Railway application - Environmental conditions - Design and test of rolling stock under severe conditions

The standard gives guidance for the design and defines criteria for validation of the rolling stock and its constituents under specific environmental conditions to which this rolling stock will be subject. It also includes availability, reliability and safety aspects which are relevant for the daily operation and the correct functioning of the rolling stock in these environmental conditions.
This standard applies to:
a. Self-propelling thermal or electric trains;
b. Thermal or electric traction units;
c. Passenger carriages;
d. Mobile railway infrastructure construction and maintenance equipment.
The nominal range of the environmental parameters is described in the EN 50125.

Bahnanwendungen - Umweltbedingungen - Konstruktion und Prüfung für Fahrzeugen für strenge Bedingungen

Die Norm gibt eine Anleitung zur Konstruktion und legt die Kriterien für die Zulassung von Eisenbahn-fahrzeugen und deren Bestandteile unter besonderen Umweltbedingungen fest, denen das Eisenbahn-fahrzeug ausgesetzt wird. Sie beinhaltet auch Betriebsbereitschafts-, Zuverlässigkeits- und Sicherheits-aspekte, die relevant für den täglichen Betrieb und die korrekte Funktion des Eisenbahnfahrzeugs in diesen Umweltbedingungen sind.
Diese Norm gilt für:
- Triebzüge mit elektrischen oder Verbrennungsmotoren;
- Triebfahrzeuge mit elektrischen oder Verbrennungsmotoren;
- Reisezugwagen;
- mobile Eisenbahn-Infrastrukturbau- und Wartungsausrüstung (schienengebundene Bau- und Instand-haltungsmaschinen basieren auf ihren Spezifikationen).
Jedoch können die Anforderungen für andere Anwendungen, die ähnliche Betriebsbedingungen aufweisen, geeignet sind.
Der Nennbereich der Umweltparameter ist in EN 50125-1 beschrieben.

Applications ferroviaires - Conditions d'environnement - Conception et essais pour véhicules ferroviaires pour conditions rigoureuses

La norme fournit des instructions en matière de conception et définit les critères de validation du matériel roulant et de ses composants dans des conditions d'environnement spécifiques auxquelles ce matériel roulant sera soumis. Elle inclut également les aspects relatifs à la disponibilité, à la fiabilité et à la sécurité, qui sont pertinents pour l'exploitation quotidienne et le bon fonctionnement du matériel roulant dans ces conditions d'environnement.
Cette norme s’applique aux :
- trains thermiques ou électriques automoteurs ;
- unités de traction thermiques ou électriques ;
- voitures de voyageurs ;
- équipements de construction et de maintenance d'infrastructures ferroviaires mobiles (les machines sur rails sont basées sur leur spécification).
Néanmoins, les exigences peuvent être appropriées pour d'autres applications ayant des conditions d'exploitation similaires.
La plage nominale des paramètres environnementaux est décrite dans l'EN 50125-1.

Železniške naprave - Okoljski pogoji - Načrtovanje in preskušanje železniških vozil v težkih razmerah

Standard podaja navodila za načrtovanje in določa merila za potrjevanje železniških vozilih in njihovih sestavnih delov v posebnih okoljskih pogojih, ki jim bodo ta železniška vozila izpostavljena. Vključuje tudi vidike glede razpoložljivosti, zanesljivosti in varnosti, ki so pomembni za vsakodnevno obratovanje ter pravilno delovanje železniških vozil v teh okoljskih pogojih.
Ta standard se uporablja za:
a.) vlake z lastnim termičnim ali električnim pogonom;
b.) termična ali električna vlečna vozila;
c.) potniške vagone;
d.) mobilno opremo za gradnjo in vzdrževanje železniške infrastrukture.
Nominalno območje okoljskih parametrov je opisano v standardu EN 50125.

General Information

Status
Published
Public Enquiry End Date
24-Jul-2011
Publication Date
06-Mar-2016
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
02-Mar-2016
Due Date
07-May-2016
Completion Date
07-Mar-2016

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SLOVENSKI STANDARD
SIST-TP CEN/TR 16251:2016
01-april-2016

äHOH]QLãNHQDSUDYH2NROMVNLSRJRML1DþUWRYDQMHLQSUHVNXãDQMHåHOH]QLãNLKYR]LO

YWHåNLKUD]PHUDK

Railway application - Environmental conditions - Design and test of rolling stock under

severe conditions

Bahnanwendungen - Umweltbedingungen - Konstruktion und Prüfung für Fahrzeugen für

strenge Bedingungen

Applications ferroviaires - Conditions d'environnement - Conception et essais pour

véhicules ferroviaires pour conditions rigoureuses
Ta slovenski standard je istoveten z: CEN/TR 16251:2016
ICS:
45.060.01 Železniška vozila na splošno Railway rolling stock in
general
SIST-TP CEN/TR 16251:2016 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST-TP CEN/TR 16251:2016
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SIST-TP CEN/TR 16251:2016
CEN/TR 16251
TECHNICAL REPORT
RAPPORT TECHNIQUE
February 2016
TECHNISCHER BERICHT
ICS 45.060.01
English Version
Railway applications - Environmental conditions - Design
guidance for rolling stock

Applications ferroviaires - Conditions d'environnement Bahnanwendungen - Umweltbedingungen -

- Lignes directrices pour la conception du matériel Konstruktionsempfehlungen für Schienenfahrzeuge

roulant

This Technical Report was approved by CEN on 15 January 2015. It has been drawn up by the Technical Committee CEN/TC 256.

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: Avenue Marnix 17, B-1000 Brussels

© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TR 16251:2016 E

worldwide for CEN national Members.
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Contents Page

European foreword ....................................................................................................................................................... 5

Introduction .................................................................................................................................................................... 6

1 Scope .................................................................................................................................................................... 6

2 Normative references .................................................................................................................................... 6

3 Terms and definitions ................................................................................................................................... 6

4 Overview – List of covered topics .............................................................................................................. 8

5 Design guidance for vehicle ......................................................................................................................... 9

5.1 General ................................................................................................................................................................ 9

5.2 Temperature related ..................................................................................................................................... 9

5.3 Snow and ice related ...................................................................................................................................... 9

5.3.1 Ice related .......................................................................................................................................................... 9

5.3.2 Snow related ..................................................................................................................................................... 9

5.3.3 Anti-icing and de-icing ............................................................................................................................... 10

5.4 Humidity related .......................................................................................................................................... 10

5.4.1 General ............................................................................................................................................................. 10

5.4.2 Test description ............................................................................................................................................ 11

5.4.3 Evaluation criteria ....................................................................................................................................... 11

5.5 Thermal insulation ...................................................................................................................................... 12

5.6 Mechanical fixations of inner structures to the car body, have to be thermally

interrupted by insulating spacers to avoid thermal bridges. Collision with animals ......... 12

5.7 Condensation ................................................................................................................................................. 12

5.7.1 General ............................................................................................................................................................. 12

5.7.2 Recommendations ....................................................................................................................................... 13

5.7.3 Test description ............................................................................................................................................ 13

5.7.4 Evaluation criteria ....................................................................................................................................... 13

6 Design guidance for sub systems ............................................................................................................ 13

6.1 Snow plough ................................................................................................................................................... 13

6.1.1 General ............................................................................................................................................................. 13

6.1.2 Design guidance ............................................................................................................................................ 13

6.1.3 Proposal for evaluation ............................................................................................................................. 14

6.2 Bogie and running gear .............................................................................................................................. 16

6.2.1 General ............................................................................................................................................................. 16

6.2.2 Winter conditions ........................................................................................................................................ 16

6.2.3 Summer conditions ..................................................................................................................................... 16

6.2.4 Design guidance ............................................................................................................................................ 16

6.3 Brake components integrated in bogie ................................................................................................ 18

6.3.1 General ............................................................................................................................................................. 18

6.3.2 Design guidance ............................................................................................................................................ 18

6.3.3 Proposal for evaluation ............................................................................................................................. 19

6.4 Compressed air ............................................................................................................................................. 21

6.4.1 General ............................................................................................................................................................. 21

6.4.2 Design guidance ............................................................................................................................................ 21

6.5 Sanding equipment ...................................................................................................................................... 21

6.5.1 General ............................................................................................................................................................. 21

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6.5.2 Design guidance ............................................................................................................................................ 22

6.5.3 Proposal for evaluation .............................................................................................................................. 22

6.6 Suspension level control system ............................................................................................................. 23

6.6.1 General ............................................................................................................................................................. 23

6.6.2 Design guidance ............................................................................................................................................ 23

6.6.3 Proposal for evaluation .............................................................................................................................. 23

6.7 Tilting system ................................................................................................................................................. 23

6.7.1 General ............................................................................................................................................................. 23

6.7.2 Design guidance ............................................................................................................................................ 24

6.7.3 Proposal for evaluation .............................................................................................................................. 24

6.8 Flange lubrication system ......................................................................................................................... 24

6.8.1 General ............................................................................................................................................................. 24

6.8.2 Design guidance ............................................................................................................................................ 25

6.9 Windscreen ..................................................................................................................................................... 25

6.9.1 General ............................................................................................................................................................. 25

6.9.2 Design guidance ............................................................................................................................................ 25

6.9.3 Proposal for evaluation .............................................................................................................................. 25

6.10 Side mirrors/cameras ................................................................................................................................. 27

6.10.1 General ............................................................................................................................................................. 27

6.10.2 Design guidance ............................................................................................................................................ 27

6.10.3 Proposal for evaluation .............................................................................................................................. 27

6.11 Lights ................................................................................................................................................................. 28

6.11.1 General ............................................................................................................................................................. 28

6.11.2 Design guidance ............................................................................................................................................ 28

6.11.3 Proposal for evaluation .............................................................................................................................. 28

6.12 Horns ................................................................................................................................................................. 29

6.12.1 General ............................................................................................................................................................. 29

6.12.2 Design guidance ............................................................................................................................................ 29

6.13 Doors ................................................................................................................................................................. 30

6.13.1 General ............................................................................................................................................................. 30

6.13.2 Design guidance ............................................................................................................................................ 30

6.13.3 Proposal for evaluation .............................................................................................................................. 30

6.14 Moveable steps .............................................................................................................................................. 31

6.14.1 General ............................................................................................................................................................. 31

6.14.2 Design guidance ............................................................................................................................................ 31

6.14.3 Proposal for evaluation .............................................................................................................................. 31

6.15 Pantograph ...................................................................................................................................................... 32

6.15.1 General ............................................................................................................................................................. 32

6.15.2 Design guidance ............................................................................................................................................ 32

6.15.3 Proposal for evaluation .............................................................................................................................. 33

6.16 Automatic couplers ...................................................................................................................................... 33

6.16.1 General ............................................................................................................................................................. 33

6.16.2 Design guidance ............................................................................................................................................ 34

6.16.3 Proposal for evaluation .............................................................................................................................. 34

6.17 Cooling systems ............................................................................................................................................. 35

6.17.1 General ............................................................................................................................................................. 35

6.17.2 Design guidance ............................................................................................................................................ 35

6.17.3 Proposal for evaluation .............................................................................................................................. 35

6.18 Traction ............................................................................................................................................................ 36

6.18.1 General ............................................................................................................................................................. 36

6.18.2 Design guidance ............................................................................................................................................ 36

6.19 Battery .............................................................................................................................................................. 37

6.19.1 General ............................................................................................................................................................. 37

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6.19.2 Design guidance ............................................................................................................................................ 37

6.20 Toilet and water systems .......................................................................................................................... 38

6.20.1 General ............................................................................................................................................................. 38

6.20.2 Design guidance ............................................................................................................................................ 38

6.20.3 Proposal for evaluation ............................................................................................................................. 38

6.21 External cabinets, boxes for equipment, cables and connectors ................................................ 40

6.21.1 General ............................................................................................................................................................. 40

6.21.2 Design guidance ............................................................................................................................................ 40

6.21.3 Proposal for evaluation ............................................................................................................................. 40

Annex A (informative) Examples of protection for electrical and pneumatic connections ........... 41

Annex B (informative) Examples for snow ploughs ...................................................................................... 43

Bibliography ................................................................................................................................................................. 45

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European foreword

This document (CEN/TR 16251:2016) has been prepared by Technical Committee CEN/TC 256

“Railway applications”, the secretariat of which is held by DIN.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent

rights.
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Introduction

In this Technical Report, environmental conditions are related to climate and big animals. Separately

and in combination environmental conditions can represent considerable challenges to the railway

sector as availability, economy, reputation and safety can be severely affected. Both severe summer and

winter conditions occur, and more intense weather is predicted for the future.

The intention of this Technical Report is to help reduce technical risks related to environmental

conditions.

All tests of the different clauses in this Technical Report can be performed either in a climate chamber

or on track, if the corresponding test conditions are given.
1 Scope

This Technical Report gives guidance for designing rolling stock for its specified ranges of

environmental conditions according to EN 50125-1. This guidance covers environmental conditions in

Europe.

The relevant clauses for the particular vehicle should be chosen and described in the vehicle

specification. Depending on the ranges selected, design and/or testing provisions described in this

Technical Report should be taken into account. This Technical Report is a collection of existing test

descriptions and design guidance based on long lasting experience of operators, test centres and

industry.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated

references, the latest edition of the referenced document (including any amendments) applies.

EN 50125-1, Railway applications — Environmental conditions for equipment — Part 1: Equipment on

board rolling stock
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
environmental conditions

physical, chemical or biological conditions external to a product to which it is subject at a certain time

[SOURCE: EN 50125-1]
3.2
winter conditions

conditions with temperatures below freezing point of water, where snow and ice can accumulate on the

vehicle
3.3
summer conditions

conditions with temperatures above 35 °C in addition to intensive solar radiation and hot ballast effect

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3.4
ice
is considered as glaze ice or clear ice

Note 1 to entry: It tends to accumulate rapidly and is very hard and therefore more difficult to remove. Such ice

forms when large drops of water strike and spread over a surface whose temperature is below the freezing point.

Mechanical components and the windscreen are elements typically tested with ice. For the test, a certain thickness

of the ice layer is defined.
3.5
dry snow

form of precipitation where tiny ice crystals bond together into flakes, which have little to no liquid

water content and a particle size of about 20 µm MVD (Median Volumetric Diameter)

3 3

Note 1 to entry: The density of this snow is about 200 kg/m and can go up to 350 kg/m if wind pressed.

Note 2 to entry: The snow intensity in kg/m is defined.
3.6
wet snow

form of precipitation where tiny ice crystals bond together into flakes, which have a high liquid content

and a particle size of 50 µm or more
3 3
Note 1 to entry: The density of this snow is about 350 kg/m to 500 kg/m .
Note 2 to entry: The snow intensity in kg/m is defined.
3.7
rain

precipitation in the form of water drops; both the amount that falls and the actual falling action of the

water drops are often called rainfall
Note 1 to entry: Rain intensity is measured in mm/min.

Note 2 to entry: This standard does not scope with tests concerning water tightness of the vehicle and

components.
3.8
condensation

precipitation of water vapour on a surface when the surface temperature is lower than the dew point

temperature of the ambient air whereby water is transformed from vapour to the liquid state of

aggregation
3.9
temperature class
classification system defined in EN 50125-1
3.10
hot ballast effect
heat accumulation of the ballast caused by solar radiation

Note 1 to entry: Heat accumulation of the ballast is caused not only by solar radiation but also by exhausts from

cooling systems, braking resistors or similar devices and subsystems along the train.

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4 Overview – List of covered topics

The following Table 1 is an overview of the covered topics of this document and helps to identify the

relevant clause for the user.
Table 1 — System overview
System/ Clause/ Ice Dry Wet Rain Humidity High Low
component Sub- snow snow temperature temperature
clause
Design guidance for 5 X X X X X X X
vehicle
Sub systems
Snow plough 6.1 X X
Bogie and running 6.2 X X X X X X X
gear
Brakes 6.3 X X X X X
Compressed air 6.4 X X X
Sanding equipment 6.5 X X X X X X
Suspension level 6.6 X X X
control system
Tilting system 6.7 X X X X
Flange lubrication 6.8 X X
system
Windscreen 6.9 X X X X X
Side 6.10 X X X
mirrors/cameras
Lights 6.11 X X X
Horns 6.12 X X X X
Doors 6.13 X X X X X X
Moveable steps 6.14 X X X X X X
Pantograph 6.15 X X X
Automatic couplers 6.16 X X X X
Cooling systems 6.17 X X X X
Traction 6.18 X
Battery 6.19 X
Toilet and water 6.20 X
systems
External cabinets, 6.21 X X X X X
boxes for
equipment, cables
and connectors
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5 Design guidance for vehicle
5.1 General

This clause includes vehicle design guidance related to environmental conditions.

The environmental conditions in Table 2 are covered.
Table 2 — Design guidance for vehicle
Ice Dry snow Wet snow Rain Humidity High Low
temperature temperature
X X X X X X X
5.2 Temperature related

When choosing materials and their combinations, thermal expansion characteristics should be

considered, e.g. aluminium car bodies have approximately 3 times the thermal expansion compared to

steel bodies.

Bending and/or tension caused due to thermal expansion differences can be avoided by e.g. arranging

gaps between interior panels and at the ends of floor elements which take care of the expansion

movement. Material used for components for underframe and bogie should withstand temperatures

higher than the upper extreme temperatures which are caused by e.g. hot ballast.

Materials used for components outside of the vehicle body and bogies can be exposed to temperatures

lower than the lowest and higher than the highest specified extreme temperatures (see EN 50125-1).

5.3 Snow and ice related
5.3.1 Ice related

The vehicle should be designed to avoid damage to. E.g. side walls, underframe equipment, cables,

hoses, windows and doors from:
— ice falling down from accumulations in underframe and running gear;

— ballast stones lifted by the ice falling down from underframe and running gear;

— ice lumps from the snow plough thrown into, for instance cutting walls reflected back to the train;

— ice build-ups falling from tunnel roofs and walls;
— ice lumps lifted by the air turbulence generated by the movement of the train.
5.3.2 Snow related

Bogies, coupler and its ancillaries, roof, cab and underframe are areas, which are exposed to snow

accumulation. As measurement of thickness or weight of snow and ice layers is difficult to perform in

service to get limit values, design should be chosen in such a way that accumulation is minimised and

preferably avoided.

This can be achieved by protection or enclosure of components, geometric shape or choice of materials,

which have reduced adhesion.

In the absence of project specific requirements for the accumulation of snow and ice, the following

additional mass to be considered.
— 0,5 t to 1,5 t per bogie;
NOTE The weight is based on experiences made in Sweden.
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5.3.3 Anti-icing and de-icing

At winter conditions with snow on the line and/or in the air and the temperature in the range of

approximately −10 °C or lower, snow will accumulate primarily in the running gear and at underframe

components. This will reduce the possibility to inspect the condition of safety and operational critical

parts/components. Build-up of snow and ice also will reduce the possibility for free movements of

parts/components in the running gear and brake system, hence causing reduced running comfort and

probability for r
...

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