Railway applications - Track - Acceptance of works - Part 2: Acceptance of reprofiling rails in plain line, switches, crossings and expansion devices

This part of EN 13231 series defines the technical requirements and measurements for the acceptance of works for longitudinal and / or transverse reprofiling of railway rail heads in plain line, switches and crossings and expansion devices.
It applies to Vignole rails of 46 kg/m and above according to EN 13674 1.

Bahnanwendungen - Oberbau - Abnahme von Arbeiten - Teil 2: Abnahme von reprofilierten Schienen im Gleis, Weichen, Kreuzungen und Schienenauszügen

Dieser Teil der Reihe EN 13231 legt die technischen Anforderungen und Messungen für die Abnahme von Arbeiten zur Längs- und/oder Querreprofilierung von Schienenköpfen in Gleisen, Weichen und Kreuzungen und Schienenauszügen fest.
Er gilt für Vignolschienen ab 46 kg/m und darüber nach EN 13674 1.

Applications ferroviaires - Voie - Réception des travaux - Partie 2 : Critères de réception des travaux de reprofilage des rails en voie et dans les appareils de voie

Le présent document spécifie les exigences techniques et les mesures relatives à la réception de travaux concernant le reprofilage longitudinal et/ou transversal des champignons de rails de chemin de fer en voie courante et dans les appareils de voie.
Ce document elle s'applique aux rails Vignole de masse supérieure ou égale à 46 kg/m conformes à l'EN 13674-1.

Železniške naprave - Zgornji ustroj proge - Prevzem del - 2. del: Prevzem reprofiliranih tirov na odprti progi, ostric, prehodov in razširjevalnih naprav

General Information

Status
Published
Public Enquiry End Date
31-Oct-2019
Publication Date
26-Nov-2020
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
26-Nov-2020
Due Date
31-Jan-2021
Completion Date
27-Nov-2020

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SLOVENSKI STANDARD
SIST EN 13231-2:2021
01-januar-2021
Nadomešča:
SIST EN 13231-3:2012
SIST EN 13231-4:2013
Železniške naprave - Zgornji ustroj proge - Prevzem del - 2. del: Prevzem
reprofiliranih tirov na odprti progi, ostric, prehodov in razširjevalnih naprav

Railway applications - Track - Acceptance of works - Part 2: Acceptance of reprofiling

rails in plain line, switches, crossings and expansion devices
Bahnanwendungen - Oberbau - Abnahme von Arbeiten - Teil 2: Abnahme von
reprofilierten Schienen im Gleis, Weichen, Kreuzungen und Schienenauszügen

Applications ferroviaires - Voie - Réception des travaux - Partie 2 : Critères de réception

des travaux de reprofilage des rails en voie et dans les appareils de voie
Ta slovenski standard je istoveten z: EN 13231-2:2020
ICS:
45.080 Tračnice in železniški deli Rails and railway
components
93.100 Gradnja železnic Construction of railways
SIST EN 13231-2:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 13231-2:2021
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SIST EN 13231-2:2021
EN 13231-2
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2020
EUROPÄISCHE NORM
ICS 93.100 Supersedes EN 13231-3:2012, EN 13231-4:2013
English Version
Railway applications - Track - Acceptance of works -
Part 2: Acceptance of reprofiling rails in plain line,
switches, crossings and expansion devices

Applications ferroviaires - Voie - Réception des travaux Bahnanwendungen - Oberbau - Abnahme von Arbeiten

- Partie 2 : Critères de réception des travaux de - Teil 2: Abnahme von reprofilierten Schienen im Gleis,

reprofilage des rails en voie et dans les appareils de Weichen, Kreuzungen und Schienenauszügen

voie
This European Standard was approved by CEN on 28 September 2020.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATIO N
EUROPÄISCHES KOMITEE FÜR NORMUN G
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13231-2:2020 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 13231-2:2021
EN 13231-2:2020 (E)
Contents Page

European foreword ....................................................................................................................................................... 4

1 Scope .................................................................................................................................................................... 5

2 Normative references .................................................................................................................................... 5

3 Terms and definitions ................................................................................................................................... 5

4 Longitudinal profile .................................................................................................................................... 13

4.1 Principle .......................................................................................................................................................... 13

4.2 Measurements required ............................................................................................................................ 13

4.3 Acceptance criteria for longitudinal profile ....................................................................................... 14

4.3.1 General ............................................................................................................................................................. 14

4.3.2 Peak-to-peak limit ....................................................................................................................................... 14

5 Transverse profile ....................................................................................................................................... 15

5.1 Principle .......................................................................................................................................................... 15

5.2 Areas in switches and crossings which are limited for reprofiling............................................ 15

5.3 Measurements required ............................................................................................................................ 15

5.4 Acceptance criteria for the transverse profile .................................................................................. 16

6 Metal removal ................................................................................................................................................ 17

6.1 Measurements required ............................................................................................................................ 17

6.2 Acceptance criteria for metal removal ................................................................................................. 17

7 Surface quality............................................................................................................................................... 18

8 Visual appearance: acceptance criteria ............................................................................................... 18

9 Rolling contact fatigue ................................................................................................................................ 18

Annex A (normative) Calculation of peak-to-peak values .......................................................................... 19

A.1 Calculation of the percentage of exceedances ................................................................................... 19

Annex B (normative) Method of periodic verification ................................................................................. 21

B.1 Method of periodic verification of approved instruments ............................................................ 21

B.2 Longitudinal profile .................................................................................................................................... 21

B.3 Transverse profile ....................................................................................................................................... 23

Annex C (normative) Procedures to verify reference instruments ........................................................ 28

C.1 Longitudinal profile .................................................................................................................................... 28

C.2 Transverse profile ....................................................................................................................................... 36

Annex D (normative) Procedures to demonstrate correlation of approved and reference

instruments .................................................................................................................................................... 38

D.1 Longitudinal profile .................................................................................................................................... 38

D.2 Transverse profile ....................................................................................................................................... 41

D.3 Surface quality............................................................................................................................................... 49

Annex E (normative) Calculation of cumulative density function and power spectral density

(PSD) of the amplitude of the longitudinal profile ........................................................................... 51

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SIST EN 13231-2:2021
EN 13231-2:2020 (E)

E.1 Calculation of cumulative density function of the amplitude of the longitudinal

profile ................................................................................................................................................................ 51

E.2 Calculation of the power spectral density of the amplitude of the longitudinal profile ..... 53

Annex F (normative) Rail surface quality measurement ............................................................................ 55

F.1 Requirements ................................................................................................................................................. 55

F.2 Calculation of the quality index (QI) ...................................................................................................... 55

F.3 Verification of the functional capability ............................................................................................... 56

F.4 Verification of the functional capability ............................................................................................... 56

F.5 Coordinate measuring machine (CMM) ................................................................................................ 57

F.6 Measurement of the comparison standard using the CMM ........................................................... 57

F.7 Analysis of data from CMM ........................................................................................................................ 57

F.8 Measurement of the comparison standard using the test instrument ...................................... 57

F.9 Maximum deviation between test instrument and CMM ............................................................... 57

Bibliography ................................................................................................................................................................. 58

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SIST EN 13231-2:2021
EN 13231-2:2020 (E)
European foreword

This document (EN 13231-2:2020) has been prepared by Technical Committee CEN/TC 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 May 2021, and conflicting national standards shall be

withdrawn at the latest by May 2021.

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 13231-3:2012 and EN 13231-4:2013. The main changes compared to the

previous edition are listed below:
— EN 13231-2 merges the previous EN 13231-2 and EN 13231-3;
— updated to display the state of the art;
— mistakes have been solved;
— Clause 7 is new.

This document is part of the series EN 13231 “Railway applications - Track - Acceptance of works” as

listed below:
— Part 1: Works on ballasted track - Plain line, switches and crossings

— Part 2: Acceptance of reprofiling rails in plain line, switches, crossings and expansion devices

— Part 5: Procedures for rail reprofiling in plain line, switches, crossings and expansion devices

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, Finland, France, Germany, Greece, Hungary, Iceland,

Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of

North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the

United Kingdom.
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SIST EN 13231-2:2021
EN 13231-2:2020 (E)
1 Scope

This document defines the technical requirements and measurements for the acceptance of works for

longitudinal and/or transverse reprofiling of railway rail heads in plain line, switches and crossings and

expansion devices.

This document applies to Vignole rails of 46 kg/m and above according to EN 13674-1.

2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1
reprofiling zones in switches

area where required reprofiling work is done on the switches depending on the position of the rail

within the switch

Note 1 to entry: There are three general areas of treatment as shown in Figure 1.

Key
○ welding/joint 2 zone G (closure panel)
1 zone F (switch panel) 3 zone H (crossing panel)
Figure 1 — Reprofiling zones in switches
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SIST EN 13231-2:2021
EN 13231-2:2020 (E)
3.2
reference points
points A, B and B that describe the area for the transverse rail head profile
1 2
Note 1 to entry: See Figure 2.
Key
1 angle of inclination 5 reference point B1 (see 3.25)
2 rail axis 6 reference point B (see 3.26)

3 reference line (see 3.23) 7 distance between point B1 and reference line (usually 14 mm)

4 reference point A (see 3.24) 8 angle between tangent at point B2 and reference line (usually 45°)

Figure 2 — Definition of terms, and determination of reference points A, B and B on the

1 2
transverse profile
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SIST EN 13231-2:2021
EN 13231-2:2020 (E)
3.3
reprofiling zone

part of the rail head that needs to be treated in the zone described by item 9 as in Figure 3

Note 1 to entry: See Figure 3.
Key
1 angle of inclination (see 3.6) 6 angle of 70°
2 rail axis 7 point C (field side) where the rail profile has an
angle of −5° with respect to reference line
3 reference line (see 3.23) 8 angle of 5° with respect to the reference line
4 reference point A (see 3.24) 9 reprofiling zone from C to C
1 2
5 point C (gauge corner) where the rail profile tangent
has an angle of 70° with respect to reference line
Figure 3 — Reprofiling zone
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SIST EN 13231-2:2021
EN 13231-2:2020 (E)
3.4
deviation of measured transverse profile
part described by item 10 as in Figure 4

Note 1 to entry: See Figure 4. In this example, the range of deviation is negative (measured profile below the

reference rail).
Key
1 angle of inclination (see 3.6) 6 reference profile
2 rail axis 7 measured profile
3 reference line (see 3.23) 8 point where X is maximum

4 reference point A – top of rail where deviation is zero 9 tangent to rail target profile at considered point

(see 3.24)

5 reference point B1 or B2 where deviation is zero (see 10 deviation between 6 and 7 at point 8 –

3.25 and 3.26) perpendicular to 9
Figure 4 — Deviation of measured transverse profile from reference profile
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SIST EN 13231-2:2021
EN 13231-2:2020 (E)
3.5
transverse profile measurement locations for hand-measuring systems in switches

locations for measurement of the transverse profile in a switch by a non-continuous method that are

defined in Figure 5
Note 1 to entry: See Figure 5.
Key
○ welding/joint 1-10 measuring points
A switch panel
B closure panel
C crossing panel
NOTE Point 1 is always on the left facing the switch towards the frog.

Figure 5 — Measuring points for transverse profile for hand-measuring systems in switches

3.6
angle of inclination of rail
nominal angle at which rail is laid; inclined towards the centre of the track

EXAMPLE: 0° (vertical rails), 2,86° (1:20 inclination), 1,91° (1:30 inclination), 1,43° (1:40 inclination), etc.

Note 1 to entry: See Figure 2.
3.7
approved instrument

instrument for measurement of longitudinal or transverse profile, the usage of which is justified by

correlation of its performance with that of a reference instrument in accordance with the defined

procedure
Note 1 to entry: For procedure to demonstrate correlation, see Annex B.
3.8
reference instrument

instrument for the measurement of longitudinal or transverse profile, the performance of which has

been verified in accordance with the procedure defined in Annex C
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SIST EN 13231-2:2021
EN 13231-2:2020 (E)
3.9
test instrument

instrument whose use as a reference instrument or an approved instrument is being tested

3.10
characteristic length

length on the rail travelled during one rotation of a grinding stone or milling wheel

3.11
class 1, class 2

classes of longitudinal profile differentiated by the proportion of a reprofiling site reaching a specified

standard
Note 1 to entry: For longitudinal profile, see 4.3.
3.12
class P, class Q, class R, class S

classes of transverse profile differentiated by the proportion of a reprofiling site reaching a specified

standard
Note 1 to entry: For transverse profile, see 5.4.
3.13
Quality class 1, quality class 2, quality class 3
classes of the surface quality of the reprofiled rail
3.14
cut-off wavelength

wavelength of a sinusoidal profile of which 50 % of the amplitude is transmitted by the profile filter

Note 1 to entry: Profile filters are identified by their cut-off wavelength value, see EN ISO 16610-21.

3.15
deviation of the measured profile

deviation between the measured transverse profile and the reference rail, measured normal to the

surface of the reference rail when the measured transverse profile and the reference rail are aligned at

points A and B or A and B , without rotation of either profile
1 2

Note 1 to entry: The deviation is considered positive when the measured transverse profile is above the

reference rail.
Note 2 to entry: For deviation, see Figure 4.
3.16
facet

flat sector of the transverse profile of a reprofiled rail produced by the reprofiling tool

3.17
primary profile

representation of the measured longitudinal profile before application of any profile filter

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SIST EN 13231-2:2021
EN 13231-2:2020 (E)
3.18
profile filter

electronic device or signal processing which separates profiles into long-wave and short-wave

components, or into components within a specified wavelength range
3.19
filtered profile
profile which results from applying a profile filter to the primary profile
3.20
peak-to-peak limit (ppl)

limit of the value in which the value of the filtered longitudinal profiles shall lie

Note 1 to entry: It is intended as the plus and minus values ± A in which a sinusoidal signal of amplitude A lies.

( )
3.21
percentage exceedance

percentage length of a test site over which a measurement of the amplitude of the filtered profile

exceeds a prescribed limit
3.22
phase correct profile filter

profile filter which does not cause phase shifts which lead to asymmetrical profile distortions

Note 1 to entry: For profile filter, see EN ISO 16610-21.
3.23
track section

continuous part of track with the same track geometry and the same track construction

3.24
range of deviation

difference between the maximum and minimum values of the deviation of the measured transverse

profile
Note 1 to entry: For measured profile, see Figure 4.
3.25
reference line

line normal to the track's longitudinal axis and tangential to the heads of both rails

3.26
reference point A

highest point of the rail referred to the opposite rail of the track where the reference line touches the

rail profile
Note 1 to entry: For specified angle of inclination, see Figure 2
3.27
reference point B
point on the gauge face of a reference rail 14 mm below the reference line
Note 1 to entry: For reference point B1, see Figure 2.
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SIST EN 13231-2:2021
EN 13231-2:2020 (E)
3.28
reference point B

point on the gauge corner of a reference rail at which a line which is tangential to the rail lies at an angle

of 45° to the reference line
Note 1 to entry: For reference point B2, see Figure 2.
3.29
reference profile

transverse profile to which rail is to be reprofiled, within the specified tolerances

3.30
reference rail

rail with the reference profile, at the desired angle of inclination relative to the reference line

Note 1 to entry: For reference rail, see Figure 2.
3.31
reprofiling

action that is undertaken to modify the longitudinal and/or transverse profile of a rail

3.32
reprofiling site
length of track where the rail is to be reprofiled
3.33
reprofiling zone

area of the rail head of a reference rail between the point at which the tangent to the rail lies at an angle

of 70° to the reference line, measured towards the gauge side of the rail, and the point at which the

tangent to the rail lies at an angle of 5° to the reference line, measured towards the field side of the rail

Note 1 to entry: For reprofiling zone, see Figure 3.
3.34
sampling interval

distance between successive points on the rail at which a continuous record of the traced profile is

sampled in order to produce the primary profile
3.35
traced profile
profile of the rail as recorded by the measuring system
3.36
transition length

initial and/or final section of a length of track where the validity of a measurement of longitudinal or

transverse profile is questionable for a variety of reasons, including settling of electronic and digital

components and circuits
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SIST EN 13231-2:2021
EN 13231-2:2020 (E)
4 Longitudinal profile
4.1 Principle

Measurements are made using either a reference instrument, see 3.8, or an approved instrument,

see 3.7. Approved instruments do not offer the same accuracy as reference instruments but are

generally adequate for the purpose of demonstrating compliance with the requirements of this

document.

NOTE An example of an approved instrument is the type of system used for routine corrugation

measurement. Some of the systems used on reprofiling trains fall into this category.

In accordance with current practice, limits are set on the magnitude of the irregularities that can remain

in track after a reprofiling operation. It is recognized, however, that it can be uneconomic to achieve

100 % compliance with these, particularly where isolated rail running surface defects, such as wheel

burn, exist prior to reprofiling. Two classes are therefore offered, differentiated by the percentage of the

reprofiled track meeting the specified criteria. Where isolated top faults exist, class 2 offers a lower cost

option compared to class 1 as it will be achieved with fewer passes. However, a larger number of

isolated non-compliant zones will remain in the reprofiled site.

Class 1 also includes limits for very short (10 mm to 30 mm) and very long (300 mm to 1 000 mm)

wavelength residual irregularities; these are not included in class 2. Where very short waves need to be

removed, in particular for noise reduction, it might also be necessary to specify a criterion for those

wavelengths.
For the necessary annual metrological check, see Annex D.
4.2 Measurements required

The longitudinal profile of the finished reprofiled rail shall be recorded continuously using either a

reference instrument or an approved instrument. Where independent verification is required a

reference instrument shall be used. All measurements undertaken in order to demonstrate compliance

with 4.3 shall be recorded

Due to the complex geometry and short length worked on in switches and crossings and expansion

devices manual measurement systems can be used alternatively. The rail containing the frog shall be

measured only in “Zone G”, see Figure 1; the opposite rail shall be measured in the total ground length.

Longitudinal profile measurements shall be made within a position of 15 mm laterally on the rail from

the reference point A to the gauge corner area, to produce the traced profile.

NOTE It is a known issue that some networks have corrugation on high rail gauge corner. This document

does not deal with this issue. IM and contractor can agree on measurement methods and acceptance criterion.

It is recommended that a digital form of the traced profile, the primary profile, be used for subsequent

analysis.

If such a system is out of order or not available recording details shall be settled in the contract.

The measurements can be undertaken immediately after work or at the latest within 8 days of

reprofiling or before the track has carried 0,3 MGT (Million Gross Tonnes) of traffic.

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SIST EN 13231-2:2021
EN 13231-2:2020 (E)
4.3 Acceptance criteria for longitudinal profile
4.3.1 General

Table 1 gives peak-to-peak limits to be fulfilled to a certain percentage that is given in Table 2. Table 1

and Table 2 together form the acceptance criteria.
4.3.2 Peak-to-peak limit

The primary or traced profile shall be processed to provide a filtered profile within each of the

wavelength ranges given in Table 1.
Table 1 — Peak-to-peak limits
Wavelength range 10 to 30 30 to 100 100 to 300 300 to 1 000
(mm)
peak-to-peak limit ±0,010 ±0,010 ±0,015 ±0,075
(mm)

The percentage of any reprofiling site (according to 3.32) in which the amplitude of the filtered profile

is within the value specified in Table 1 shall be calculated on its total length and shall not be less than

the values given in Table 2 for the class specified.

If on a reprofiling site a track section does not meet this requirement, it shall be clarified if track quality

has an influence on the grinding result. A strong indication for this is, if the failure to meet the

tolerances comes from an isolated short section of track (<50 m), instead of irregularities distributed

over the whole reprofiling site.

Table 2 — Minimum proportion of measurements within peak-to-peak limits according to

Table 1
Wavelength range 10 to 30 30 to 100 100 to 300 300 to 1 000
(mm)
Class 1 95 % 95 % 95 % 95 %
Class 2 No requirement 90 % 90 % No requirement

In plain line, the classification concerns the total length of each reprofiling section.

In switches, crossing and expansion devices, the classification concerns the total length (Zones F, G and

H in Figure 1) of the rail opposite the frog and Zone G only of the rail containing the frog.

No exceedances are allowed for stationary measurements.
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SIST EN 13231-2:2021
EN 13231-2:2020 (E)
5 Transverse profile
5.1 Principle

Measurements are made using either a reference instrument, see 3.8, or an approved instrument,

see 3.7. Approved instruments do not offer the same accuracy as reference instruments, but are

generally adequate for the purpose of demonstrating compliance with the requirements of this

document.

Reprofiling can be undertaken for a variety of reasons. Where reprofiling is undertaken purely for the

removal of corrugation, there could be less need for the rail to be reprofiled with precision. In other

cases, it could be necessary for the reprofiled rail to match closely the ideal profile, represented by the

reference rail, see 3.30. A range of classes is therefore included to enable the client to specify the level of

precision that is appropriate for the site to be reprofiled.

NOTE Where reprofiling is undertaken to improve conicity, class Q, see 5.4, is likely to be appropriate.

The match between the reprofiled rail and the profile of the reference rail is determined by aligning the

two at two points and measuring maximum difference between them, see Figure 4. For straight track,

these points of alignment generally approximate to the rail crown and the gauge point. On the high rail

of curves, this method is not applicable if side wear has occurred and an alternative method of

alignment is therefore used.
For the necessary annual metrological check, see Annex D.
5.2 Areas in switches and crossings which are limited for reprofiling

The areas where the switchblade touches stock rail (Zone F, see Figure 1) and the frog area (Zone H, see

Figure 1) cannot be reprofiled completely. The infrastructure manager can define applicable

restrictions.
5.3 Measurements required

The rail's transverse profile shall be measured using either a reference instrument, see 3.8, or an

approved instrument, se
...

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