EN 717-1:2004

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.RãþDQMHHolzwerkstoffe - Bestimmung der Formaldehydabgabe - Teil 1: Formaldehydabgabe nach der Prüfkammer-MethodePanneaux a base de bois - Détermination du dégagement de formaldéhyde - Partie 1 : Emission de for-maldéhyde par la méthode a la chambreWood-based panels - Determination of formaldehyde release - Part 1: Formaldehyde emission by the chamber method79.060.01Wood-based panels in generalICS:Ta slovenski standard je istoveten z:EN 717-1:2004SIST EN 717-1:2005en01-januar-2005SIST EN 717-1:2005SLOVENSKI
STANDARDSIST ENV 717-1:20001DGRPHãþD

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 717-1October 2004ICS 79.060.01Supersedes ENV 717-1:1998
English versionWood-based panels - Determination of formaldehyde release -Part 1: Formaldehyde emission by the chamber methodPanneaux à base de bois - Détermination du dégagementde formaldéhyde - Partie 1 : Emission de for-maldéhydepar la méthode à la chambreHolzwerkstoffe - Bestimmung der Formaldehydabgabe -Teil 1: Formaldehydabgabe nach der Prüfkammer-MethodeThis European Standard was approved by CEN on 16 August 2004.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 Central Secretariat 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 Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 717-1:2004: ESIST EN 717-1:2005

Test chambers.17 Annex B (normative)
Determination of air exchange rate.24 Annex C (normative)
Determination of the steady-state emission value.26 Annex D (informative)
Analytical procedure for the fluorimetric determination of formaldehyde
content.29 Bibliography.31
results, it is recommended to participate in a round-robin test for calibration at least once a year. SIST EN 717-1:2005

panels. 2 Normative references The following referenced documents are indispensable for the application of this document. 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 — Sampling, cutting and inspection — Part 1: Sampling and cutting of test pieces and expression of test results. 3 Terms and definitions For the purposes of this European Standard, the following terms and definitions apply. 3.1 volume of the chamber total air volume of the unloaded chamber, including recirculating ventilation ducts, expressed in cubic metres (m3) 3.2 loading factor ratio of the total surface area of the test piece, excluding the area of the edges, to the volume of the chamber, ex-pressed in square metres per cubic metre (m2/m3) 3.3 air exchange rate quotient of air volume passing through the chamber per hour (m3/h) and the chamber volume (m3) 3.4 air velocity velocity of the air near the surface of test pieces in the chamber in metres per second (m/s) 3.5 steady-state state when the formaldehyde emission of the wood-based panels is quasi constant under the test conditions, this means that the formaldehyde concentration in the chamber remains constant NOTE In practice, a true steady-state is not achievable because formaldehyde is emitted irreversibly. This standard defines a steady-state condition for the purpose of the test (see Clause 10). SIST EN 717-1:2005

1 ppm (parts per million) = 1,24 mg/m3
1 mg/m³ = 0,81 ppm (parts per million) 4 Principle Test pieces of known surface area, are placed in a chamber, in which the temperature, relative humidity, air velo-city and exchange rate are controlled at defined values. Formaldehyde emitted from the test pieces mixes with the air in the chamber. The air in the chamber is sampled periodically. The formaldehyde concentration is determined by drawing air from the chamber through gas washing bottles containing water, which absorbs the formaldehyde. The formaldehyde concentration in the water is determined. The concentration of formaldehyde in the chamber at-mosphere is calculated from the concentration in the water in the gas washing bottles and the volume of the sam-pled air. It is expressed in milligrams per cubic metre (mg/m3). Sampling is periodically continued until the formal-dehyde concentration in the chamber has reached a steady-state. NOTE The influences of temperature, relative humidity, loading factor and air exchange rate on the formaldehyde concen-tration in the chamber atmosphere can be described by formulas (e.g. Andersen formula). An interrelation between the structure of the test pieces, especi
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