Resilient,textile and laminate floor coverings - Castor chair test (ISO 4918:2016)

ISO 4918:2016 specifies methods for determining the change of appearance and stability of a textile floor covering or any damage caused by detachment of layers, opening of joints, or crazing of a resilient or laminate floor covering under the movement of a castor chair.

Elastische, textile und Laminat-Bodenbeläge - Stuhlrollenversuch (ISO 4918:2016)

Revêtements de sol textiles, résilients ou stratifiés - Essai à l'appareil à roulettes (ISO 4918:2016)

Netekstilne, tekstilne in laminatne talne obloge - Preskus s stolom na kolescih (ISO 4918:2016)

General Information

Status
Published
Public Enquiry End Date
30-Nov-2020
Publication Date
15-Apr-2021
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
07-Apr-2021
Due Date
12-Jun-2021
Completion Date
16-Apr-2021

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SLOVENSKI STANDARD
SIST EN ISO 4918:2021
01-maj-2021
Nadomešča:
SIST EN 425:2002
Netekstilne, tekstilne in laminatne talne obloge - Preskus s stolom na kolescih
(ISO 4918:2016)

Resilient,textile and laminate floor coverings - Castor chair test (ISO 4918:2016)

Elastische, textile und Laminat-Bodenbeläge - Stuhlrollenversuch (ISO 4918:2016)

Revêtements de sol textiles, résilients ou stratifiés - Essai à l'appareil à roulettes (ISO

4918:2016)
Ta slovenski standard je istoveten z: EN ISO 4918:2021
ICS:
97.150 Talne obloge Floor coverings
SIST EN ISO 4918:2021 en,fr,de

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

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SIST EN ISO 4918:2021
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SIST EN ISO 4918:2021
EN ISO 4918
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2021
EUROPÄISCHE NORM
ICS 97.150 Supersedes EN 425:2002
English Version
Resilient,textile and laminate floor coverings - Castor chair
test (ISO 4918:2016)

Revêtements de sol textiles, résilients ou stratifiés - Elastische, textile und Laminat-Bodenbeläge -

Essai à l'appareil à roulettes (ISO 4918:2016) Stuhlrollenversuch (ISO 4918:2016)

This European Standard was approved by CEN on 19 March 2021.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, 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: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4918:2021 E

worldwide for CEN national Members.
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SIST EN ISO 4918:2021
EN ISO 4918:2021 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

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SIST EN ISO 4918:2021
EN ISO 4918:2021 (E)
European foreword

The text of ISO 4918:2016 has been prepared by Technical Committee ISO/TC 219 "Floor coverings” of

the International Organization for Standardization (ISO) and has been taken over as EN ISO 4918:2021

by Technical Committee CEN/TC 134 “Resilient, textile and laminate floor coverings” the secretariat of

which is held by NBN.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by September 2021, and conflicting national standards

shall be withdrawn at the latest by September 2021.

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

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 425:2002.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,

Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of

North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the

United Kingdom.
Endorsement notice

The text of ISO 4918:2016 has been approved by CEN as EN ISO 4918:2021 without any modification.

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SIST EN ISO 4918:2021
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SIST EN ISO 4918:2021
INTERNATIONAL ISO
STANDARD 4918
Second edition
2016-03-15
Resilient, textile and laminate floor
coverings — Castor chair test
Revêtements de sol textiles, résilients ou stratifiés — Essai à l’appareil
à roulettes
Reference number
ISO 4918:2016(E)
ISO 2016
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SIST EN ISO 4918:2021
ISO 4918:2016(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2016, Published in Switzerland

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form

or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior

written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of

the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2016 – All rights reserved
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SIST EN ISO 4918:2021
ISO 4918:2016(E)
Contents Page

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

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

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

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Principle ........................................................................................................................................................................................................................ 1

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

6 Materials ....................................................................................................................................................................................................................... 5

7 Sampling ........................................................................................................................................................................................................................ 5

7.1 Textile floor coverings ...................................................................................................................................................................... 5

7.2 Resilient floor covering .................................................................................................................................................................... 6

7.3 Laminate floor coverings ................................................................................................................................................................ 6

8 Conditioning .............................................................................................................................................................................................................. 7

8.1 Textile floor coverings ...................................................................................................................................................................... 7

8.2 Resilient and laminate floor coverings ............................................................................................................................... 7

9 Procedure..................................................................................................................................................................................................................... 7

9.1 Textile floor coverings ...................................................................................................................................................................... 7

9.1.1 General...................................................................................................................................................................................... 7

9.1.2 Mounting of the specimens ..................................................................................................................................... 7

9.1.3 Verifications of the castors ...................................................................................................................................... 7

9.1.4 Preparing of the apparatus ..................................................................................................................................... 8

9.1.5 Test procedures for textile floor coverings ............................................................................................... 8

9.2 Resilient and laminate floor coverings ............................................................................................................................... 9

9.2.1 General...................................................................................................................................................................................... 9

9.2.2 Mounting of the specimen ....................................................................................................................................... 9

9.2.3 Verification of the castors .....................................................................................................................................10

9.2.4 Preparing the apparatus ........................................................................................................................................10

9.2.5 Test procedure for resilient and laminate floor coverings .......................................................10

10 Assessment ..............................................................................................................................................................................................................10

10.1 Textile floor coverings ...................................................................................................................................................................10

10.1.1 General...................................................................................................................................................................................10

10.1.2 Test A — Structural integrity assessment ...............................................................................................11

10.1.3 Test A — Appearance retention assessment ........................................................................................11

10.1.4 Test B — Colour change assessment ...........................................................................................................11

10.1.5 Test C — Structural integrity assessment ...............................................................................................11

10.2 Resilient floor coverings ..............................................................................................................................................................11

10.2.1 Resilient floor covering with click joints for floating installation ......................................11

10.3 Laminate floor coverings .............................................................................................................................................................11

11 Calculations and expression of results .......................................................................................................................................12

11.1 Textile floor coverings ...................................................................................................................................................................12

11.1.1 Optional results for textile floor coverings ............................................................................................12

11.2 Resilient floor coverings ..............................................................................................................................................................12

11.3 Laminate floor coverings .............................................................................................................................................................12

12 Test report ................................................................................................................................................................................................................12

© ISO 2016 – All rights reserved iii
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SIST EN ISO 4918:2021
ISO 4918:2016(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).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the meaning of ISO specific terms and expressions related to conformity

assessment, as well as information about ISO’s adherence to the WTO principles in the Technical

Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information

The committee responsible for this document is ISO/TC 219, Floor coverings.

This second edition cancels and replaces the first edition (ISO 4918:2009), which has been technically

revised.
iv © ISO 2016 – All rights reserved
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SIST EN ISO 4918:2021
INTERNATIONAL STANDARD ISO 4918:2016(E)
Resilient, textile and laminate floor coverings — Castor
chair test
1 Scope

This International Standard specifies methods for determining the change of appearance and stability

of a textile floor covering or any damage caused by detachment of layers, opening of joints, or crazing of

a resilient or laminate floor covering under the movement of a castor chair.
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.

ISO 139, Textiles — Standard atmospheres for conditioning and testing

ISO 1957, Machine-made textile floor coverings — Selection and cutting of specimens for physical tests

ISO 2424, Textile floor coverings — Vocabulary
ISO 9405, Textile floor coverings — Assessment of changes in appearance

CEN/TS 16354, Laminate floor coverings — Underlays — Specification, requirements and test methods

EN 12466, Resilient floor coverings — Vocabulary
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 2424 and EN 12466 apply.

4 Principle

A floor covering, including one or more joints, treated or welded where necessary, is submitted for a

prescribed number of cycles to the action of three castors. The castors move in epicyclical paths with

multiple changes of direction, stops and starts, and the frequency of passage varies from area to area.

For textile floor coverings, three different assessment methods are specified:

a) the change in appearance of a textile floor covering is assessed after 5 000 cycles and 25 000 cycles,

in accordance with ISO 9405 (Test A),

b) the change in colour is assessed by means of grey scales after 750 cycles (Test B),

c) the extent of deterioration of the specimen is assessed after 10 000 cycles or 25 000 cycles (Test C).

For resilient and laminate floor coverings, any damage caused by detachment of layers, opening of

joints, or crazing of the specimen is assessed.
© ISO 2016 – All rights reserved 1
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SIST EN ISO 4918:2021
ISO 4918:2016(E)
5 Apparatus
Dimensions in millimetres
Key
1 total mass 90 kg 6 specimen
2 distance >3 mm 7 suction device with height regulation
3 load/drive plate 8 test platform
4 castor mounting plate 9 specimen support
5 chain
Figure 1 — Typical castor chair apparatus
5.1 Rotating circular test platform.

The rotating circular test platform on which the specimen is placed shall have a diameter of

minimum 800 mm.
5.2 Castor assembly.

This assembly comprises a vertical shaft, set in a bearing, and a plate on which the castors are mounted

(Figure 2, item 1). This castor assembly is offset at a distance of (198 ± 1) mm from the centre of the

rotating test platform.

The three castors are each arranged concentrically at 120° intervals around the centre of the plate at

a distance of (130 ± 1) mm from the centre of the plate, and are free to rotate, so that they follow the

rotation of the castor assembly.

The tested area of the specimen is determined by the distance between the axes of revolution of the

castor chair assembly and the specimen table and by the distance of the castors from the centre of the

plate. This area is approximately 0,3 m .

The apparatus is provided with a lifting device to raise the castor assembly above the testing platform

when the apparatus is stopped.
2 © ISO 2016 – All rights reserved
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SIST EN ISO 4918:2021
ISO 4918:2016(E)

The castor assembly is loaded with a mass of (90 ± 1) kg equally divided over the three castors.

The distance (under load) between the castor mounting plate and the load/drive plate shall be >3 mm.

Key
1 castor assembly
Figure 2 — Path of castors
5.3 Drive mechanism.

The drive to the specimen plate and to the castor assembly is interlocked and fitted with a reversing

mechanism. The number of cycles is set by means of a pre-set counter. The rotational speed of the

rotating platform shall be (19 ± 2) r/min and that of the castor assembly (50 ± 5) r/min.

After (180 ± 10) s of rotation, the platform shall stop and remain in the stop position for (5 ± 2) s, after

which time the direction of rotation of the rotating platform shall reverse.

The relationship between the rotational speed of the specimen plate and that of the castor assembly

causes a sharp reverse movement of the castors within the stressed area (see Figure 2).

5.4 Suction device.

A suction device (Figure 1, item 7) is mounted over the entire width of the stressed area, the height of

this device above the specimen being adjustable. The suction capacity shall be at least 25 l/s to 30 l/s.

5.5 Castors.
5.5.1 General

Single-wheel swivel castors shall be used having the following dimensions (see Figure 3):

a) diameter: (50 ± 2) mm;
b) width: (20 ± 2) mm;
c) radius of curvature, R, of castor tread: (130 ± 5) mm;
d) crank distance: (32 ± 2) mm.
The distance between any two castor mountings shall be (225 ± 5) mm.
© ISO 2016 – All rights reserved 3
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SIST EN ISO 4918:2021
ISO 4918:2016(E)
Figure 3 — Single-wheel swivel castors (nominal dimensions in mm)

5.5.2 Type H castors, suitable for textile, resilient, and laminate floor coverings.

Type H, polyamide castors have plain wheels and a hard tread, shore hardness 90 ± 5. The wheels

shall be one colour over th
...

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