SN EN 13231-3 : 2012

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Longitudinal profile
  4.1 Principle
  4.2 Measurements required
  4.3 Acceptance criteria for longitudinal profile
      4.3.1 General
      4.3.2 Moving average of RMS amplitudes
      4.3.3 Moving average of peak-to-peak amplitude
      4.3.4 Number of irregularities exceeding a
             specified amplitude
5 Transverse profile
  5.1 Principle
  5.2 Measurements required
  5.3 Acceptance criteria for the transverse profile
6 Metal removal
  6.1 Measurements required
  6.2 Acceptance criteria for metal removal
7 Surface roughness
8 Visual appearance: acceptance criteria
Annex A (informative) Procedures to verify reference
                      instruments
  A.1 Longitudinal profile
      A.1.1 Principle
      A.1.2 Calibration beam
      A.1.3 Coordinate Measuring Machine (CMM)
      A.1.4 Measurement of the calibration beam using
             the CMM
      A.1.5 Data analysis
      A.1.6 Acceptance of calibration beam
      A.1.7 Measurement of the calibration beam using the
             test instrument
      A.1.8 Data analysis using the test instrument
      A.1.9 Acceptance criteria for reference instruments
      A.1.10 Test report
  A.2 Transverse profile
      A.2.1 Principle
      A.2.2 Calibration jig
      A.2.3 Coordinate measuring machine (CMM)
      A.2.4 Calibration jig verification
      A.2.5 Rail measurements using the test instrument
      A.2.6 Acceptance of test instruments
      A.2.7 Test report
Annex B (informative) Procedures to demonstrate correlation
                      of approved and reference instruments
  B.1 Longitudinal profile
      B.1.1 Principle
      B.1.2 Characteristics of the test sites
      B.1.3 Measurements required
      B.1.4 Data analysis
      B.1.5 Acceptance criteria for approved instruments
      B.1.6 Test report
  B.2 Transverse profile
      B.2.1 Principle
      B.2.2 Characteristics of the test sites
      B.2.3 Measurements required
      B.2.4 Data analysis
      B.2.5 Acceptance criteria for approved instruments
      B.2.6 Test report
Annex C (informative) Example of acceptance documentation
                      for rail re-profiling work
Annex D (informative) Calculation of moving average RMS and
                      moving average peak-to-peak values
  D.1 Moving average RMS values
  D.2 Moving average peak-to-peak values
Bibliography

Lays down the technical requirements and the measurements to be made for the acceptance of work to re-profile both longitudinally and transversely the heads of railway rails, including the parts of switches and crossings that can be reprofiled.