ISO/DIS 22074-5

Railway infrastructure -- Rail fastening systems

Infrastructure ferroviaire -- Systèmes de fixation du rail

Standards Content (sample)

DRAFT INTERNATIONAL STANDARD
ISO/DIS 22074-5
ISO/TC 269/SC 1 Secretariat: AFNOR
Voting begins on: Voting terminates on:
2020-10-05 2020-12-28
Railway infrastructure — Rail fastening systems —
Part 5:
Test method for electrical resistance
Infrastructure ferroviaire — Systèmes de fixation du rail —
Partie 5: Méthode d'essai pour la détermination de résistance électrique
ICS: 45.080
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ISO/DIS 22074-5:2020(E)
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ISO/DIS 22074-5:2020(E)
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ISO/DIS 22074-5:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions, symbols and abbreviations ......................................................................................................... 1

3.1 Terms and definitions ....................................................................................................................................................................... 1

3.2 Symbols and abbreviations .......................................................................................................................................................... 1

4 Principle ........................................................................................................................................................................................................................ 2

5 Apparatus ..................................................................................................................................................................................................................... 2

5.1 Rail ..................................................................................................................................................................................................................... 2

5.2 Water ............................................................................................................................................................................................................... 2

5.2.1 Standard "wet" conditions....................................................................................................................................... 2

5.2.2 Optional additional test conditions ................................................................................................................. 2

5.3 Spray equipment ................................................................................................................................................................................... 2

5.4 Electricity supply .................................................................................................................................................................................. 2

5.5 Instruments ............................................................................................................................................................................................... 2

5.6 Water collection and re-cycling equipment ................................................................................................................... 3

6 Test specimens (reference method) ................................................................................................................................................. 3

7 Procedure (reference method) .............................................................................................................................................................. 3

8 Test specimens – Alternative method ............................................................................................................................................. 5

9 Procedure – Alternative method .......................................................................................................................................................... 5

10 Calculations................................................................................................................................................................................................................ 5

11 Test report ................................................................................................................................................................................................................... 6

© ISO 2020 – All rights reserved iii
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ISO/DIS 22074-5:2020(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

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

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

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constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 269, Railway applications, Subcommittee

SC 01, Infrastructure.
A list of all parts in the ISO 22074 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved
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ISO/DIS 22074-5:2020(E)
Introduction

This test procedure is used to assess the rail-to-rail electrical resistance relevant to rail fastenings used

in locations where track circuit signalling systems are used.
...