prEN 16452
(Main)Railway applications - Braking - Brake blocks
Railway applications - Braking - Brake blocks
This document specifies the requirements for the design, dimensions, performance, and testing of a brake block that acts on the wheel tread as part of a tread brake system.
NOTE In the scope of Commission Regulation (EU) N° 321/2013 (TSI WAG) the brake block is a friction element for wheel tread brakes.
This document does not cover cast iron brake block requirements.
This document is applicable to brake blocks of various friction level designed to be fitted to tread braked rail vehicles.
This document contains the requirements for interfacing the brake block with the rail vehicle, the testing procedures in order to confirm that it satisfies the basic safety and technical interchangeability requirements, the material control procedures to ensure product quality, reliability and conformity and considers health and environmental needs.
Bahnanwendungen - Bremse - Bremsklötze
Dieses Dokument legt Anforderungen an Auslegung, Abmessungen, Leistung und Prüfung eines Bremsklotzes, der auf die Lauffläche als Teil eines Klotzbremssystems wirkt, fest.
ANMERKUNG Der Bremsklotz ist im Anwendungsbereich der Verordnung der Kommission IEU) Nr.321/2013 (TSIWAG) ein Reibungselement für Radklotzbremsen.
Dieses Dokument behandelt keine Anforderungen an Bremsklötze aus Gusseisen.
Dieses Dokument ist für Bremsklötze verschiedener Reibungsklassen anwendbar, die für den Einbau in Schie
nenfahrzeuge mit Klotzbremse ausgelegt sind.
Dieses Dokument enthält die Anforderungen für die Schnittstelle zwischen Bremsklotz und Schienenfahrzeug, die Prüfverfahren zur Bestätigung, dass die grundlegenden Sicherheitsanforderungen und technischen Anforderungen der Austauschbarkeit erfüllt werden, Kontrollverfahren für Werkstoffe zur Sicherstellung der Produktqualität, Funktionssicherheit und Konformität und berücksichtigt gesundheits- und umweltrelevante Bedürfnisse.
Applications ferroviaires - Freinage - Semelles de frein
Le présent document spécifie les exigences relatives à la conception, aux dimensions, aux performances et aux essais d’une semelle de frein qui agit sur la table de roulement de la roue dans le cadre d’un système de frein sur roue.
NOTE Dans le cadre du Règlement (UE) n° 321/2013 de la Commission (STI WAG), la semelle de frein est un élément de friction pour les freins de bande de roulement.
Le présent document ne couvre pas les exigences relatives aux semelles de frein en fonte.
Le présent document s’applique aux semelles de frein à différents coefficients de frottement conçues pour être montées sur des véhicules ferroviaires à freins sur roue.
Le présent document spécifie les exigences relatives à l’interface de la semelle de frein avec le véhicule ferroviaire, les modes opératoires d’essai pour confirmer la satisfaction des exigences de base en matière de sécurité et d’interchangeabilité technique, les modes opératoires de contrôle des matériaux pour s’assurer de la qualité, de la fiabilité et de la conformité des produits, et tient compte des besoins en matière de santé et d'environnement.
Železniške naprave - Zavore - Zavorne ploščice
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2025
Železniške naprave - Zavore - Zavorne ploščice
Railway applications - Braking - Brake blocks
Bahnanwendungen - Bremse - Bremsklötze
Applications ferroviaires - Freinage - Semelles de frein
Ta slovenski standard je istoveten z: prEN 16452
ICS:
45.040 Materiali in deli za železniško Materials and components
tehniko for railway engineering
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2025
ICS Will supersede EN 16452:2015+A1:2019
English Version
Railway applications - Braking - Brake blocks
Applications ferroviaires - Freinage - Semelles de frein Bahnanwendungen - Bremse - Bremsklötze
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 256.
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
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, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 16452:2025 E
worldwide for CEN national Members.
Contents Page
European foreword . 6
5.1 Deviations from requirements . 11
5.2 Functions . 11
5.3 Operational criteria . 11
6.1 General . 13
6.2 Characterisation of brake blocks for locomotives and passenger vehicles (declaration
of conformity) . 13
6.3 Characterisation of brake blocks for freight wagons (declaration of conformity) . 14
6.4 Dynamometer specification . 16
7.1 Brake block characteristics . 17
7.2 Frictional requirements for brake blocks . 17
7.3 Static coefficient of friction . 34
7.4 Extreme winter conditions (freight wagons). . 34
7.5 Locked brake (fusibility) . 35
7.6 Vehicle brake test . 36
7.7 In-service assessment . 37
7.8 Metal pick up . 37
7.9 Influence on track circuit operation (shuntage) . 38
8.1 General . 38
8.2 Noise . 38
8.3 Odour . 38
8.4 Smoke, fumes and sparkling . 39
8.5 Recycling and disposal . 39
Annex A (normative) Summary of dynamometer test programs and acceptance criteria . 40
Annex B (normative) General requirements for conducting dynamometer test programs . 42
B.1 General . 42
B.2 Rotation and ventilation conditions . 42
B.3 Brake application timing t . 42
s
B.4 Bedding-in . 42
B.5 Wear. 43
B.6 Roughness index of the wheel tread . 43
B.7 Interruption of the tests . 43
B.8 Temperatures . 43
B.9 Wet conditions . 44
B.10 Test of simulation of continuous braking . 45
B.11 Test wheels . 45
B.12 Documentation of brake tests . 47
B.13 Other conditions . 49
Annex C (normative) Composite brake blocks (K) (2 x Bg – 2 x Bgu – 1 x Bgu) –
demonstration of friction properties for S and SS (S/SS) -braked freight wagons
(v = 120 km/h) . 50
max
C.1 Test program – performance tests . 50
C.2 Test program for additional performance test . 54
C.3 Deviant conditions at the end of brake applications of performance test . 55
C.4 Test program – simulation braking performance assessment S-brakes (only
recommended) . 55
C.5 Test Program – simulation braking performance assessment SS-brakes (only
recommended) . 57
C.6 Deviant conditions for the bedding-in of program C.4 and C.5 . 58
C.7 Dispersion range of mean coefficient of frictions . 58
Annex D (normative) Composite brake blocks (LL) (2 x Bg – 2 x Bgu) – Demonstration of
friction properties for S and SS (S/SS) -braked freight wagons (v = 120 km/h) . 63
max
D.1 Test program – performance tests . 63
D.2 Test program for additional performance test . 66
D.3 Deviant conditions at the end of brake applications of performance test . 68
D.4 Test program – simulation of braking performance assessment S-brakes (only
recommended) . 68
D.5 Program – simulation of braking performance assessment SS-brakes (only
recommended) . 69
D.6 Deviant conditions for performance of program D.4 and D.5 . 70
D.7 Dispersion range of mean coefficient of frictions . 70
D.8 LL blocks (interchangeable) . 73
Annex E (normative) Composite brake blocks (K) (1 x Bg) – demonstration of friction
properties for S and SS (S/SS) -braked freight wagons (v = 120 km/h) . 77
max
E.1 Test program - performance test . 77
E.2 Deviant conditions for the performance of program E 1 . 81
E.3 Dispersion range of mean coefficient of frictions . 81
Annex F (normative) Generic program for composite brake blocks – demonstration of
friction properties . 83
Annex G (normative) Generic program for composite brake blocks for freight application –
demonstration of friction properties . 90
G.1 General . 90
G.2 Generic program – performance test for freight application . 90
G.3 Definitions . 93
G.4 Values to be determined in order to define the area of use . 93
Annex H (normative) Composite brake blocks – dynamometer test program to detect the
formation of metal pick-up at the brake block . 96
H.1 Test program for freight wagons with brake blocks type K and LL . 96
H.2 Deviant conditions for the performance of test Program H.1 . 98
H.3 Generic test program for vehicles tested according to Annex F . 98
Annex I (normative) Test run to demonstrate the extreme winter braking properties brake
blocks K – LL for freight wagons . 102
I.1 Test program to demonstrate the braking properties under severe snowy conditions . 102
I.2 Values to be determined in order to define the area of use . 105
I.3 Assessment of measurement data and pass/fail criteria . 105
Annex J (normative) Composite brake blocks – test program to simulate “locked brake” . 107
J.1 Test program for freight wagons with brake blocks type K and LL and coaches with
brake blocks type K .
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.