1、BRITISH STANDARD BS EN ISO 24340:2012Resilient floor coverings Determination of ICS 97.150nullnull nullnullnullnullnullnullnull nullnullnullnullnullnullnull nullnullnull nullnullnullnullnullnullnullnullnullnull nullnullnullnullnullnull nullnull nullnullnullnullnullnullnullnullnull nullnull nullnulln
2、ullnullnullnullnullnullnull nullnullnullthickness of layers This British Standard is the UK implementation of EN ISO 24340:2012. It is identical to ISO 24340:2006. It supersedes BS EN 429:1993 and BS ISO 24340:2006, which are withdrawn.The UK participation in its preparation was entrusted to Technic
3、al Committee PRI/60, Resilient floor coverings.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with
4、a British Standard cannot confer immunity from legal obligations.BS EN ISO 24340:2012This British Standard waspublished under the authorityof the Standards Policy andStrategy Committeeon 28 April 2006 The British Standards Institution 2012. Published by BSI Standards Limited 2012.Amendments/corrigen
5、da issued since publicationDateComments 31 March 2012 This corrigendum renumbers BS ISO 24340:2006 as BS EN ISO 24340:2012ISBN 978 0 580 75242 1National forewordEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 24340 February 2012 ICS 97.150 Supersedes EN 429:1993English Version Resilient flo
6、or coverings - Determination of thickness of layers (ISO 24340:2006) Revtements de sols rsilients - Dtermination de lpaisseur des couches (ISO 24340:2006) Elastische Bodenbelge - Bestimmung der Dicke der Schichten (ISO 24340:2006) This European Standard was approved by CEN on 24 December 2011. CEN m
7、embers 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 applic
8、ation 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 Mana
9、gement 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, Nether
10、lands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploi
11、tation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 24340:2012: EForeword The text of ISO 24340:2006 has been prepared by Technical Committee ISO/TC 219 “Floor coverings” of the International Organization for Standardization (ISO) and has been taken over
12、as EN ISO 24340:2012 by Technical Committee CEN/TC 134 “Resilient, textile and laminate floor coverings” the secretariat of which is held by BSI. 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 Au
13、gust 2012, and conflicting national standards shall be withdrawn at the latest by August 2012. 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
14、 rights. This document supersedes EN 429:1993. 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, Fra
15、nce, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 24340:2006 has been approved by CEN as a EN
16、ISO 24340:2012 without any modification. iiiBS EN ISO 24340:2012 EN ISO 24340:2012 (E)1Resilient floor coverings Determination of thickness of layers1 Scope This International Standard describes a method for determining the thickness of different layers of resilient floor coverings. 2 Terms and defi
17、nitions For the purposes of this document, the following terms and definitions apply.2.1 layer component of the same composition as part of a resilient floor coveringwith a given thickness, excludingfactory finishes3 Principle The thickness of layers is measured directly by optical means. 4 Apparatu
18、s 4.1 Microscope or video microscope4.1.1 Microscope or video microscope, having a magnification of at least 40u , equipped with a micrometric scale eyepiece for the microscope or adjustable screen lines for the video microscope, readable to 0,01 mm.4.1.2 Microscope or video microscope, having a mag
19、nification of at least 40u , equipped with an eyepiecemicrometric scale readable to 0,002 5 mm used to measure a thickness below 0,05 mm. 4.2Lamp (light source), to illuminate the specimen configured so that the light falls on the specimen fromas vertical a direction as possible. 4.3 Stage micromete
20、r or video microscope, for calibrating the eyepiece micrometer. The scale shall have the smallest division equal to 0,01 mm and shall cover at least 2,54 mm for the microscope or video microscope referred to in 4.1.1, and the smallest division equal to 0,002 5 mm that covers at least 1 mm for the mi
21、croscope or video microscope referred to in 4.1.2.4.4 Holder (stage carrier), for holding the specimen without distortion, so that the cut edge isperpendicular to the optical axis of the microscope. 4.5 Sharp knife or blade, for cutting the specimen. 4.6 Straightedge or metal rule, for guiding the c
22、utting edge. BS EN ISO 24340:2012 EN ISO 24340:2012 (E)2 5 Sampling and selection of specimens 5.1 Use a fine sharp blade guided by a metal rule or straightedge and keep it perpendicular while cuttingout test pieces. It is veryimportant to cut the specimens face down on a polyamide or similar materi
23、al board toensure a clean edge. 5.2 For sheet floor covering, select five specimens (10 mm u 25 mm) evenly distributed across the width. 5.3 For tile floor covering, select one specimen (10 mm u 25 mm) from each of five separate tiles from thecarton or pack. 6 Atmosphere for conditioning and testing
24、 Condition the specimens for a minimum of 24 h at (23 r 2) C and at a relative humidity of (50 r 5) %, and testin the same environment. 7 Test procedure 7.1 Preparation Place the test piece on the mechanical stage carrier in the holding devi ce, exposing its full thickness (longedge up, the cut surf
25、ace perpendicular to the optical axis of the microscope). 7.2 Calibration Calibrate the micrometer against the stage micrometer and record the calibration factor. 7.3 Measurement Locate the specimen under the microscope and adjust the light source. Focus the microscope so that bothedges of the layer
26、 being measured are sharp. If this cannot be done, remount or re-cut the specimen. Measure the thickness by counting the rulings or the divisions on the ruled disk in the eyepiece (read themeasurement in the case of the video microscope) that cover the distance from one edge of layer to the other,an
27、d by applying the calibration factor determined in 7.2. Record this distance to the nearest graduation on themicroscope or video microscope used. Take three readings in each specimen at least 10 mm apart. Repeat the procedure on the other test specimens. 8 Calculation and expression of results Calcu
28、late the mean thickness for each layer from the number ofmeasurements taken, and express theseresults to the nearest 0,01mm or 0,002 5 mm respective to the microscope or video microscope used. 9 Precision statement An interlaboratory testwill be conducted to determine the precision of this method. B
29、S EN ISO 24340:2012 EN ISO 24340:2012 (E)310 Test report The test report shall include the following information:a) a statement that the tests were performed in accordance with this International Standard (ISO 24340:2006); b) the complete identification of each sample, including type, source, colour
30、, and manufacturers reference numbers;c) the previous history of the sample; d) anydeviation from this International Standard which mayhave affected the results;e) the thickness of the layerof the test specimen, which shall be the mean value calculated to the nearest0,01 mm or 0,002 5 mm respective
31、to the microscope or video microscope used; f) the minimum and maximum readings tothe nearest 0,01 mm or 0,002 5 mm respective to the microscopeor video microscope used. BS EN ISO 24340:2012 EN ISO 24340:2012 (E)4 Bibliography1 EN 429, Resilient floor coverings Determination of the thickness of laye
32、rs2 ASTM F 410, Standard test method for wear layer thickness of resilient floor coverings byopticalmeasurementBS EN ISO 24340:2012 EN ISO 24340:2012 (E)blankBSI is the independent national body responsible for preparing British Standards and other standards-related publications, information and ser
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