EN 14730-1:2017
(Main)Railway applications - Track - Aluminothermic welding of rails - Part 1: Approval of welding processes
Railway applications - Track - Aluminothermic welding of rails - Part 1: Approval of welding processes
This European Standard defines the laboratory tests and requirements 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 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.
Bahnanwendungen - Oberbau - Aluminothermisches Schweißen von Schienen - Teil 1: Zulassung der Schweißverfahren
Diese Norm legt Laborprüfungen und Anforderungen zur Zulassung eines aluminothermischen Schweiß-verfahrens unter Verwendung von Schweißungen fest, die unter Werkstattbedingungen hergestellt wurden.
Diese Norm umfasst die Verbindung von Vignolschienen (wie in EN 13674-1 beschrieben) des gleichen Profils und der gleichen Stahlsorte.
Die Erfüllung der Anforderungen dieser Norm bedingt jedoch nicht notwendigerweise die Eignung des Schweißprozesses unter den spezifischen Bedingungen von Oberbau und Betrieb.
Die Norm berücksichtigt keine Schweißungen unterschiedlicher Schienenquerschnitte, unter¬schiedlich abgenutzter Schienen und unterschiedlicher Stahlsorten.
Zusätzlich zu den in dieser Norm festgelegten Anforderungen sind gleichfalls die in Abschnitt 4 aufgeführten Angaben zu dokumentieren. Für die Konformität mit dieser Norm ist es wichtig, sowohl die festgelegten Anforderungen als auch die Dokumentation der Angaben zu erfüllen.
Applications ferroviaires - Voie - Soudage des rails par aluminothermie - Partie 1: Approbation des procédés de soudage
La présente norme européenne définit les essais de laboratoire et les exigences pour l’approbation d’un procédé de soudage des rails par aluminothermie effectués dans des conditions opératoires d’atelier.
Elle s’applique à l’assemblage de rails Vignole neufs tels que décrits dans l'EN13674-1, de même profil et de même nuance d’acier.
La conformité aux exigences de la présente norme n’assure pas par elle-même l’aptitude à l’emploi d’un procédé de soudage dans des conditions spécifiques de voie ferrée et de trafic.
La présente norme ne s'applique pas au soudage des rails de profils, d'usures ou de nuances différents.
Outre les exigences définitives, la présente norme exige également que les éléments détaillés à l’Article 4 soient documentés. Pour être conforme à la présente norme, il est important que les exigences définitives ainsi que les éléments à documenter soient remplis.
Železniške naprave - Zgornji ustroj proge - Aluminotermično varjenje tirnic - 1. del: Odobritev varilnega postopka
Ta dokument opredeljuje laboratorijske preskuse in zahteve za odobritev postopka aluminotermičnega varjenja z uporabo zvarov, izdelanih v delavnici.
Uporablja se za združevanje novih tirnic Vignole, kot je opisano v standardu EN 13674-1, istega profila in razreda
jekla.
Skladnost z zahtevami iz tega standarda sama po sebi še ne zagotavlja ustreznosti postopka varjenja za določene pogoje glede proge in prometa.
Standard ne obravnava zvarov, izdelanih iz različnih delov tirnic, različno obrabljenih tirnic
ali različnih razredov tirnic.
Poleg dokončnih zahtev ta standard zahteva tudi, da so postavke, opredeljene v točki 4, dokumentirane. Za skladnost s tem standardom je pomembno, da so izpolnjene tako dokončne zahteve kot dokumentirane postavke.
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2017
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SIST EN 14730-1:2007+A1:2010
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Railway applications - Track - Aluminothermic welding of rails - Part 1: Approval of
welding processes
Bahnanwendungen - Oberbau - Aluminothermisches Schweißen von Schienen - Teil 1:
Zulassung der Schweißverfahren
Applications ferroviaires - Voie - Soudage des rails par aluminothermie - Partie 1:
Approbation des procédés de soudage
Ta slovenski standard je istoveten z: EN 14730-1:2017
ICS:
25.160.10 Varilni postopki in varjenje Welding processes
45.080 7UDþQLFHLQåHOH]QLãNLGHOL Rails and railway
components
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 14730-1
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2017
EUROPÄISCHE NORM
ICS 25.160.10; 93.100 Supersedes EN 14730-1:2006+A1:2010
English Version
Railway applications - Track - Aluminothermic welding of
rails - Part 1: Approval of welding processes
Applications ferroviaires - Voie - Soudage des rails par Bahnanwendungen - Oberbau - Aluminothermisches
aluminothermie - Partie 1: Approbation des procédés Schweißen von Schienen - Teil 1: Zulassung der
de soudage Schweißverfahren
This European Standard was approved by CEN on 13 August 2016.
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
concerning 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 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14730-1:2017 E
worldwide for CEN national Members.
Contents Page
European foreword . 5
Introduction . 6
1 Scope . 7
2 Normative references . 7
3 Terms 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 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 . 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 changes . 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 running surface hardness tests. 18
7.3 Slow bend test . 18
7.4 Internal examination . 18
7.4.1 Weld soundness . 18
Figure 2 — Transverse section of head, web and foot of the rail . 19
Figure 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 — 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 . 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 . 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 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 parent ra
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