EN 16452:2015

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Bahnwendungen - 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 16452:2015SIST EN 16452:2015en,fr,de01-september-2015SIST EN 16452:2015SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16452
July 2015 ICS 45.040; 45.060.01 English Version
Railway applications - Braking - Brake blocks
Applications ferroviaires - Freinage - Semelles de frein
Bahnanwendungen - Bremse - Bremsklotzsohlen This European Standard was approved by CEN on 28 February 2015.
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
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Summary of Dynamometer test programs and acceptance criteria . 28 Annex B (normative)
General requirements for conducting dynamometer test programmes . 30 B.1 General . 30 B.2 Rotation and ventilation conditions . 30 B.3 Brake application timing ts . 30 B.4 Bedding . 30 B.5 Wear . 30 B.6 Roughness index of the wheel tread . 31 B.7 Interruption of the tests . 31 B.8 Temperatures . 31 B.9 Wet conditions . 31 B.10 Test of simulation of downhill . 32 B.11 Test wheels . 32 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) . 33 C.1 Program for performance tests . 33 C.2 Program for simulation brake assessment . 38 C.3 Dispersion range of mean friction coefficients . 39 C.4 Dispersion range of instantaneous friction coefficients . 42 Annex D (normative)
Composite brake blocks (LL) – Demonstration of friction properties for S and SS (S/SS) – braked freight wagons (vmax = 120 km/h) . 44 D.1 Program for performance tests . 44 D.2 Program for simulation brake assessment . 48 D.3 Dispersion range of mean friction coefficients . 50 D.4 Dispersion range of instantaneous friction coefficients . 52 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) . 53 E.1 Program for performance tests . 53 E.2 Dispersion range of mean friction coefficients . 56 SIST EN 16452:2015

Composite brake blocks (L) – Demonstration of friction properties for extra tread brake of coach . 59 F.1 Program for performance tests . 59 F.2 Program for simulation brake assessment . 62 F.3 Dispersion range of mean friction coefficients in dry condition . 63 F.4 Dispersion range of mean friction coefficients in wet condition . 64 F.5 Dispersion range of instantaneous friction coefficients . 65 Annex G (normative)
Composite brake blocks (K) – Demonstration of friction properties for locomotives . 67 G.1 Program for performance tests . 67 G.2 Program for simulation brake assessment . 70 G.3 Dispersion range of mean friction coefficients in dry condition . 71 G.4 Dispersion range of mean friction coefficients in wet condition . 72 G.5 Dispersion range of instantaneous friction coefficients . 73 Annex H (normative)
Composite brake blocks (K) – Demonstration of friction properties for EMU – DMU . 75 H.1 Program for performance tests . 75 H.2 Program for simulation brake assessment . 80 H.3 Dispersion range of mean friction coefficients in dry condition . 81 H.4 Dispersion range of mean friction coefficients in wet condition . 82 H.5 Dispersion range of instantaneous friction coefficients . 83 Annex I (normative)
Composite brake blocks (K) – Demonstration of friction properties for High speed train (motor bogie) . 85 I.1 Program for performance tests . 85 I.2 Program for simulation brake assessment . 88 I.3 Dispersion range of mean friction coefficients in dry condition . 89 I.4 Dispersion range of mean friction coefficients in wet condition . 91 I.5 Dispersion range of instantaneous friction coefficients . 92 Annex J (informative)
Dynamometer test program – Generic test program . 94 J.1 General . 94 J.2 Generic test program . 94 J.3 Definitions . 97 J.4 Principle of assessment and pass/fail criteria . 98 Annex K (normative)
Dynamometer Test program to detect the formation of metal pick-up at the brake block . 99 K.1 Test program for freight wagons with brake blocks type K and LL . 99 K.2 Test program for locomotives with brake blocks type K . 101 K.3 Test program for EMU – DMU with brake blocks type K . 103 K.4 Test program for High speed train with brake blocks type K . 106 SIST EN 16452:2015

Dynamometer test program to demonstrate the extreme winter braking properties . 109 L.1 Test program for freight wagons with brake blocks type K . 109 L.2 Test program for freight wagons with brake blocks type LL . 111 L.3 Specific requirements for conducting Test Programs L.1 and L.2 . 112 L.4 Process of assessment and past fail criteria for test programs L.1 and L.2 . 113 L.5 Generic flow chart to perform test program . 114 L.6 Detailed flow chart to perform test program (example brake block K) . 115 Annex M (normative)
Test run to demonstrate the extreme winter braking properties brake blocks K – LL for freight wagons . 118 M.1 General . 118 M.2 Test conditions . 118 M.3 Bases for assessment . 119 M.4 Assessment of measurement data and pass/fail criteria . 121 Annex N (normative)
Dynamometer Test program to simulate “Locked brake” . 123 N.1 Test program for freight wagons with brake blocks type K and LL . 123 N.2 Test program for locomotives with brake blocks type K . 124 N.3 Test program for EMU – DMU with brake blocks type K . 125 N.4 Test program for High speed train with brake blocks type K . 126 Annex O (normative)
Dynamometer test program to demonstrate the compatibility with track circuits . 127 O.1 General . 127 O.2 Short description of the measuring method used . 127 O.3 Schematic diagram of test set up . 127 O.4 Flow chart to perform test program . 129 O.5 Preparation of the disc and the rollers . 129 O.6 Preparation of the samples of brake block . 129 O.7 Contamination of disc . 130 O.8 Measurements . 131 O.9 Assessment of the results . 132 Annex P (informative)
Vehicle test to demonstrate the compatibility with track circuits . 134 P.1 General . 134 P.2 Test conditions . 134 P.3 Assessment of results . 135 P.4 Pass/fail criteria . 136 Annex Q (informative)
Dynamometer test program – Determination of static friction coefficient . 138 Q.1 Test program for freight wagons with brake blocks type K and LL . 138 Q.2 Test program for EMU – DMU and Locomotive with brake blocks type K . 139 Q.3 Test program for High speed train with brake blocks type K . 140 SIST EN 16452:2015

Dynamometer test program – Simulation of service conditions for freight wagons . 143 R.1 Simulation freight wagon with brake block type K 2Bgu . 143 R.2 Simulation freight wagon with brake block type LL 2Bgu . 145 Annex S (normative)
Interchangeability, rejection lugs and critical dimensions . 148 Annex T (normative)
Brake block shear and flexural strength tests . 151 T.1 General . 151 T.2 Shear strength test . 151 T.3 Flexural strength test . 152 Annex U (normative)
Limitation of permissible mechanical damage of brake block . 154 U.1 General . 154 U.2 Cracked through to back-plate . 154 U.3 Crumbling of the friction material . 155 U.4 Metal pick-up . 155 U.5 Detachment from back-plate . 156 U.6 Cracks in the direction of wheel circumference . 156 U.7 Detachment of the friction material . 156 U.8 Interface with the brake block holder . 156 Annex V (normative)
In service assessment of brake block . 158 V.1 General . 158 V.2 Freight wagon . 158 V.3 Coach . 159 V.4 Locomotive . 159 V.5 EMU-DMU . 160 V.6 High speed train . 160 V.7 Description of areas to be monitored and additional measures . 161 V.8 Pass/fail criteria . 162 Annex W (informative)
Complementary definitions and abbreviations . 163 Annex X (informative)
Brake block characterization test . 165 Annex ZA (informative)
Relationship between this European Standard and the Essential Requirements of EU Directive 2008/57/EC . 166 Bibliography . 169
3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 14478 and the following apply. 3.1 application parameter configuration parameters refer to vehicle mass, operating speed, wheel diameter, braked mass, brake block configuration, brake block force 3.2 Bg configuration one brake block 320 mm per brake block holder Note 1 to entry: Bg comes from UIC and means “Bremsklotzsohle geteilt”. 3.3 Bgu configuration two brake blocks 250 mm per brake block holder Note 1 to entry: Bgu comes from UIC and means “Bremse geteilt mit unterteilter Sohle”. 3.4 brake block stator part of a tread brake adapted to generate a friction force when engaged with a wheel tread 3.5 brake block force force with which the brake block is made to come into contact with the wheel tread 3.6 friction material consumable portion of the brake block that acts on the wheel tread in order to provide the specified brake performance 3.7 coefficient of friction 3.7.1 mean coefficient of friction coefficient of friction of the friction material, integrated over distance, for any one condition of braking SIST EN 16452:2015
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