Wood based panels - Determination of dimensional changes associated with changes in relative humidity

This European Standard specifies a method for the determination of dimensional changes in wood-based panels, due to changes in the relative humidity of the air.

Holzwerkstoffe - Bestimmung von Maßänderungen in Verbindung mit Änderungen der relativen Luftfeuchte

Diese Europäische Norm legt ein Verfahren zur Bestimmung von Maßänderungen bei Holzwerkstoffen auf Grund von Änderungen der relativen Luftfeuchte fest.

Panneaux à base de bois - Détermination des variations dimensionnelles sous l'influence de variations de l'humidité relative

La présente norme européenne prescrit une méthode pour déterminer les variations dimensionnelles des panneaux à base de bois dues aux variations de l'humidité relative dans l'air.

Lesne plošče – Ugotavljanje dimenzijskih sprememb povezanih s spremembami relativne zračne vlažnosti

General Information

Status
Published
Publication Date
19-Mar-2002
Current Stage
9093 - Decision to confirm - Review Enquiry
Completion Date
06-Dec-2017

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Standard
EN 318:2004
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Wood based panels - Determination of dimensional changes associated with changes in relative humidityHPHPEDPLPanneaux a base de bois - Détermination des variations dimensionnelles sous l'influence de variations de l'humidité relativeHolzwerkstoffe - Bestimmung von Maßänderungen in Verbindung mit Änderungen der relativen Luftfeuchte79.060.01Wood-based panels in generalICS:SIST EN 318:2004enTa slovenski standard je istoveten z:EN 318:200201-januar-2004SIST EN 318:2004SLOVENSKI

STANDARDSIST EN 318:19961DGRPHãþD

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 318March 2002ICS 79.060.01Supersedes EN 318:1993English versionWood based panels - Determination of dimensional changesassociated with changes in relative humidityPanneaux à base de bois - Détermination des variationsdimensionnelles sous l'influence de variations de l'humiditérelativeHolzwerkstoffe - Bestimmung von Maßänderungen inVerbindung mit Änderungen der relativen LuftfeuchteThis European Standard was approved by CEN on 24 February 2002.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36

B-1050 Brussels© 2002 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 318:2002 E

EN 318:2002 (E)2ContentspageForeword......................................................................................................................................................................31Scope..............................................................................................................................................................42Normative references....................................................................................................................................43Principle..........................................................................................................................................................44Apparatus.......................................................................................................................................................44.1Balance...........................................................................................................................................................44.2Measuring instruments for length and thickness.......................................................................................44.3Calibration bar................................................................................................................................................44.4Climate chamber............................................................................................................................................44.5Drying cabinet................................................................................................................................................54.6Hygrometer.....................................................................................................................................................54.7Thermometer..................................................................................................................................................55Test pieces......................................................................................................................................................56Procedure.......................................................................................................................................................56.1Test piece preparation...................................................................................................................................56.1.1General............................................................................................................................................................56.1.2Thickness measuring points........................................................................................................................56.1.3Length measuring points..............................................................................................................................56.2Conditioning...................................................................................................................................................66.3Measurements................................................................................................................................................66.4Drying..............................................................................................................................................................77Expression of results....................................................................................................................................77.1Moisture content............................................................................................................................................77.2Change in length............................................................................................................................................77.3Change in thickness......................................................................................................................................77.4Panel results...................................................................................................................................................88Test report......................................................................................................................................................8

EN 318:2002 (E)3ForewordThis document (EN 318:2002) has been prepared by Technical Committee CEN/TC 112 "Wood-based panels", thesecretariat 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 orby endorsement, at the latest by September 2002, and conflicting national standards shall be withdrawn at the lat-est by September 2002.This document supersedes EN 318:1993.Compared to the version EN 318:1993 the following modifications have been made:a)The scope has been extended from fibre boards to wood-based panelsb)The conditioning procedure has been modifiedAccording to the CEN/CENELEC Internal Regulations, the national standards organizations of the following coun-tries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Swe-den, Switzerland and the United Kingdom.

EN 318:2002 (E)41 ScopeThis European Standard specifies a method for the determination of dimensional changes in wood-based panels,due to changes in the relative humidity of the air.2 Normative referencesThis European Standard incorporates by da

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