1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 325:2012Wood-based panels Determination of dimensionsof test piecesBS EN 325:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 325:
2、2012. Itsupersedes BS EN 325:1993 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee B/541, Wood based panels.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all
3、the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012ISBN 978 0 580 72859 4ICS 79.060.01Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Stand
4、ard was published under the authority of theStandards Policy and Strategy Committee on 31 May 2012.Amendments issued since publicationDate Text affectedBS EN 325:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 325 March 2012 ICS 79.060.01 Supersedes EN 325:1993English Version Wood-based pan
5、els - Determination of dimensions of test pieces Panneaux base de bois - Dtermination des dimensions des prouvettes Holzwerkstoffe - Bestimmung der Mae der Prfkrper This European Standard was approved by CEN on 11 February 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulatio
6、ns 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. T
7、his 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 me
8、mbers 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, Romania, Slovakia, Slovenia, Spai
9、n, 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 exploitation in any form and by any means reserved worldwide for CEN nat
10、ional Members. Ref. No. EN 325:2012: EBS EN 325:2012EN 325:2012 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Principles 44 Apparatus .44.1 Instrument for thickness measurement 44.2 Instrument for length and width measurement 45 Test pieces .45.1 Sampling and cutting 45.2 Dimensio
11、ns .45.3 Conditioning .46 Procedure .56.1 Measuring points .56.2 Thickness measurement .56.3 Length and width measurement .57 Test report 5Bibliography 6BS EN 325:2012EN 325:2012 (E) 3 Foreword This document (EN 325:2012) has been prepared by Technical Committee CEN/TC 112 “Wood-based panels”, the s
12、ecretariat of which is held by DIN. 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 2012, and conflicting national standards shall be withdrawn at the latest by September 2012. Attention
13、 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 rights. This document supersedes EN 325:1993. Compared to EN 325:1993 the following modifications have
14、been made: a) for thickness measurement in 4.1 measuring surface diameter changed from (16 1) mm to 15 mm to 20 mm; b) for length and width measurement in 4.2 minimum measuring surface width changed from 5 mm to 3 mm. According to the CEN/CENELEC Internal Regulations, the national standards organiza
15、tions 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, Portug
16、al, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 325:2012EN 325:2012 (E) 4 1 Scope This European Standard specifies a method for measuring the thickness, length and width of test pieces of wood-based panels. 2 Normative references The following docume
17、nts, 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. EN 326-1, Wood-based panels
18、 Sampling, cutting and inspection Part 1: Sampling and cutting of test pieces and expression of test results 3 Principles The length and width of test pieces are determined by linear measurement. 4 Apparatus 4.1 Instrument for thickness measurement Micrometer, or similar measuring instrument, having
19、 flat and parallel circular measuring surfaces of 15 mm to 20 mm diameter and an operation force of (4 1) N. The graduation of the apparatus shall allow a reading to 0,01 mm. 4.2 Instrument for length and width measurement Sliding calliper, or any other instrument with measuring surfaces of at least
20、 3 mm width, graduated to allow a reading to 0,1 mm. 5 Test pieces 5.1 Sampling and cutting Carry out the sampling and cutting in accordance with EN 326-1. 5.2 Dimensions The dimensions of the test pieces shall be in accordance with those specified in the relevant test method. 5.3 Conditioning The t
21、est pieces shall be conditioned to constant mass in an atmosphere with a relative humidity of (65 5) % and a temperature of (20 2) C. Constant mass is considered to be reached when the results of two successive weighing operations, carried out at an interval of 24 h, do not differ by more than 0,1 %
22、 of the mass of the test piece. BS EN 325:2012EN 325:2012 (E) 5 6 Procedure 6.1 Measuring points The number and positions of the measuring points shall be in accordance with the relevant European Standard for test methods. 6.2 Thickness measurement Apply the measuring surfaces of the instrument slow
23、ly to the test piece. Measure the thickness to 0,01 mm. 6.3 Length and width measurement For measuring the length and width, apply the jaw of the sliding calliper slowly and without excessive pressure to the test piece, at an angle of approximately 45 to the plane of the test piece (see Figure 1). F
24、igure 1 Inclination of sliding calliper to plane of test piece Measure the length and width to 0,1 mm. 7 Test report As described in EN 326-1. BS EN 325:2012EN 325:2012 (E) 6 Bibliography ISO 9424:2003, Wood-based panels Determination of dimensions of test pieces This page deliberately left blankBSI
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