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BS EN 15551:2022

BS EN 15551:2022

$215.11

Railway applications. Railway rolling stock. Buffers

Published By Publication Date Number of Pages
BSI 2022 82
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This document defines the requirements for buffers with 105 mm, 110 mm and 150 mm stroke for vehicles or units which use buffers and screw coupling. It covers the functionality, interfaces and testing procedures, including pass fail criteria, for buffers. NOTE 1 Typically, buffers with a stroke of 105 mm are used on freight wagons and locomotives, buffers with a stroke of 110 mm are used on coaches and locomotives and buffers with a stroke of 150 mm are used on freight wagons. It defines the different categories of buffers, the space envelope, static and dynamic characteristics and energy absorption. It defines the static and dynamic characteristics of the elastic systems. It also defines the requirements for buffers with integrated crash elements (crashworthy buffers) for tank wagons for dangerous goods. The requirements of this document also apply to buffers of locomotives and passenger coaches which are bound to meet the crashworthiness requirements of EN 15227 for normal service only. The properties for the energy absorbing function are defined in EN 15227 and the requirements specified in Clause 7 for tank wagons for dangerous goods are not applicable to the buffers of these locomotives and passenger coaches. Diagonal buffers are excluded from this document. For the crashworthy buffers of locomotives, cab cars or passenger coaches according to EN 15227, and tank wagons for dangerous goods or buffers which form part of a combined system consisting of a special buffer and a deformation element, interchangeability with freight wagon buffers is not required, and therefore the requirements of 5.3 (Buffer dimensions) do not apply, those of 5.4 (Mechanical characteristics of buffers) and 5.6 (Marking) apply with restrictions. NOTE 2 For tank wagons subjected to dangerous goods regulation see [35].

PDF Catalog

PDF Pages PDF Title
2 undefined
13 1 ⁠⁠⁠⁠Scope
2 ⁠⁠⁠⁠Normative references
15 3 ⁠⁠⁠⁠Terms and definitions
18 4 ⁠⁠⁠⁠Classification and designation
4.1 ⁠⁠⁠⁠General
4.2 ⁠⁠⁠⁠Buffers with buffer stroke 105 mm (Categories A, B and C)
4.3 ⁠⁠⁠⁠Buffers with buffer stroke 110 mm
4.4 ⁠⁠⁠⁠Long stroke buffer 150 mm
4.5 ⁠⁠⁠⁠Crashworthy Buffers
19 5 ⁠⁠⁠⁠Requirements
5.1 ⁠⁠⁠⁠General
5.2 ⁠⁠⁠⁠Fixing on vehicle and interchangeability
21 5.3 ⁠⁠⁠⁠Buffer dimensions
5.4 ⁠⁠⁠⁠Mechanical characteristics of buffers
24 5.5 ⁠⁠⁠⁠Elastic systems
5.5.1 ⁠⁠⁠⁠Types of elastic systems
5.5.1.1 ⁠⁠⁠⁠General
5.5.1.2 ⁠⁠⁠⁠Functionality/Explanation
5.5.2 ⁠⁠⁠⁠Static characteristics
26 5.5.3 ⁠⁠⁠⁠Dynamic characteristics
5.6 ⁠⁠⁠⁠Marking
28 6 ⁠⁠⁠⁠Housing
6.1 ⁠⁠⁠⁠Plunger and base
6.2 ⁠⁠⁠⁠Buffer head
6.2.1 ⁠⁠⁠⁠Materials
6.2.1.1 ⁠⁠⁠⁠General
6.2.1.2 ⁠⁠⁠⁠Hardness of buffer head
6.2.1.3 ⁠⁠⁠⁠Roughness of the surface
6.2.2 ⁠⁠⁠⁠Standard dimensions of buffer head
6.2.2.1 ⁠⁠⁠⁠General
6.2.2.2 ⁠⁠⁠⁠Buffers with stroke of 105 mm and 150 mm
29 6.2.2.3 ⁠⁠⁠⁠Buffers with stroke of 110 mm
6.3 ⁠⁠⁠⁠Type and series tests
30 7 ⁠⁠⁠⁠Crashworthy buffers
7.1 ⁠⁠⁠⁠On wagons
7.2 ⁠⁠⁠⁠On other vehicles
31 Annex A ⁠⁠⁠(normative)Maximum space envelope of buffer
A.1 ⁠⁠Requirements for space envelope of buffer
A.1.1 ⁠⁠⁠Buffers for freight wagons
34 A.1.2 ⁠⁠⁠Buffers for coaches
35 A.2 ⁠⁠Notes on the definition envelopes for overall dimensions of Buffers for freight wagons
A.2.1 ⁠⁠⁠General
36 A.2.2 ⁠⁠⁠Study relating to definition of the envelope
A.2.2.1 ⁠⁠⁠Main body of buffer
37 A.2.2.2 ⁠⁠⁠Base plate
A.2.2.3 ⁠⁠⁠Head
38 Annex B ⁠⁠⁠(normative)Mechanical characteristics of buffers – Test methods
B.1 ⁠⁠General
B.2 ⁠⁠Test methodology
B.2.1 ⁠⁠⁠General
39 B.2.2 ⁠⁠⁠Force F1
B.2.3 ⁠⁠⁠Force F2
B.2.4 ⁠⁠⁠Force F3
B.2.5 ⁠⁠⁠Force F4
B.2.6 ⁠⁠⁠Force F5
40 B.2.7 ⁠⁠⁠Force F6
B.3 ⁠⁠Test documentation
42 Annex C ⁠⁠⁠(normative)Requirements for elastic systems
C.1 ⁠⁠Rubber elastomer or other elastomer elastic systems
C.1.1 ⁠⁠⁠General
C.1.2 ⁠⁠⁠Metal inserts
C.1.3 ⁠⁠⁠Constituents of rubber elastomer and/ or elastomer systems
44 C.1.4 ⁠⁠⁠Static characteristics of the spring sets
C.1.5 ⁠⁠⁠Dynamic characteristics of the spring sets
C.1.6 ⁠⁠⁠Bonding
C.1.7 ⁠⁠⁠Marking
C.1.8 ⁠⁠⁠Inspection and tests
46 C.2 ⁠⁠Friction spring/ ring spring
C.2.1 ⁠⁠⁠Manufacturer’s marks
C.2.2 ⁠⁠⁠Flexibility test
C.2.2.1 ⁠⁠⁠Requirements for flexibility test
C.2.2.2 ⁠⁠⁠Carrying out the flexibility test
47 C.2.3 ⁠⁠⁠Endurance test
C.2.4 ⁠⁠⁠Static characteristics for friction spring/ ring spring
C.2.5 ⁠⁠⁠Dynamic characteristics for friction spring/ ring spring
C.3 ⁠⁠Hydrodynamic or hydrostatic systems
C.3.1 ⁠⁠⁠General
48 C.3.2 ⁠⁠⁠Absorbing energy medium
C.3.3 ⁠⁠⁠Static test of capsules
49 C.4 ⁠⁠Combined elastic systems
50 Annex D ⁠⁠⁠(normative)Testing of static characteristics of buffers
D.1 ⁠⁠Test principle
D.2 ⁠⁠⁠Test procedure
D.3 ⁠⁠⁠Measurements
51 Annex E ⁠⁠⁠(normative)Dynamic testing
E.1 ⁠⁠⁠Dynamic testing of buffer
E.1.1 ⁠⁠⁠General
53 E.1.2 ⁠⁠⁠Temperature effects
E.2 ⁠⁠⁠Dynamic characteristics of 105 mm stroke buffer
E.2.1 ⁠⁠⁠Test programme
55 E.2.2 ⁠⁠⁠Tests for Category A to C
E.2.2.1 ⁠⁠⁠Category A
E.2.2.2 ⁠⁠⁠Category B
56 E.2.2.3 ⁠⁠⁠Category C
57 E.2.3 ⁠⁠⁠Summary of Tests on Category A to C
58 E.2.4 ⁠⁠⁠Comments on the test conditions
E.3 ⁠⁠⁠Dynamic characteristics of 150 mm stroke buffer
E.3.1 ⁠⁠⁠General
59 E.3.2 ⁠⁠⁠Comments on test conditions
E.4 ⁠⁠⁠Dynamic characteristics of 110 mm stroke buffers
61 Annex F ⁠⁠⁠(normative)Endurance testing under service load for elastic system
F.1 ⁠⁠⁠Aim of the test
F.2 ⁠⁠⁠Test principle
F.3 ⁠⁠⁠Test results to be obtained
62 F.4 ⁠⁠⁠Test procedure
F.4.1 ⁠⁠⁠Endurance test assembly
F.4.2 ⁠⁠⁠Preliminary test
63 F.4.3 ⁠⁠⁠Endurance test
F.4.4 ⁠⁠⁠Final static test
64 Annex G ⁠⁠⁠(normative)Endurance testing under buffing load for life cycle simulation
G.1 ⁠⁠⁠Endurance tests for elastic systems for freight wagons
G.1.1 ⁠⁠⁠Aim of the test
G.1.2 ⁠⁠⁠Test principle
G.1.3 ⁠⁠⁠Test results to be obtained
G.1.4 ⁠⁠⁠Test procedure
G.1.4.1 ⁠⁠⁠Assembly for the endurance test
G.1.4.2 ⁠⁠⁠Preliminary static test
G.1.4.3 ⁠⁠⁠Type test for spring systems by endurance test
66 G.1.4.4 ⁠⁠⁠Final static test
G.1.4.5 ⁠⁠⁠Additional test for elastic elements including tightness elements
G.1.5 ⁠⁠⁠Delivery of elastic systems
67 G.2 ⁠⁠⁠Endurance test for elastic system for coaches
G.2.1 ⁠⁠⁠General
G.2.2 ⁠⁠⁠Tests under alternating loads
68 G.2.3 ⁠⁠⁠Repeated buffing tests
G.2.4 ⁠⁠⁠Conditions to be observed
69 Annex H ⁠⁠⁠(informative)Guidelines for buffer head materials
H.1 ⁠⁠⁠Example of test programme requirements for verification of buffer head materials
70 H.2 ⁠⁠⁠Buffer head materials
72 Annex I ⁠⁠⁠(normative)Crashworthy buffers for tank wagons
I.1 ⁠⁠⁠Requirements for crashworthy buffers
I.1.1 ⁠⁠⁠Objectives
I.1.2 ⁠⁠⁠Additional requirements
I.2 ⁠⁠⁠Test procedure for crashworthy buffers
74 Annex J ⁠⁠⁠(normative)Maximum space envelope of crashworthy buffers
77 Annex ZA ⁠⁠⁠(informative)Relationship between this European Standard and the Essential requirements of EU Directive 2016/797/EC aimed to be covered

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BS EN 15551:2022
$215.11