131g142g3g149g150g131g144g134g131g148g134g149g3g143g131g155g3g132g135g3g145g132g150g131g139g144g135g134g3g145g144g3g131g146g146g142g139g133g131g150g139g145g144g3g150g145g3g150g138g135g3g6g8g17g486g6g8g17g8g15g8g6g3g16g131g144g131g137g135g143g135g1
15、44g150g3g6g135g144g150g148g135g3g145g148g3g150g145g3g131g144g155g3g6g8g17g3g143g135g143g132g135g148g484g3g3g23g138g139g149g3g8g151g148g145g146g135g131g144g3g22g150g131g144g134g131g148g134g3g135g154g139g149g150g149g3g139g144g3g150g138g148g135g135g3g145g136g136g139g133g139g131g142g3g152g135g148g149g13
16、9g145g144g149g3g523g8g144g137g142g139g149g138g481g3g9g148g135g144g133g138g481g3g10g135g148g143g131g144g524g484g3g4g3g152g135g148g149g139g145g144g3g139g144g3g131g144g155g3g145g150g138g135g148g3g142g131g144g137g151g131g137g135g3g143g131g134g135g3g132g155g3g150g148g131g144g149g142g131g150g139g145g144g3
17、g151g144g134g135g148g3g150g138g135g3g148g135g149g146g145g144g149g139g132g139g142g139g150g155g3g145g136g3g131g3g6g8g17g3g143g135g143g132g135g148g3g139g144g150g145g3g139g150g149g3g145g153g144g3g142g131g144g137g151g131g137g135g3g131g144g134g3g144g145g150g139g136g139g135g134g3g150g145g3g150g138g135g3g6g
18、8g17g486g6g8g17g8g15g8g6g3g16g131g144g131g137g135g143g135g144g150g3g6g135g144g150g148g135g3g138g131g149g3g150g138g135g3g149g131g143g135g3g149g150g131g150g151g149g3g131g149g3g150g138g135g3g145g136g136g139g133g139g131g142g3g152g135g148g149g139g145g144g149g484g3g3g6g8g17g3g143g135g143g132g135g148g149g3
19、g131g148g135g3g150g138g135g3g144g131g150g139g145g144g131g142g3g149g150g131g144g134g131g148g134g149g3g132g145g134g139g135g149g3g145g136g3g4g151g149g150g148g139g131g481g3g5g135g142g137g139g151g143g481g3g5g151g142g137g131g148g139g131g481g3g6g148g145g131g150g139g131g481g3g6g155g146g148g151g149g481g3g6g1
20、56g135g133g138g3g21g135g146g151g132g142g139g133g481g3g7g135g144g143g131g148g141g481g3g8g149g150g145g144g139g131g481g3g9g139g144g142g131g144g134g481g3g9g145g148g143g135g148g3g28g151g137g145g149g142g131g152g3g21g135g146g151g132g142g139g133g3g145g136g3g16g131g133g135g134g145g144g139g131g481g3g9g148g131
21、g144g133g135g481g3g10g135g148g143g131g144g155g481g3g10g148g135g135g133g135g481g3g11g151g144g137g131g148g155g481g3g12g133g135g142g131g144g134g481g3g12g148g135g142g131g144g134g481g3g12g150g131g142g155g481g3g15g131g150g152g139g131g481g3g15g139g150g138g151g131g144g139g131g481g3g15g151g154g135g143g132g14
22、5g151g148g137g481g3g16g131g142g150g131g481g3g17g135g150g138g135g148g142g131g144g134g149g481g3g17g145g148g153g131g155g481g3g19g145g142g131g144g134g481g3g19g145g148g150g151g137g131g142g481g3g21g145g143g131g144g139g131g481g3g22g135g148g132g139g131g481g3g22g142g145g152g131g141g139g131g481g3g22g142g145g1
23、52g135g144g139g131g481g3g22g146g131g139g144g481g3g22g153g135g134g135g144g481g3g22g153g139g150g156g135g148g142g131g144g134g481g3g23g151g148g141g135g155g3g131g144g134g3g24g144g139g150g135g134g3g14g139g144g137g134g145g143g484g3g3g3g3g3g8g24g21g18g19g8g4g17g3g6g18g16g16g12g23g23g8g8g3g9g18g21g3g22g23g4g
24、17g7g4g21g7g12g29g4g23g12g18g17g3g6g18g16g12g23g50g3g8g24g21g18g19g50g8g17g3g7g8g3g17g18g21g16g4g15g12g22g4g23g12g18g17g3g8g24g21g18g19g34g12g22g6g11g8g22g3g14g18g16g12g23g8g8g3g9g111g21g3g17g18g21g16g24g17g10g3g3g3g3CEN-CENELECg3Management Centre: Avenue Marnix 17, B-1000 Brussels g825g3g884g882g88
25、3g889g3g6g8g17g3 g4g142g142g3g148g139g137g138g150g149g3g145g136g3g135g154g146g142g145g139g150g131g150g139g145g144g3g139g144g3g131g144g155g3g136g145g148g143g3g131g144g134g3g132g155g3g131g144g155g3g143g135g131g144g149g3g148g135g149g135g148g152g135g134g3g153g145g148g142g134g153g139g134g135g3g136g145g14
26、8g3g6g8g17g3g144g131g150g139g145g144g131g142g3g16g135g143g132g135g148g149g484g3g21g135g136g484g3g17g145g484g3g8g17g3g883g886g889g885g882g486g883g483g884g882g883g889g3g8BS EN 14730-1:2017EN 14730-1:2017 (E) 2 Contents Page European foreword . 5 Introduction 6 1 Scope 7 2 Normative references 7 3 Term
27、s and definitions . 7 4 Information to be supplied by the railway authority. 8 5 Approval procedure . 8 5.1 General 8 5.2 Process identification 8 5.3 General requirements . 9 5.4 Documents to be submitted with the request for approval . 9 5.4.1 The process manual . 9 5.4.2 Drawing with the required
28、 measurements 10 Figure 1 Dimensions taken from mould pattern . 10 5.4.3 Chemical analysis ranges and tolerances 11 5.5 Initial compliance testing 11 Table 1 Rail profile groups 11 Table 2 Testing scheme . 11 5.6 Extension of initial compliance testing 12 5.7 Preparation and allocation of test welds
29、 . 12 6 Re-approval following process changes 13 6.1 Changes requiring approval . 13 6.1.1 Geometric parameters . 13 6.1.2 Crucible system . 13 6.1.3 Tapping system . 13 6.1.4 Pre-heating system 13 6.1.5 Portion . 13 6.1.6 Welding gap 14 6.2 Test requirements for re-approval following process change
30、s 14 Table 3 process changes 15 7 Laboratory tests 17 7.1 Visual surface examination 17 7.1.1 As-cast weld surface 17 Table 4 Maximum dimensions of slag or sand defects 17 7.1.2 Ground weld surface . 17 7.1.3 Visible heat affected zone 17 7.2 Running surface hardness test 17 Table 5 Ranges for runni
31、ng surface hardness tests 18 7.3 Slow bend test . 18 7.4 Internal examination 18 7.4.1 Weld soundness 18 BS EN 14730-1:2017g8g17g3g883g886g889g885g882g487g883g483g884g882g883g889g3g525g8g5262BS EN 14730-1:2017EN 14730-1:2017 (E) 3 Figure 2 Transverse section of head, web and foot of the rail 19 Figu
32、re 3 Sectioning of Welds . 20 7.4.2 Fusion zone Shape and dimension 21 Figure 4 Shape of fusion zone on the etched longitudinal vertical section 21 7.4.3 Fusion zone . 21 7.4.4 Heat softened zone width 22 Table 6 Ranges of heat softened zone 22 7.5 Fatigue test 22 7.6 Chemical analysis . 22 Table 7
33、Chemical composition 23 Annex A (informative) Steps in approval 24 Annex B (informative) Suggested sequence of laboratory test . 25 Annex C (normative) Procedure for Fry etching 26 Annex D (informative) Procedure for measurement of surface hardness 27 Figure D.1 Location of surface hardness tests .
34、27 Annex E (normative) Procedure for slow bend test 28 Figure E.1 Slow bend test schematic . 28 Annex F (normative) Procedure for recording test weld fracture face defects 29 Figure F.1 Rail profile grid . 30 Annex G (normative) Ultrasonic inspection procedure on aluminothermic welds to be sectioned
35、 31 G.1 General . 31 G.2 Test equipment 31 G.3 Preparation of samples 31 G.4 Adjustment 31 G.5 Testing 32 G.6 Reporting . 32 Annex H (normative) Procedure for microscopic examination of the visible heat affected zone and fusion zone of welds . 33 Figure H.1 Scheme for taking samples for microscopic
36、examination 33 Annex I (normative) Procedure for measurement of the heat softened zone width 34 I.1 Measurement of hardness . 34 Figure I.1 Longitudinal hardness measurement 34 I.2 Evaluation of hardness data . 34 I.2.1 General . 34 Figure I.2 Typical hardness profile . 35 I.2.2 Mean hardness of par
37、ent rail . 35 I.2.3 Measurement hardness line . 35 BS EN 14730-1:2017g8g17g3g883g886g889g885g882g487g883g483g884g882g883g889g3g525g8g5263BS EN 14730-1:2017EN 14730-1:2017 (E) 4 I.2.4 Heat softened zone width measurement . 35 I.2.5 Parent rail hardness variation 35 Annex J (normative) Fatigue test me
38、thods for aluminothermic welds . 36 J.1 General . 36 J.2 Test equipment . 36 Figure J.1 Fatigue test arrangement . 36 J.3 Calibration procedure 37 J.4 Fatigue test results 37 J.4.1 General . 37 J.4.2 Staircase testing method . 37 J.4.2.1 Test pieces 37 J.4.2.2 Procedure 37 J.4.2.3 Data analysis 38 J
39、.4.2.4 Acceptance criteria 39 J.4.3 Example of the data analysis of a fatigue strength determination by the staircase method . 39 Table J.1 Experimental results . 39 J.4.4 Past-the-post testing method . 40 J.4.4.1 Test pieces 40 J.4.4.2 Procedure 40 J.4.4.3 Information to be reported 40 J.4.4.4 Acce
40、ptance criterion . 40 Annex K (informative) Adeviations 41 Bibliography . 42 BS EN 14730-1:2017g8g17g3g883g886g889g885g882g487g883g483g884g882g883g889g3g525g8g5264BS EN 14730-1:2017EN 14730-1:2017 (E) 5 European foreword This document (EN 14730-1:2017) has been prepared by Technical Committee CEN/TC
41、 256 “Railway applications”, the secretariat of which is held by DIN. 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 September 2017, and conflicting national standards shall be withdrawn at the l
42、atest by September 2017. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 14730-1:2006+A1:2010. The European Standard EN 1
43、4730 “Railway applications Track Aluminothermic welding of rails” is composed of two parts: Part 1: Approval of welding processes Part 2: Qualification of aluminothermic welders, approval of contractors and acceptance of welds This document has been prepared under a mandate given to CEN by the Europ
44、ean Commission and the European Free Trade Association. According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Fin
45、land, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 14730-1:2017g8g17
46、g3g883g886g889g885g882g487g883g483g884g882g883g889g3g525g8g5265BS EN 14730-1:2017EN 14730-1:2017 (E) 6 Introduction This standard defines the approval procedure for aluminothermic welding processes for rail welding through laboratory tests of welds produced in a workshop. This laboratory approval wi
47、ll provide the railway authority with sufficient information for tests in the track if required. BS EN 14730-1:2017g8g17g3g883g886g889g885g882g487g883g483g884g882g883g889g3g525g8g5266BS EN 14730-1:2017EN 14730-1:2017 (E) 7 1 Scope This European Standard defines the laboratory tests and requirements
48、for approval of an aluminothermic welding process using welds produced in workshop conditions. It applies to the joining of new Vignole rails as described in EN 13674-1 of the same profile and steel grade. Compliance with the requirements of this standard does not of itself ensure the suitability of
49、 a welding process for specific conditions of track and traffic. The standard does not cover welds made between different rail sections, differently worn rails and different rail grades. In addition to the definitive requirements this standard also requires the items detailed in Clause 4 to be documented. For compliance with this standard, it is important that both the definitive requirements and the documented items be satisfied. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document a
