CEN/TS 15427-2-2:2023

SLOVENSKI STANDARD
01-december-2023
Nadomešča:
SIST-TS CEN/TS 15427-2-2:2021
Železniške naprave - Trenje na stiku kolo-tirnica - 2-2. del: Lastnosti in
karakteristike - Materiali za zgornjo površino tirnic
Railway applications - Wheel/Rail friction management - Part 2-2: Properties and
Characteristics - Top of Rail materials
Bahnanwendungen - Reibungsmanagement zwischen Rad und Schiene - Teil 2-2:
Eigenschaften und Merkmale - Kraftschlussmodifikatoren
Applications ferroviaires - Gestion des frottements roue/rail - Partie 2-2 : Propriétés et
caractéristiques - Lubrifiants de tête de rail
Ta slovenski standard je istoveten z: CEN/TS 15427-2-2:2023
ICS:
45.040 Materiali in deli za železniško Materials and components
tehniko for railway engineering
45.080 Tračnice in železniški deli Rails and railway
components
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

CEN/TS 15427-2-2
TECHNICAL SPECIFICATION
SPÉCIFICATION TECHNIQUE
October 2023
TECHNISCHE SPEZIFIKATION
ICS 45.080; 45.120 Supersedes CEN/TS 15427-2-2:2021
English Version
Railway applications - Wheel/rail friction management -
Part 2-2: Properties and characteristics - Top of rail
materials
Applications ferroviaires - Gestion des frottements Bahnanwendungen - Reibungsmanagement zwischen
roue/rail - Partie 2-2 : Propriétés et caractéristiques - Rad und Schiene - Teil 2-2: Eigenschaften und
Lubrifiants de tête de rail Merkmale - Kraftschlussmodifikatoren
This Technical Specification (CEN/TS) was approved by CEN on 9 July 2023 for provisional application.

The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to
submit their comments, particularly on the question whether the CEN/TS can be converted into a European Standard.

CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS
available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in
parallel to the CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached.

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, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TS 15427-2-2:2023 E
worldwide for CEN national Members.

Contents Page
European foreword .4
Introduction .6
1 Scope .7
2 Normative references .7
3 Terms and definitions .8
4 Design requirements . 10
5 Technical specification and product approval . 10
5.1 Introduction . 10
5.2 Product specification . 10
5.3 Technical file . 11
6 Control and monitoring of product . 11
6.1 Manufacturing process . 11
6.2 Composition of material . 11
6.3 Routine tests . 11
6.4 Additional measures . 11
7 Technical datasheet. 11
7.1 General . 11
7.2 Liquid based material characteristics . 11
7.3 Solid based material characteristics . 12
8 Packaging, labelling and storage . 12
Annex A (normative) Requirements for top of rail materials and testing . 13
A.1 Explanation of Annex A: Tables A.1 to A.3 . 13
A.2 Key to Annex A table columns . 13
A.3 Key to Annex A table column ‘Use’ . 13
Annex B (informative) Determination of the volatile constituents in liquid Top of Rail
Materials . 19
B.1 Purpose . 19
B.2 Short description . 19
B.3 Conditions for testing . 19
B.4 Test process. 19
B.5 Recording of test results . 20
Annex C (informative) Functional test on specific equipment . 21
C.1 General . 21
C.2 Sprayability of liquid top of rail materials . 21
Annex D (informative) Twin-disc machine retentivity and coefficient of traction test . 23
D.1 Purpose . 23
D.2 Description . 23
D.3 Conditions for test . 23
Annex E (informative) Twin-disc machine test for determining Creep force vs Creep rate
curve (for solid sticks comparable to Mini Traction Machine (MTM) test) . 27
E.1 Purpose . 27
E.2 Description . 28
E.3 Conditions for test . 28
Annex F (informative) Mini Traction Machine (MTM) creep curve test . 32
F.1 General . 32
F.2 Test equipment . 32
F.3 Application of top of rail material to metal disk . 33
F.4 Performance of the test . 35
F.5 Evaluation of the test . 36
Bibliography . 37

European foreword
This document (CEN/TS 15427-2-2:2023) has been prepared by Technical Committee
CEN/TC 256 “Railway applications”, the secretariat of which is held by DIN.
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 CEN/TS 15427-2-2:2021.
CEN/TS 15427-2-2:2021:
— document has been editorially updated based on the feedback received on the previous
edition;
— corrections and clarifications have been introduced based on the feedback received on the
previous edition;
— consistency with the other parts of the series has been improved.
This document is part of the following series:
— EN 15427-1-1, Railway applications - Wheel/Rail friction management - Part 1-1: Equipment
and Application – Flange lubrication;
— CEN/TS 15427-1-2, Railway applications - Wheel/rail friction management - Part 1-2:
Equipment and application – Top of rail materials;
— CEN/TS 15427-1-3, Railway applications - Wheel/rail friction management - Part 1-3:
Equipment and application – Adhesion materials;
— EN 15427-2-1, Railway applications - Wheel/Rail friction management - Part 2-1: Properties
and Characteristics – Flange lubricants;
— CEN/TS 15427-2-2, Railway applications - Wheel/rail friction management - Part 2-2:
Properties and characteristics – Top of rail materials;
— CEN/TS 15427-2-3, Railway applications - Wheel/Rail friction management - Part 2-3:
Properties and Characteristics – Adhesion materials;
— CEN/prTR 15427-3, Railway applications – Wheel/Rail friction management – Part 3:
Rationale for requirements and further background information.
Any feedback and questions on this document should be directed to the users’ national standards
body. A complete listing of these bodies can be found on the CEN website.
According to the CEN/CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to announce this Technical Specification: 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, Türkiye and the United Kingdom.

Introduction
Friction management using solid or fluid (oil, grease, etc.) substances at the wheel-rail interface
is a complex subject and includes the following aspects:
— lubrication of the wheel flange / rail gauge corner interface, commonly referred to as “flange
or rail lubrication”;
— lubrication of the back of flange/ check rail interface; commonly referred to as “check rail
lubrication”;
— controlling the level of friction at the interface between the top of rail and the wheel tread,
commonly referred to as “top of rail friction management”;
— altering the level of adhesion at the interface between the top of rail and the wheel tread.
This document sets out requirements for the material to be used on the top of rail. It specifies
requirements for the material, how to test it and how to approve it.
The material for top of rail should be tested to confirm there is:
— compatibility with top of rail material applicator equipment;
— no intolerable increased risk of fire;
— no harmful environmental effects;
— no incompatibility between the different materials/lubricants in use, particularly between
solid and fluid systems;
— satisfactory and consistent product quality and performance;
— no degradation to the safety of the railway (braking, signalling, electrical traction return).
The main purpose of a top of rail material is to influence the interface between the wheel and rail
(referred to as the third body layer) to control friction to a level where a reduction in noise or
wear
...