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1、CEN EN L20 92 3404589 003LOb9 362 EUROPEAN STANDARD NORME EUROP ENNE EUROP ISCHE 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 perf
2、orators English version Wood based panels Determination of formaldehyde content Extraction method called the perforator method Panneaux base de bois D termination de l a teneur en formald hyde M thode d extraction dite dthcde au perforateur Holzwerkstoffe Bestimmung des Formaldehydgehalts Extra tion
3、sverfahren genannt Perforatorrnethode This European Standard was approved by CEN on 1992 07 01 CEN members are bound t o comply with the CEN CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status o f a national standard w i t h o u t any alteration U
4、p to date l i s t s and bibliographical references concerning such national standards may be obtained on application t o the Central Secretariat o r to any CEN member The European Standards exist i n three official versions English French German A version i n any other language made by translation u
5、nder the responsibility of a CEN member into i t s own language and notified to the Central Secretariat has the same status as the official versions CEN members are the national standards bodies o f Austria Belgium Denmark Finiad France Germany Greece Iceland Ireland Italy Luxembourg Netherlands Nor
6、way Portugal Spain Sweden Switzerland and United Kingdm CEN European Cornnittee for Standardization Comit Europ en de Normalisation Europ isches Kanitee f r Nomng Central Secretariat rue de Slassart 3 8 1050 Emssels o 1992 Copyright reserved t o CEN members Ref No EN 120 1992 E Copyright European Co
7、mmittee for Standardization Provided by IHS under license with CEN Not for ResaleNo reproduction or networking permitted without license from IHS 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
8、 Expression of results Test report 4 4 4 4 4 5 6 9 9 I Copyright European Committee for Standardization Provided by IHS under license with CEN Not for ResaleNo reproduction or networking permitted without license from IHS CEN EN lIZCI 92 3404589 003L07 T10 This European Secretariat Secretariat Page
9、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
10、 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 particleboar
11、ds 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 re
12、lating 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 b
13、ound 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 laid down i n this standard i s co
14、nsidered t o 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
15、 test result depends upon the age ageing conditions moisture content etc a t the time of testing I n addition the correlation between the perforator value and the formaldehyde emission of the board depends on the type of board Copyright European Committee for Standardization Provided by IHS under li
16、cense with CEN Not for ResaleNo reproduction or networking permitted without license from IHS CEN EN l120 92 0 3404589 0033072 957 Page 4 EN 120 1992 1 Scope This European Standard specifies an extraction method known as the Perforator Method It is used for the determination of the formaldehyde content of unlaminated and uncoated wood based panels 2 Normative references This European Standard incorporates by dated or undated reference provision from other publications These normative references
