EN 120-1992
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83987CBD6C694EA6B78D827326FB15DE |
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0.45 |
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页数： |
13 |
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日期： |
2013-6-23 |
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CEN EN*L20 92 3404589 003LOb9 362 =,\,EUROPEAN STANDARD,NORME EUROPéENNE,EUROP腎SCHE NORM,EN 120:1992,July 1992,UDC 674.81 5: 620.1 : 543.242.3: 547.281 1,Supersedes EN 120:1984,Descriptors: Wooden boards, parti'cle bbards, fibre boards, plywood, chemical analysis, determination of content, gxtraction,methods, perforators,English version,Wood based panels - Determination of formaldehyde,content - Extraction. method called the perforator,method,Panneaux à base de bois - Détermination de l a,teneur en formaldéhyde - Méthode d'extraction,dite dthcde au perforateur,H o l z w e r k s t o f f e - Bestimmung des,Formaldehydgehalts - Extraùtionsverfahren,genannt Perforatorrnethode,This European Standard was approved by CEN on 1992-07-01. CEN members are bound to comply with the CEN/CENELEC Internal,Regulations which stipulate the conditions for giving t h i s European Standard the status of a national standard w i t h o u t,any alteration.,Up-to-date l i s t s and bibliographical references concerning such national standards may be obtained on application to,the Central Secretariat or to any CEN member.,The European Standards exist i n three o f f i c i a l versions (English, French, German). A version i n any other language,made by translation under the responsibility of a CEN member into i t s own language and notified to the Central,Secretariat has the same status as the o f f i c i a l versions.,CEN members are the national standards bodies of Austria, Belgium, Denmark, Finiad, France, Germany, Greece, Iceland,Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdm.,CEN,European Cornnittee for Standardization,Comité Européen de Normalisation,Europ鋓sches Kanitee für Nomng,Central Secretariat: rue de Slassart,3ó 8-1050 Emssels,o 1992 Copyright reserved to CEN members,Ref. No. EN 120:1992 E,Copyright European Committee for Standardization,Provided by IHS under license with CEN,No reproduction or networking permitted without license from IHS Not for Resale,--`,,,`,,-`-`,,`,,`,`,,`---,Page 2,EN 120:1992,-~,CEN ENJL20 92 = 3404589 003L070 U84 M,Contents l i s t,Page,scope .,Normative references .,Principle,Reagents .,Apparatus : . . ..,Test pieces .,Procedure ..,Expression o f r e s u l t s,Test report .,4,4,4,4 -,4,5,6,9,9,..-,I,Copyright European Committee for Standardization,Provided by IHS under license with CEN,No reproduction or networking permitted without license from IHS Not for Resale,--`,,,`,,-`-`,,`,,`,`,,`---,CEN EN*lIZCI 92 3404589 003L07~ T10 =,This European,(Secretariat :,(Secretariat :,Page 3,EN 120:1992,Foreword,--. -,4,Standard was prepared by Working Group 5 "Formaldehyde" .,Germany) of Technical Committee CEN/TC 112 "Wood-based panels",Germany).,This European Standard is based on the October 1984 edition. To that times,the work was the responsibility of CEN/TC 91 'Particleboards - Formaldehyde",and it was only intented for determining the formaldehyde content of,particleboards. The basis was an extraction method developed by the European,Federation of Associations of Particleboard Manufacturers, FESYP, and known,as the "Perforator Method". This method was intented for testing particularly,particleboards at the manufacturing stage, and was later adapted for testing,all wood-based panels.,For this European standard a mandate "Timber Structures" has been given to CEN,and EFTA in the framework of the Directive on the approximation of laws,regulations and administrative provisions of the Member States relating to,construction products (89/106/EEC).,National Standards identical'to this European Standard shall be published at,the latest by 93-01-31 and conflicting national standards shall be withdrawn,at the lbtest by 93-01-31.,In accordance with the Common CEN/CENELEC Rules the following countries are,bound to implement this European Standard : Austria, Belgium, Denmark,' Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg,Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United,Kingdom.,Introduction,The "perforator value" as determined by the method l a i d down i n t h i s standard i s considered to be the,"formaldehyde content" of the tested board.,The test results shall be considered i n relation to the specific board conditions a t the time of testing.,The emission of formaldehyde from wood-based panels (e.g. particleboard, plywood, fibreboard) i s a complex,process.,For a given board, the t e s t r e s u l t depends upon the age, ageing conditions, moisture content etc., at the,time of testing.,In addition, the correlation between the perforator value and the formaldehyde emission of……
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