NBN EN 14730-1 : 2007 + A1 2010

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Information to be supplied by the railway authority
5 Approval procedure
  5.1 General
  5.2 Process identification
  5.3 General requirements
  5.4 Initial compliance testing
  5.5 Extension of initial compliance testing
  5.6 Documents to be submitted with the request for approval
      5.6.1 The process manual
      5.6.2 Drawing with the required measurements
      5.6.3 Chemical analysis ranges and tolerances
  5.7 Preparation and allocation of test welds
6 Re-approval following process changes
7 Laboratory tests
  7.1 Visual surface examination
      7.1.1 As cast weld surface
      7.1.2 Ground weld surface
      7.1.3 Visible heat affected zone
  7.2 Running surface hardness test
  7.3 Slow bend test
  7.4 Internal examination
      7.4.1 Weld soundness
      7.4.2 Fusion zone - shape and dimension
      7.4.3 Microscopic examination
      7.4.4 Heat softened zone width
  7.5 Fatigue test
  7.6 Chemical analysis
Annex A (informative) Steps in approval
Annex B (informative) Suggested sequence of laboratory tests
Annex C (normative) Ultrasonic testing procedure for
                      aluminothermic welds in rail
        C.1 A test of the head zone of the weld (non-planar
            defects)
        C.2 A test of the head zone of the weld (planar defects)
        C.3 A test of the head and web zone of the weld (planar
            defects)
        C.4 A test of the middle zone of the foot of the weld
        C.5 A test of the ankle zone of the foot of the weld
        C.6 A test of the toe zone of the foot of the weld
Annex D (normative) Procedure for FRY etching
Annex E (normative) Procedure for measurement of surface hardness
Annex F (normative) Procedure for slow bend test
Annex G (normative) Procedure for recording test weld fracture
                      face defects
Annex H (normative) Ultrasonic inspection procedure on
                      aluminothermic welds to be sectioned
        H.1 Principle
        H.2 Apparatus
        H.3 Preparation of samples
        H.4 Calibration
        H.5 Testing
        H.6 Reporting
Annex I (normative) Procedure for microscopic examination of
                      the visible heat affected zone and fusion
                      zone of welds
Annex J (normative) Procedure for measurement of the heat
                      softened zone width
        J.1 Measurement of hardness
        J.2 Evaluation of hardness data
            J.2.1 General
            J.2.2 Mean hardness of parent rail
            J.2.3 Measurement hardness line
            J.2.4 Heat softened zone width measurement
            J.2.5 Parent rail hardness variation
Annex K (normative) Fatigue test methods for aluminothermic welds
        K.1 Scope
        K.2 Test equipment
        K.3 Calibration procedure
            K.3.1 General
            K.3.2 Test piece
            K.3.3 Test piece preparation
            K.3.4 Instrumentation
            K.3.5 Procedure
        K.4 Fatigue test method
            K.4.1 General
            K.4.2 Staircase testing method
            K.4.3 Example of the data analysis of a fatigue
                  strength determination by the staircase method
            K.4.4 Past-the-post testing method
Annex L (informative) A-deviations

Specifies the laboratory tests and requirements for approval of an aluminothermic welding process using welds produced in workshop conditions.