1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 1910:2013Wood flooring and woodpanelling and cladding Determination of dimensionalstabilityCopyright European Committee for Standardization Provided by IHS under license wi
2、th CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 1910:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 1910:2013. Itsupersedes BS EN 1910:2000 which is withdrawn.The UK participation in its preparation was entrus
3、ted to TechnicalCommittee B/543, Round and sawn timber.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The Britis
4、h Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 75970 3ICS 79.060.01; 79.080; 91.180; 97.150Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy C
5、ommittee on 31 March 2013.Amendments issued since publicationDate Text affectedCopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 1910:2013EUROPEAN STANDARD NORME EUROPENNE EU
6、ROPISCHE NORM EN 1910 March 2013 ICS 79.080; 97.150 Supersedes EN 1910:2000English Version Wood flooring and wood panelling and cladding - Determination of dimensional stability Planchers en bois et lambris et bardages en bois - Dtermination de la stabilit dimensionnelle Holzfubden und Wand- und Dec
7、kenbekleidungen aus Holz - Bestimmung der Dimensionsstabilitt This European Standard was approved by CEN on 5 February 2013. 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 wi
8、thout 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 othe
9、r 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,
10、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 COMMI
11、TTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1910:2013: ECopyright European Committ
12、ee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 1910:2013EN 1910:2013 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Principle 4 5 Test equipment 4 6
13、Test specimens 5 6.1 Dimensions and shape 5 6.2 Sampling .6 6.3 Conditioning .6 7 Measurements 6 7.1 Mass 6 7.2 Dimensions of the test specimen .6 7.3 Warp 6 7.4 Moisture content 6 8 Procedure .6 8.1 Initial measurements .6 8.2 Exposure to the humid climate 6 8.3 Measurements after stabilisation in
14、the humid climate .7 8.4 Exposure to the dry climate 7 8.5 Measurements after stabilisation in the dry climate 7 8.6 Oven drying 7 9 Calculation and expression of the results of a test specimen 7 9.1 Moisture content 7 9.2 Dimensional changes 7 9.3 Warp 8 9.3.1 Cup 8 9.3.2 Spring 8 9.3.3 Bow .8 9.3.
15、4 Twist 8 10 Accuracy of the ten test specimens 8 10.1 Dimensional changes 8 10.2 Warp 9 11 Test report 9 Bibliography . 10 Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN
16、1910:2013EN 1910:2013 (E) 3 Foreword This document (EN 1910:2013) has been prepared by Technical Committee CEN/TC 175 “Round and sawn timber”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical tex
17、t or by endorsement, at the latest by September 2013, and conflicting national standards shall be withdrawn at the latest by September 2013. 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 resp
18、onsible for identifying any or all such patent rights. This document supersedes EN 1910:2000. In comparison with the previous edition, the following changes have been modified: The following clauses have been modified: 2 Normative references; 3 Terms and definitions; 4 Principle; 6.1 Dimensions and
19、shape; 6.2 Sampling; 8.3 Measurements after stabilisation in the humid climate; 8.4 Exposure to the dry climate; 9.3 Warp. According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgiu
20、m, 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, Switzerl
21、and, Turkey and the United Kingdom. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 1910:2013EN 1910:2013 (E) 4 1 Scope This European Standard specifies a method of test to
22、 determine the dimensional changes and warp of the elements of wood flooring and wood panelling and cladding. 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 edi
23、tion cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 13183-1, Moisture content of a piece of sawn timber Part 1: Determination by oven dry method EN 13183-2, Moisture content of a piece of sawn timber Part 2: Estimation by e
24、lectrical resistance method EN 13647, Wood flooring and wood panelling and cladding Determination of geometrical characteristics EN 13756:2002, Wood flooring Terminology 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 13756:2002 and the following appl
25、y. 3.1 twist deformation of the element lengthwise with a helical pattern SOURCE: EN 844-3:1995 4 Principle Measure the dimensional changes of the test specimen after initial conditioning in a standard atmosphere and again after conditioning in a specified climate. The test specimen shall be lying i
26、n horizontal position in the test chamber. Express the results as a percentage of variation of the relevant dimension measured in the initial standard climatic conditions. Record the warp and relate to the basis of measurement. 5 Test equipment 5.1 Conditioning room or enclosure The conditioning roo
27、m or enclosure shall be equipped with monitoring thermometers and hygrometers. It shall be suitable to condition the test specimen either in: climate A, defined by a relative humidity of (65 5) % and a temperature of (20 2) C, or climate B, defined by a relative humidity of (50 5) % and a temperatur
28、e of (23 2) C. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 1910:2013EN 1910:2013 (E) 5 5.2 Stabilising room or enclosure The stabilising room or enclosure shall be equi
29、pped with monitoring thermometers and hygrometers. It shall be capable of maintaining the conditions specified in Table 1: Table 1 Conditions maintained by a stabilising room or enclosure Condition No. 1 Condition No. 2 Temperaturea 20 C 23 C Relative humidityb Dry climate : 30 % 30 % Humid climate
30、: H1: or H2: 75 % 85 % 75 % 85 % aThe permitted deviation for temperature is 2 C. bThe permitted deviation for relative humidity is 5 %. It shall be possible to change from one climate to another within 24 h. 5.3 Trays The trays shall provide non-continuous support to the test specimen in the condit
31、ioning and stabilising rooms. The clearance between supports shall be sufficient not to hinder the ventilation between the test specimens. 5.4 Measuring equipment All the dimensions shall be measured as defined in EN 13647. 5.5 Scales Scales shall be accurate to 0,1 % of the masses to be measured. 5
32、.6 Oven The oven shall be able to operate at (103 2)C to bring the test specimens to the dry state. 6 Test specimens 6.1 Dimensions and shape Tests specimens are elements at the time of the first delivery. Measurements are made on the element: in case the element is more than 2 000 mm length, the el
33、ement may be reduced in length to 2 000 mm without moisture sealed ends. One moisture sealed end shall be established on elements reduced to length shorter than 2 000 mm and both ends shall be moisture sealed if elements are reduced to length shorter than 1 000 mm. The shortest length of a reduced e
34、lement is 250 mm. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 1910:2013EN 1910:2013 (E) 6 6.2 Sampling The method of installation has impact on the dimensional stabilit
35、y. Unless otherwise specified, ten test specimens selected at random shall be taken. 6.3 Conditioning Prior to exposure in the specified climate (5.2), the test specimen shall be conditioned to equilibrium either in climate A or in climate B as defined in 5.1. 7 Measurements 7.1 Mass Record the mass
36、 of each test specimen after initial conditioning (6.3) and after conditioning in the specified climate (5.2). 7.2 Dimensions of the test specimen Measure the dimensions as defined in EN 13647. 7.3 Warp Measure the warp as defined in EN 13647. The forces applied to the test specimen with the apparat
37、us shall not modify the measurements beyond the permitted deviations defined in this standard. 7.4 Moisture content If required, the moisture content of an element is measured in its initial state and after the conditioning in dry and humid climates with one of the following methods: by weighing deh
38、ydration in an oven, as specified in EN 13183-1. The moisture content is calculated according to 9.1; with an electrical device, by measuring wood resistance, as specified in EN 13183-2. 8 Procedure 8.1 Initial measurements Once the initial conditioning according to 6.3 is achieved, carry out the me
39、asurements defined in Clause 7. 8.2 Exposure to the humid climate After the initial measurements, expose the test specimen to the specified humid climate, as defined in 5.2, for 4 weeks. Achieve the correct conditions according to Table 1 within 24 h. Copyright European Committee for Standardization
40、 Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 1910:2013EN 1910:2013 (E) 7 8.3 Measurements after stabilisation in the humid climate Carry out the measurements defined in Clause 7 at least once a week and note them on r
41、eport. Achieve the correct conditions according to Table 1 within 24 h. 8.4 Exposure to the dry climate Once the measurements in 8.3 are recorded, expose the test specimen in the specified dry climate as defined in 5.2 for 4 weeks. Carry out the measurements defined in Clause 7 at least once a week
42、and note them on report. Achieve the correct conditions within 24 h. 8.5 Measurements after stabilisation in the dry climate Carry out the measurements defined in Clause 7. The duration of each conditioning period can be reduced if variation of mass does not exceed 0,1 % between two successive measu
43、rements made in any 24 h interval. 8.6 Oven drying Once the test specimen has been through all the prescribed climates, proceed to its oven drying with the oven specified in 5.6. The test specimen may be reduced to 250 mm. Oven dry state is reached if mass variation is not more than 0,1 % between tw
44、o successive measurements made in any 24 h interval. 9 Calculation and expression of the results of a test specimen 9.1 Moisture content Calculate using the following formula: =100m mms dd(1) where is the moisture content of the test specimen, after each stabilisation process, in % to three signific
45、ant figures; mdis the mass of the test specimen after oven drying, in g; msis the mass of the test specimen after each stabilisation, in g. 9.2 Dimensional changes In each direction, the cumulative relative change is calculated with the following formula: DD-Dh= didhcr)18(100 (2) Copyright European
46、Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 1910:2013EN 1910:2013 (E) 8 where dcris the cumulative relative dimensional change, in % to two significant figures; Diis the dimension after i
47、nitial stabilisation, with an accuracy of 0,01 mm; Ddis the dimension after dry conditioning, with an accuracy of 0,01 mm; Dhis the same dimension after humid conditioning, with an accuracy of 0,01 mm. h = 15 for climate H1, h = 18 for climate H2. NOTE The values for h are derived from tables giving
48、 the moisture content of solid timber in relation to temperature and relative humidity. 9.3 Warp 9.3.1 Cup Determine the absolute warp for each climate and express with an accuracy of 0,05 mm. For each climate, express the relative warp as a percentage of the actual surface width derived from the absolute averaged ones with an accuracy of 0,01 %. 9.3.2 Spring Determine the absolute warp for each climate and express with an accuracy of 0,25 mm. For each climate, express the relative warp as a percentage of the test specimen length derived from the absolut
