FprEN 13231-2

SLOVENSKI STANDARD
oSIST prEN 13231-2:2019
01-november-2019
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

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

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

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

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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

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

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13231-2:2019 E

European Foreword ...................................................................................................................................................... 3

1 Scope .................................................................................................................................................................... 4

2 Normative references .................................................................................................................................... 4

3 Terms and definitions ................................................................................................................................... 4

4 Longitudinal profile .................................................................................................................................... 12

4.1 Principle .......................................................................................................................................................... 12

4.2 Measurements required ............................................................................................................................ 12

4.3 Acceptance criteria for longitudinal profile ....................................................................................... 12

4.3.1 General ............................................................................................................................................................. 12

4.3.2 Peak-to-peak limit ....................................................................................................................................... 13

5 Transverse profile ....................................................................................................................................... 13

5.1 Principle .......................................................................................................................................................... 13

5.2 Areas in crossings which are limited for reprofiling ...................................................................... 14

5.3 Measurements required ............................................................................................................................ 14

5.4 Acceptance criteria for the transverse profile .................................................................................. 14

6 Metal removal ................................................................................................................................................ 15

6.1 Measurements required ............................................................................................................................ 15

6.2 Acceptance criteria for metal removal ................................................................................................. 15

7 Surface quality............................................................................................................................................... 16

8 Visual appearance: acceptance criteria ............................................................................................... 16

9 Rolling contact fatigue ................................................................................................................................ 16

Annex A (normative) Calculation of peak-to-peak values .......................................................................... 17

Annex B (normative) Method of periodic verification ................................................................................. 19

Annex C (normative) Procedures to verify reference instruments ........................................................ 26

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

instruments .................................................................................................................................................... 36

Annex E (normative) Calculation of Cumulative Density Function and Power Spectral

Density (PSD) of the amplitude of the longitudinal profile. ......................................................... 48

Annex F (normative) Rail surface quality measurement ............................................................................ 52

Bibliography ................................................................................................................................................................. 55

This document (prEN 13231-2:2019) has been prepared by Technical Committee CEN/TC 256 “Railway

This European Standard is one of the series EN 13231 “Railway applications — Track — Acceptance of

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

— Part 4: Acceptance of reprofiling rails in switches and crossings (to be replaced by Part 2)

— Part 5: Procedures for rail reprofiling 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

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

switches require different reprofiling work 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.

3 Reference line (see 3.23) 7 Distance between point B and reference line (usually

4 Reference point A (see 3.24) 8 Angle between tangent at point B and reference line

Figure 2 — Definition of terms, and determination of reference points A, B1 and B2 on the

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

4 Reference point A – top of rail where deviation is 9 Tangent to rail target profile at considered point

5 Reference point B or B where deviation is zero 10 Deviation between 6 and 7 at point 8 –

the transverse profile can be measured with a hand measuring system at 10 measuring locations

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

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

Note 2 to entry: For rail which is laid in non-canted track, the angle of inclination of the rail is equal to the angle

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

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

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

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

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 11562.

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; the deviation is considered positive

approximate plane sector of the profile of a reprofiled rail produced by the reprofiling tool

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

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

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

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

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

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

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

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

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

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

point on the gauge face of a reference rail with a distance of 14 mm below the reference line

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

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

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

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

continuous length of track where the rail is to be reprofiled excluding level crossings and switches and

area of the railhead 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

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

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

initial 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

Measurements are made using either a reference instrument, see 3.22, 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

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

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

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

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

joints 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 fixed position of 15 mm laterally on the rail

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

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.

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

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

The percentage of any reprofiling site (according to 3.30) 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

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

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

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.

Measurements are made using either a reference instrument, see 3.22, 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

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 3.28. A range of classes is therefore included to enable the client to specify the level of

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

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

The rail's transverse profile shall be measured using either a reference instrument, see 3.22, or an

approved instrument, see 3.7. Where independent verification is required, a reference instrument shall

be used whereby measurements of each rail shall be made at an interval of not less than 10 m

throughout the reprofiling site. A deviation of 0,1 mm between the reference instrument and approved

All measurements undertaken in order to demonstrate compliance with 5.4 shall be recorded.

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 Tons) of traffic.

NOTE It is best practice for measurements to be made immediately after re-profiling.

After reprofiling rails in switches, crossings and expansion devices, additional verifications can be

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

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.

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

Each measured profile shall be aligned with the appropriate reference rail so that the reference points A

and B , or A and B (see Figure 2) on the reference rail coincide with points on the measured profile.

The percentage of measured values in any reprofiling site according to 3.30, in which the range of

deviation is less than 0,4 mm, 0,6 mm, 1,0 mm and 1,7 mm, shall be calculated on the total length of the

reprofiling site and shall not be less than the values given in Table 3 for the class specified.

The transverse reprofiling shall be specified as one of the four classes as shown in Table 3. For each

class, a division of this range between a positive and negative tolerance shall also be specified. The

percentage of measurements for which the deviation exceeds the range stated shall not exceed the

For example, if reprofiling of class R and a tolerance range of 1,0 mm apportioned as + 0,4 mm/- 0,6 mm

were specified, at least 85 % of measurements should deviate by less than + 0,4 mm/- 0,6 mm from the

The maximum positive deviations shall be specified, e.g. for the range of deviation 0,6 mm:

The tolerance zone width tends towards 0 at the reference points, at the field side only negative

In switches, crossings and expansion devices when continuously working measurement systems are

used, the rail containing the frog shall be measured only in Zone G, see Figure 1, and only if this area is

longer than 30 m. The opposite rail shall be measured in the total ground length. With spot-checks

systems, one recording per rail shall be made in front (measurement points 1 and 2) of the switch, one

in the centre of the intermediate rail (measurement points 3 and 4 for the main track and, if applicable,