BS EN 635-5-1999 Plywood -Classification by surface appearance Part 5 Methods for measuring and expressing characteristics and defects.pdf
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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 635-5:1999 The Euro
2、pean Standard EN 635-5:1999 has the status of a British Standard ICS 79.060.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Plywood Classification by surface appearance Part 5: Methods for measuring and expressing characteristics and defects This British Standard, having be
3、en prepared under the direction of the Sector Committee for Building and Civil Engineering, was published under the authority of the Standards Committee and comes into effect on 15 August 1999 BSI 08-1999 ISBN 0 580 32361 7 BS EN 635-5:1999 Amendments issued since publication Amd. No.DateComments Na
4、tional foreword This British Standard is the English language version of EN 635-5:1999. The UK participation in its preparation was entrusted to Technical Committee B/541, Wood-based panels, which has the responsibility to: aid enquirers to understand the text; present to the responsible European co
5、mmittee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-re
6、ferences The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International Standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalo
7、gue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document compr
8、ises a front cover, an inside front cover, the EN title page, pages 2 to 6, an inside back cover and a back cover. The BSI copyright notice displayed throughout this document indicates when the document was last issued. CEN European Committee for Standardization Comite Europe en de Normalisation Eur
9、opa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1999 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 635-5:1999 E EUROPEAN STANDARDEN 635-5 NORME EUROPE ENNE EUROPA ISCHE NORM March 1999 ICS
10、 79.060.10 English version Plywood Classification by surface appearance Part5: Methods for measuring and expressing characteristics and defects Contreplaque Classification selon laspect des faces Partie 5: Me thodes de mesure et dexpression des caracte ristiques et des de fauts Sperrholz Klassifizie
11、rung nach dem Aussehen der Oberfla che Teil 5: Meverfahren und Angabe der Merkmale und Fehler This European Standard was approved by CEN on 3 March 1999. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the sta
12、tus 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 Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A
13、version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland,
14、France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Page 2 EN 635-5:1999 BSI 08-1999 Foreword This European Standard has been prepared by Technical Committee CEN/TC 112, Wood-based panels, the Secretariat of whic
15、h 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 1999, and conflicting national standards shall be withdrawn at the latest by September 1999. According to the CEN/CENELE
16、C Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switz
17、erland and the United Kingdom. This standard is one of a series of standards for the classification of plywood by surface appearance. Contents Page Foreword2 1Scope3 2Normative references3 3Definitions3 4Measurements3 5Apparatus4 6Method for measurement4 7Test report6 Annex A (informative) Bibliogra
18、phy6 Page 3 EN 635-5:1999 BSI 08-1999 Table 1 Measurements required to classify the characteristics inherent in wood of plywood surfaces Category of characteristicsReference EN 635-2:1995 EN 635-3:1995 NumberSize DiameterLengthWidthArea Pin knots3.2.1.1X Sound intergrown knots3.2.1.2XX Unsound or no
19、n-adhering knots and knots holes3.2.1.3XX Open splits3.2.1.4XXX Abnormalities due to insects and marine borers3.2.1.5XXXX Resin pockets and inbark3.2.1.6X Irregularities in the structure of the wood, e.g. roughness3.2.1.7X Discolouration which is not wood destroying3.2.1.8X 1 Scope This European Sta
20、ndard specifies the methods for measuring and expressing: some inherent characteristics of wood; and some defects that come from the manufacturing process which are used for the classification of the appearance of plywood surfaces according to EN 635-1, EN 635-2 and EN 635-3. 2 Normative references
21、This European Standard incorporates, by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these pu
22、blications apply to this European Standard only when incorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies. EN 313-2, Plywood Classification and terminology Part 2: Terminology. EN 326-1, Wood-based panels Sampling, cutting and
23、 inspection Part 1: Sampling and cutting of test pieces and expression of test results. EN 635-1, Plywood Classification by surface appearance Part 1: General. EN 635-2, Plywood Classification by surface appearance Part 2: Hardwood. EN 635-3, Plywood Classification by surface appearance Part 3: Soft
24、wood. 3 Definitions For the purposes of this standard the definitions of EN 313-2 and EN 635-1 apply. 4 Measurements For the purpose of determining the appearance class of plywood according to EN 635-1, EN 635-2 and EN 635-3, the following characteristics inherent in wood (see Table 1) and manufactu
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