EN 994-2012 en Textile floor coverings - Determination of the side length squareness and straightness of tiles《铺地织物 瓷砖边长 方正度和平直度的测定》.pdf

1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 994:2012Textile floor coverings Determination of the sidelength, squareness andstraightness of tilesBS EN 994:2012 BRITISH STANDARDNational forewordThis British Standard is

2、 the UK implementation of EN 994:2012. Itsupersedes BS EN 994:1996 which is withdrawn.BSI, as a member of CEN, is obliged to publish EN 994:2012 as aBritish Standard. However, attention is drawn to the fact that duringthe development of this European Standard, the UK committeevoted against its appro

3、val as a European Standard. The UK committee is concerned that this standard may notadequately describe test methods used to measure squareness. UKusers can consult BS 5921:1980 for further guidance on determiningsquareness in textile floor coverings, as it is considered that BS5921:1980 provides mo

4、re information and precision of measurementthan EN 994 in this area.The recently adopted BS EN ISO 24342:2012, Resilient and textilefloor-coverings - Determination of side length, edge, straightnessand squareness of tiles, also provides guidance on this subject.However, users should be aware that EN

5、 994 is included as anormative reference in several EN standards, including BS EN 1307and BS EN 13297:2007, and compliance with it offers a presumptionof conformity that does not apply to BS EN ISO 24342:2012 or BS5921:1980.The UK participation in its preparation was entrusted to TechnicalCommittee

6、PRI/3/60, Textile b) The linearity error of the straight edges shall be less than or equal to 0,01 mm; c) The angular error shall be less than or equal to 0,02 mm at 300 mm. BS EN 994:2012EN 994:2012 (E) 5 4.2.2 Flat surface Flat surface as described in 4.1.2. 4.2.3 Rigid plate Rigid plate as descri

7、bed in 4.1.3. 4.2.4 Shims Set of shims, including 0,2 mm to 2,0 mm shims. 5 Sampling and preparation of test specimens Take at least five tiles from each sample to represent the test specimens. If the sample comprises a pack of tiles, ensure that the first and last tiles are not used as test specime

8、ns. 6 Conditioning Condition the tiles in the standard atmosphere for testing textiles as defined in EN ISO 139 for at least 24 h. Conduct the tests in this atmosphere. 7 Test method 7.1 Length Hold the test specimen flat using, the rigid plate described in 4.1.3. Measure the distance between the ed

9、ges parallel to the direction of manufacture, then between the edges perpendicular to the direction of manufacture, in at least two different points. If a different device is used, proceed as appropriate. 7.2 Squareness and straightness Place the tile with its back against the flat support plate. Pl

10、ace one edge of test specimen against a straight edge of the square or appropriate device and slide it until it makes contact with the other straight edge, then position the rigid plate without moving the tile. Select the thickest shim which can be easily inserted between the second straight edge of

11、 the square and the end of the edge of the tile to evaluate the squareness deviation (see Figures 1 and 2). Find the thickest shim which can easily be inserted at any point between the second straight edge of the square and the tile to evaluate the straightness of the edges (see Figure 3). Repeat th

12、is procedure for the three other test specimen edges. If a different device is used, proceed as appropriate. BS EN 994:2012EN 994:2012 (E) 6 Figure 1 Squareness Figure 2 Squareness Figure 3 Straightness BS EN 994:2012EN 994:2012 (E) 7 8 Calculation and expression of results 8.1 Length For each tile

13、and direction, calculate the average of the measurements taken. Express the length of the edge by the result obtained in millimetres to one decimal place. 8.2 Straightness and squareness Express the maximum deviation for each edge of each tile in millimetres to an accuracy of 0,05 mm. a) For the end

14、 of the edge for squareness; b) At any point of the edge for straightness. Note the biggest deviation of a) or b) for each side. Calculate the determined maximum deviation (in mm) for squareness and straightness in percentage from the nominal side length of the tile (in mm) by the following formula:

15、 D = (M / N) x 100%) where D is deviation in % M is maximum deviation in mm N is nominal tile dimension in mm 9 Test report The test report shall include the following information: a) reference to this European Standard, i.e. EN 994:2012; b) complete identification of the product tested, including t

16、he type, origin, manufacturers reference numbers; c) details of the sample; d) number of test specimens (tiles) submitted for testing; e) average general length for each direction; f) difference between the smallest and largest average length for each direction; g) value of the deviation for each ed

17、ge of each tile and if this relates to squareness or straightness; h) any deviation from this standard which is likely to have affected the results. This page deliberately left blankThis page deliberately left blankBSI is the independent national body responsible for preparing British Standards and

18、other standards-related publications, information and services. It presents the UK view on standards in Europe and at the international level. BSI is incorporated by Royal Charter. British Standards and other standardisation products are published by BSI Standards Limited.British Standards Instituti

19、on (BSI)raising standards worldwideBSI389 Chiswick High Road London W4 4AL UKTel +44 (0)20 8996 9001Fax +44 (0)20 8996 Standards and PASs are periodically updated by amendment or revision. Users of British Standards and PASs should make sure that they possess the latest amendments or editions.It is

20、 the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using British Standards would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside frontcover

21、. Similary for PASs, please notify BSI Customer Services.Tel: +44 (0)20 8996 9001 Fax: +44 (0)20 8996 7001BSI offers BSI Subscribing Members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of British Standards and PASs.Tel: +44 (0)2

22、0 8996 7669 Fax: +44 (0)20 8996 7001Email: Buying standardsYou may buy PDF and hard copy versions of standards directly using acredit card from the BSI Shop on the website addition all orders for BSI, international and foreign standards publicationscan be addressed to BSI Customer Services.Tel: +44

23、 (0)20 8996 9001 Fax: +44 (0)20 8996 7001Email: In response to orders for international standards, BSI will supply the British Standard implementation of the relevant international standard, unless otherwise requested.Information on standardsBSI provides a wide range of information on national, Euro

24、peanand international standards through its Knowledge Centre.Tel: +44 (0)20 8996 7004 Fax: +44 (0)20 8996 7005Email: BSI Subscribing Members are kept up to date with standards developments and receive substantial discounts on the purchase priceof standards. For details of these and other benefits co

25、ntact Membership Administration. Tel: +44 (0)20 8996 7002 Fax: +44 (0)20 8996 7001 Email: Information regarding online access to British Standards and PASs via British Standards Online can be found at information about British Standards is available on the BSI website at www.bsi- the data, softwar

26、e and documentation set out in all British Standards and other BSI publications are the property of and copyrighted by BSI, or some person or entity that own copyright in the information used (such as the international standardisation bodies) has formally licensed such information to BSI for commeri

27、cal publication and use. Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means electronic, photocopying, recording or otherwise without prior written permission from BSI. This does n

28、ot preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. Details and advice can be obtained from the Copyright & Licensing Department.Tel: +44 (0)20 8996 7070Email: