Railway applications - Braking - Brake blocks

This European Standard gives the requirements for the design, dimensions, performance, and testing of a brake block (otherwise known as brake shoe insert) that acts on the wheel tread as part of a tread brake system. This European Standard does not cover cast iron brake block requirements.
This European Standard is applicable to brake blocks of either "K", "L", or "LL" friction level designed to be fitted to tread braked rail vehicles.
This European Standard 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

Diese Europäische Norm enthält Anforderungen an Auslegung, Abmessungen, Leistung und Prüfung eines Bremsklotzes (auch bekannt als „Bremsklotzsohle“), die auf die Lauffläche als Teil eines Klotzbremssystems wirkt. Diese Norm behandelt keine Anforderungen an Bremsklötze aus Gusseisen.
Diese Europäische Norm ist für Bremsklötze der Reibungsklassen „K“, „L“, oder „LL“ anwendbar, die für den Einbau in Schienenfahrzeuge mit Klotzbremse ausgelegt sind.
Diese Norm enthält die Anforderungen für die Schnittstelle zwischen Bremsklotz und Schienenfahrzeug, die Prüfverfahren zur Bestätigung, dass die grundlegenden Sicherheitsanforderungen und technischen Anfor¬derungen der Austauschbarkeit erfüllt werden, Kontrollverfahren für Werkstoffe zur Sicherstellung der Pro¬duktqualität, Funktionssicherheit und Konformität und berücksichtigt gesundheits- und umweltrelevante Bedürfnisse.

Applications ferroviaires - Freinage - Semelles de frein

La présente Norme européenne spécifie les exigences relatives à la conception, aux dimensions, aux performances et aux essais d’une semelle de frein (également appelée « semelle de freinage ») qui agit sur la table de roulement de la roue dans le cadre d’un système de frein sur roue. La présente Norme européenne ne traite pas des exigences relatives aux semelles de frein en fonte.
La présente Norme européenne s’applique aux semelles de frein à coefficient de frottement de niveau « K », « L » ou « LL » conçues pour être montées sur des véhicules ferroviaires à freins sur roue.
La présente Norme européenne 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

Ta evropski standard podaja zahteve za zasnovo, mere, zmogljivost in preskušanje zavornih ploščic (imenovanih tudi vložek zavorne čeljusti), ki deluje na tekalni profil kot del zavornega sistema s tekalnim profilom. Ta evropski standard ne zajema zahtev za zavorne ploščice iz litega železa.
Ta evropski standard se uporablja za zavorne ploščice s stopnjo trenja »K«, »L« ali »LL«, ki so zasnovane za namestitev na železniška vozila z zavornim sistemom s tekalnim profilom.
Ta evropski standard vsebuje zahteve za stik zavorne ploščice z železniškim vozilom, preskusne postopke za potrditev izpolnjevanja osnovnih zahtev glede varnosti in tehnične zamenljivosti, postopke nadzora materiala za zagotavljanje kakovosti, zanesljivosti in skladnosti izdelkov ter upošteva zdravstvene in okoljske zahteve.

General Information

Status
Published
Publication Date
05-Mar-2019
Current Stage
9093 - Decision to confirm - Review Enquiry
Due Date
04-Mar-2021
Completion Date
05-Mar-2021

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Bahnanwendungen - Bremse - BremsklotzsohlenApplications ferroviaires - Freinage - Semelles de freinRailway applications - Braking - Brake blocks45.040Materiali in deli za železniško tehnikoMaterials and components for railway engineeringICS:Ta slovenski standard je istoveten z:EN 16452:2015+A1:2019SIST EN 16452:2015+A1:2019en,fr,de01-maj-2019SIST EN 16452:2015+A1:2019SLOVENSKI

STANDARD
SIST EN 16452:2015+A1:2019
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16452:2015+A1
March
t r s { ICS
v wä r v râ
v wä r x rä r s Supersedes EN
s x v w tã t r s wEnglish Version

Railway applications æ Braking æ Brake blocks Applications ferroviaires æ Freinage æ Semelles de frein Bahnanwendungen æ Bremse æ Bremsklotzsohlen This European Standard was approved by CEN on

t z February
t r s w and includes Amendment
s approved by CEN on
t s December
t r s zä

egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä

translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä

CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä

EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre:
Rue de la Science 23,
B-1040 Brussels

t r s { CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN

s x v w tã t r s w ªA sã t r s { ESIST EN 16452:2015+A1:2019

EN 16452:2015+A1:2019 (E) 2 Contents Page Foreword .......................................................................................................................................................................... 8 Introduction .................................................................................................................................................................... 9 1 Scope ................................................................................................................................................................. 10 2 Normative references ................................................................................................................................. 10 3 Terms and definitions ................................................................................................................................ 11 4 Abbreviations ................................................................................................................................................ 13 5 Overall requirements ................................................................................................................................. 13 5.1 Deviations from requirements ................................................................................................................ 13 5.2 Functions ......................................................................................................................................................... 13 5.3 Operational criteria..................................................................................................................................... 14 5.3.1 Friction material performance ............................................................................................................... 14 5.3.2 Service performance ................................................................................................................................... 14 5.3.3 Brake block characteristics ...................................................................................................................... 15 6 Acceptance procedure ................................................................................................................................ 15 6.1 Brake block performance requirements ............................................................................................. 15 6.1.1 General ............................................................................................................................................................. 15 6.1.2 Category A ....................................................................................................................................................... 16 6.1.3 Category B ....................................................................................................................................................... 16 6.1.4 Category C ....................................................................................................................................................... 16 6.2 Approval test requirements ..................................................................................................................... 16 6.3 Dynamometer specification ..................................................................................................................... 19 7 Category A requirements .......................................................................................................................... 19 7.1 Brake block characteristics ...................................................................................................................... 19 7.1.1 Standard design ............................................................................................................................................ 19 7.1.2 Brake block characterization test .......................................................................................................... 19 7.1.3 Brake block mechanical characteristics for service operation ................................................... 20 7.2 Dynamic friction performance ................................................................................................................ 20 7.2.1 Generic requirements for assessment process ................................................................................. 20 7.2.2 Bedded and non bedded performance ................................................................................................. 21 7.2.3 Variation in mean coefficient of friction in dry condition for a brake to rest ........................ 21 7.2.4 Mean friction coefficient variation under wet conditions ............................................................. 21 7.2.5 Mean friction coefficient variation at high initial temperature .................................................. 21 7.2.6 Mean friction coefficient variation after simulation of a downhill brake application ........ 21 7.2.7 Instantaneous friction coefficient variation during simulation of a downhill brake application ...................................................................................................................................................... 21 7.2.8 Variation in instantaneous friction for a brake to rest .................................................................. 23 7.3 Static friction coefficient ............................................................................................................................ 24 7.4 Extreme winter conditions (freight wagons) ..................................................................................... 24 7.4.1 General ............................................................................................................................................................. 24 7.4.2 !Dynamometer test ................................................................................................................................. 24 7.4.3 Train brake test ............................................................................................................................................ 25 7.5 Locked brake (fusibility) ........................................................................................................................... 26 7.5.1 Generic prescriptions ................................................................................................................................. 26 7.5.2 Specific prescriptions for freight wagons............................................................................................ 26 SIST EN 16452:2015+A1:2019

EN 16452:2015+A1:2019 (E) 3 8 Category B requirements ........................................................................................................................... 27 8.1 Vehicle brake test ......................................................................................................................................... 27 8.2 Dynamometer wear test (friction couple) ........................................................................................... 27 8.3 Dynamic friction performance................................................................................................................. 27 8.4 In service assessment .................................................................................................................................. 27 9 Category C requirements ........................................................................................................................... 28 9.1 Metal pick up .................................................................................................................................................. 28 9.2 Influence on track circuit operation (shuntage) ............................................................................... 28 10 Environmental issues .................................................................................................................................. 28 10.1 General ............................................................................................................................................................. 28 10.2 Noise .................................................................................................................................................................. 28 10.3 Odour ................................................................................................................................................................ 29 10.4 Smoke, fumes and sparkling ..................................................................................................................... 29 10.5 Recycling and disposal ................................................................................................................................ 29 11 Marking ............................................................................................................................................................ 29 Annex A (normative)

Summary of Dynamometer test programs and acceptance criteria ............. 30 Annex B (normative)

General requirements for conducting dynamometer test programmes .... 32 B.1 General ............................................................................................................................................................. 32 B.2 Rotation and ventilation conditions ...................................................................................................... 32 B.3 Brake application timing ts ....................................................................................................................... 32 B.4 Bedding ............................................................................................................................................................ 32 B.5 Wear .................................................................................................................................................................. 32 B.6 Roughness index of the wheel tread ...................................................................................................... 33 B.7 Interruption of the tests ............................................................................................................................. 33 B.8 Temperatures ................................................................................................................................................ 33 B.9 Wet conditions ............................................................................................................................................... 33 B.10 Test of simulation of downhill ................................................................................................................. 34 B.11 Test wheels ..................................................................................................................................................... 34 Annex C (normative)

Composite brake blocks (K) (2Bg – 2Bgu)– Demonstration of friction properties for S and SS (S/SS) – braked freight wagons (vmax = 120 km/h) ......................... 35 C.1 Program for performance tests ............................................................................................................... 35 C.2 Program for simulation brake assessment ......................................................................................... 41 C.3 Dispersion range of mean friction coefficients .................................................................................. 42 C.4 Dispersion range of instantaneous friction coefficients ................................................................ 46 Annex D (normative)

Composite brake blocks (LL) – Demonstration of friction properties for S and SS (S/SS) – braked freight wagons (vmax = 120 km/h) ................................................ 47 D.1 Program for performance tests ............................................................................................................... 47 D.2 Program for simulation brake assessment ......................................................................................... 52 D.3 Dispersion range of mean friction coefficients .................................................................................. 54 D.4 Dispersion range of instantaneous friction coefficients ................................................................ 56 SIST EN 16452:2015+A1:2019

EN 16452:2015+A1:2019 (E) 4 Annex E (normative)

Composite brake blocks (K) (1Bg)– Demonstration of friction properties for S and SS (S/SS) – braked freight wagons (vmax = 120 km/h) ......................... 57 E.1 Program for performance tests............................................................................................................... 57 E.2 Dispersion range of mean friction coefficients ................................................................................. 60 E.3 Dispersion range of instantaneous friction coefficients ................................................................ 62 Annex F (normative)

Composite brake blocks (L) – Demonstration of friction properties for extra tread brake of coach ........................................................................................................................ 63 F.1 Program for performance tests............................................................................................................... 63 F.2 Program for simulation brake assessment ......................................................................................... 67 F.3 Dispersion range of mean friction coefficients in dry condition ................................................ 68 F.4 Dispersion range of mean friction coefficients in wet condition ................................................ 69 F.5 Dispersion range of instantaneous friction coefficients ................................................................ 70 Annex G (normative)

Composite brake blocks (K) – Demonstration of friction properties for locomotives ............................................................................................................................................. 72 G.1 Program for performance tests............................................................................................................... 72 G.2 Program for simulation brake assessment ......................................................................................... 76 G.3 Dispersion range of mean friction coefficients in dry condition ................................................ 77 G.4 Dispersion range of mean friction coefficients in wet condition ................................................ 78 G.5 Dispersion range of instantaneous friction coefficients ................................................................ 79 Annex H (normative)

Composite brake blocks (K) – Demonstration of friction properties for EMU – DMU ............................................................................................................................................... 81 H.1 Program for performance tests............................................................................................................... 81 H.2 Program for simulation brake assessment ......................................................................................... 86 H.3 Dispersion range of mean friction coefficients in dry condition ................................................ 87 H.4 Dispersion range of mean friction coefficients in wet condition ................................................ 88 H.5 Dispersion range of instantaneous friction coefficients ................................................................ 89 Annex I (normative)

Composite brake blocks (K) – Demonstration of friction properties for High speed train (motor bogie)............................................................................................................... 91 I.1 Program for performance tests............................................................................................................... 91 I.2 Program for simulation brake assessment ......................................................................................... 94 I.3 Dispersion range of mean friction coefficients in dry condition ................................................ 95 I.4 Dispersion range of mean friction coefficients in wet condition ................................................ 97 I.5 Dispersion range of instantaneous friction coefficients ................................................................ 98 Annex J (!normative")

Dynamometer test program – Generic test program ........................... 100 J.1 General ........................................................................................................................................................... 100 J.2 Generic test program ................................................................................................................................ 100 J.3 Definitions .................................................................................................................................................... 104 J.4 !Values to be determined in order to define the area of use ................................................. 104 SIST EN 16452:2015+A1:2019

EN 16452:2015+A1:2019 (E) 5 J.5 "Principle of assessment and pass/fail criteria ......................................................................... 106 Annex K (normative)

Dynamometer Test program to detect the formation of metal pick-up at the brake block ...................................................................................................................................... 107 K.1 Test program for freight wagons with brake blocks type K and LL ........................................ 107 K.2 Test program for locomotives with brake blocks type K ............................................................ 109 K.3 Test program for EMU – DMU with brake blocks type K.............................................................. 112 K.4 Test program for High speed train with brake blocks type K ................................................... 115 Annex L (normative)

Dynamometer test program to demonstrate the extreme winter braking properties .................................................................................................................................... 118 L.1 Test program for freight wagons with brake blocks type K ....................................................... 118 L.2 Test program for freight wagons with brake blocks type LL ..................................................... 120 L.3 Specific requirements for conducting Test Programs L.1 and L.2 ........................................... 121 L.4 Process of assessment and past fail criteria for test programs L.1 and L.2 .......................... 122 L.5 Generic flow chart to perform test program .................................................................................... 123 L.6 Detailed flow chart to perform test program (example brake block K) ................................ 124 Annex M (normative)

Test run to demonstrate the extreme winter braking properties brake blocks K – LL for freight wagons .............................................................................................. 127 M.1 !Test program to demonstrate the braking properties under severe snowy conditions ..................................................................................................................................................... 127 M.2 Values to be determined in order to define the area of use ....................................................... 130 M.3 Assessment of measurement data and pass/fail criteria ............................................................ 130 Annex N (normative)

Dynamometer Test program to simulate “Locked brake” ............................ 132 N.1 Test program for freight wagons with brake blocks type K and LL ........................................ 132 N.2 Test program for locomotives with brake blocks type K ............................................................ 133 N.3 Test program for EMU – DMU with brake blocks type K.............................................................. 134 N.4 Test program for High speed train with brake blocks type K ................................................... 135 Annex O (normative)

Dynamometer test program to demonstrate the compatibility with track circuits ................................................................................................................................................ 136 O.1 General .......................................................................................................................................................... 136 O.2 Short description of the measuring method used.......................................................................... 136 O.3 Schematic diagram of test set up.......................................................................................................... 136 O.4 Flow chart to perform test program ................................................................................................... 138 O.5 Preparation of the disc and the rollers .............................................................................................. 138 O.6 Preparation of the samples of brake block ...................................................................................... 139 O.7 Contamination of disc .............................................................................................................................. 139 O.8 Measurements ............................................................................................................................................ 140 O.9 Assessment of the results ....................................................................................................................... 141 Annex P (informative)

Vehicle test to demonstrate the compatibility with track circuits .......... 143 SIST EN 16452:2015+A1:2019

EN 16452:2015+A1:2019 (E) 6 P.1 General ........................................................................................................................................................... 143 P.2 Test conditions ............................................................................................................................................ 143 P.3 Assessment of results ............................................................................................................................... 144 P.4 Pass/fail criteria ......................................................................................................................................... 145 Annex Q (informative)

Dynamometer test program – Determination of static friction coefficient ...................................................................................................................................................... 147 Q.1 !Generic test program for freight wagons with brake blocks type K and LL ................... 147 Q.2 !Specific test program for S and/or SS freight wagons with brake blocks type K and LL" ....................................................................................................................................................... 147 Q.3 Test program for EMU – DMU and Locomotive with brake blocks type K ............................. 149 Q.4 Test program for High speed train with brake blocks type K .................................................... 150 Q.5 !Specific Requirements for conducting dynamometer test programmes Q.1 to Q.4" .............................................................................................................................................................. 150 Annex R (informative)

Dynamometer test program – Simulation of service conditions for freight wagons ............................................................................................................................................. 153 R.1 Simulation freight wagon with brake block type K 2Bgu ............................................................ 153 R.2 Simulation freight wagon with brake block type LL 2Bgu .......................................................... 155 Annex S (normative)

Interchangeability, rejection lugs and critical dimensions ........................... 158 Annex T (normative)

Brake block shear and flexural strength tests ................................................... 161 T.1 General ........................................................................................................................................................... 161 T.2 Shear strength test ..................................................................................................................................... 161 T.3 Flexural strength test ............................................................................................................................... 162 Annex U (normative)

Limitation of permissible mechanical damage of brake block .................... 164 U.1 General ........................................................................................................................................................... 164 U.2 Cracked through to back-plate .............................................................................................................. 164 U.3 Crumbling of the friction material ....................................................................................................... 165 U.4 Metal pick-up ............................................................................................................................................... 165 U.5 Detachment from back-plate ................................................................................................................. 166 U.6 Cracks in the direction of wheel circumference ............................................................................. 166 U.7 Detachment of the friction material .................................................................................................... 166 U.8 Interface with the brake block holder ................................................................................................ 167 Annex V (normative)

In service assessment of brake block .................................................................... 168 V.1 General ........................................................................................................................................................... 168 V.2 Freight wagon .............................................................................................................................................. 168 V.3 Coach ............................................................................................................................................................... 169 V.4 Locomotive ................................................................................................................................................... 169 V.5 EMU-DMU ...................................................................................................................................................... 170 V.6 High speed train ....................................................

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