Podaci o nacrtu
- Railway applications - Braking - Brake blocks
- 1 Scope
- 2 Normative references
- + 3 Terms and definitions
- + 4 Symbols and abbreviated terms
- Table 1 — Symbols and abbreviated terms
- + 5 Overall requirements
- + 6 Acceptance procedure – brake block performanc...
- + 7 Requirements
- + 8 Environmental issues
- 9 Marking
- + Annex A (normative) Summary of dynamometer tes...
- Table A.1 — Friction performance test programs
- Table A.2 — Other test programs
- + Annex B (normative) General requirements for c...
- B.1 General
- B.2 Rotation and ventilation conditions
- Table B.1 — Speed and ventilation conditions
- B.3 Brake application timing ts
- B.4 Bedding-in
- B.5 Wear
- B.6 Roughness index of the wheel tread
- B.7 Interruption of the tests
- B.8 Temperatures
- B.9 Wet conditions
- Figure B.1 — Dynamometer wet test configuration...
- B.10 Test of simulation of continuous braking
- B.11 Test wheels
- Figure B.2 — Dimensions of wheel
- B.12 Documentation of brake tests
- Table B.1 — Table of test results
- B.13 Other conditions
- + Annex C (normative) Composite brake blocks (K)...
- C.1 Test program – performance tests
- Table C.1 — Program for performance tests
- C.2 Test program for additional performance tes...
- Table C.2— Additional program for performance t...
- C.3 Deviant conditions at the end of brake appl...
- C.4 Test program – simulation braking performan...
- Table C.3— Program for simulation brake assessm...
- C.5 Test Program – simulation braking performan...
- Table C.4 — Program for simulation brake assess...
- C.6 Deviant conditions for the bedding-in of pr...
- + C.7 Dispersion range of mean coefficient of fri...
- + Annex D (normative) Composite brake blocks (LL...
- D.1 Test program – performance tests
- Table D.1 — Program for performance tests
- D.2 Test program for additional performance tes...
- Table D.2 — Additional program for performance ...
- D.3 Deviant conditions at the end of brake appl...
- D.4 Test program – simulation of braking perfor...
- Table D.3 — Program for simulation brake assess...
- D.5 Program – simulation of braking performance...
- Table D.4 — Program for simulation brake assess...
- D.6 Deviant conditions for performance of progr...
- + D.7 Dispersion range of mean coefficient of fri...
- D.8 LL blocks (interchangeable)
- Figure D.3 — Exemplary comparison of k-values
- Figure D.4 — Exemplary deviation of k-values fo...
- Table D.7 — Criteria for interchangeability of ...
- + Annex E (normative) Composite brake blocks (K)...
- E.1 Test program - performance test
- Table E.1 — Program for performance tests
- E.2 Deviant conditions for the performance of p...
- + E.3 Dispersion range of mean coefficient of fri...
- + Annex F (normative) Generic program for compos...
- Table F.1 — Generic program for performance tes...
- + Annex G (normative) Generic program for compos...
- G.1 General
- G.2 Generic program – performance test for frei...
- Table G.1 — Program for performance tests[126]
- G.3 Definitions
- G.4 Values to be determined in order to define ...
- Figure G.1 — Template diagrams and allocated br...
- + Annex H (normative) Composite brake blocks – d...
- H.1 Test program for freight wagons with brake ...
- Table H.1 — Test program for brake blocks type ...
- H.2 Deviant conditions for the performance of t...
- H.3 Generic test program for vehicles tested ac...
- Table H.2 — Generic program to detect the forma...
- Table H.3— Seq E – initial speeds
- + Annex I (normative) Test run to demonstrate th...
- I.1 Test program to demonstrate the braking pro...
- Figure I.1 — Reference test (snow level 0)
- Figure I.2 — Winter test (snow level 2 to 3)
- Figure I.3 — Winter test (snow level 4 to 5)
- I.2 Values to be determined in order to define ...
- I.3 Assessment of measurement data and pass/fai...
- + Annex J (normative) Composite brake blocks – t...
- J.1 Test program for freight wagons with brake ...
- Table J.1 — Test program for brake blocks type ...
- J.2 Generic program for applications not covere...
- Table J.2 — Generic test program for applicatio...
- + Annex K (normative) Composite brake blocks – d...
- K.1 General
- K.2 Short description of the measuring method u...
- K.3 Schematic diagram of test set up
- Figure K.1 — Schematic diagram of the test set ...
- K.4 Flow chart to perform test program
- Figure K.2 — Flow chart to perform test program...
- + K.5 Preparation of the disc and the rollers
- + K.6 Preparation of the samples of brake block
- K.7 Contamination of disc
- K.8 Measurements
- Figure K.4 — Electrical cycle
- K.9 Assessment of the results
- Figure K.5 — Limit value for cleaned disc
- Figure K.6 — Limit value for contaminated disc
- Annex L (informative) Composite brake blocks –...
- + Annex M (normative) Interchangeability, reject...
- Figure M.1 — Brake block design for brake block...
- Figure M.2 — Design examples for contour of fri...
- Figure M.3 — Design space for non-interchangeab...
- Figure M.4 — Design example for wear limit mark...
- Figure M.5 — Position example for markings
- + Annex N (normative) Brake block shear and flex...
- N.1 General
- + N.2 Shear strength test
- + N.3 Flexural strength test
- + Annex O (normative) Limitation of permissible ...
- O.1 General for in-service test
- O.2 Cracked through to back-plate
- Figure O.1 — Cracked through to back-plate
- O.3 Crumbling of the friction material
- Figure O.2 — Crumbling of the friction material...
- O.4 Metal pick-up
- Figure O.3 — Metal pick-up
- O.5 Detachment from back-plate
- Figure O.4 — Detachment from back-plate
- O.6 Cracks in the direction of wheel circumfere...
- Figure O.5 — Cracks in the direction of wheel c...
- O.7 Detachment of the friction material
- Figure O.6 — Detachment of the friction materia...
- O.8 Interface with the brake block holder
- + Annex P (normative) In-service assessment of b...
- P.1 General
- + P.2 Freight wagon
- + P.3 Coach
- + P.4 Locomotive
- + P.5 EMU-DMU
- + P.6 High-speed train
- P.7 Description of areas to be monitored and ad...
- Table P.6 — Description of areas to be monitore...
- P.8 Pass/fail criteria
- + Annex Q (informative) Complementary symbols an...
- Table Q.1 — Complementary symbols and definitio...
- Figure Q.1 — Schematic definition of complement...
- + Annex R (normative) Mechanical, physical and c...
- Table R.1 — Reference tests for quality assuran...
- + Annex S (informative) Declaration of conformit...
- Figure S.1 — Characteristic friction values of ...
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.