EN 14730-1:2017

European Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Information to be supplied by the railway authority
5 Approval procedure
6 Re-approval following process changes
7 Laboratory tests
Annex A (informative) - Steps in approval
Annex B (informative) - Suggested sequence of laboratory
        Tests
Annex C (normative) - Procedure for Fry etching
Annex D (informative) - Procedure for measurement of
        surface hardness
Annex E (normative) - Procedure for slow bend test
Annex F (normative) - Procedure for recording test
        weld fracture face defects
Annex G (normative) - Ultrasonic inspection procedure
        on aluminothermic welds to be Sectioned
Annex H (normative) - Procedure for microscopic
        examination of the visible heat affected
        zone and fusion zone of welds
Annex I (normative) - Procedure for measurement
        of the heat softened zone width
Annex J (normative) - Fatigue test methods for
        aluminothermic welds
Annex K (informative) - Adeviations
Bibliography

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.