SIST EN 318:2004
(Main)Wood based panels - Determination of dimensional changes associated with changes in relative humidity
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 a 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
- 31-Dec-2003
- Technical Committee
- LLZ - Les, lesni izdelki in zaščita lesa
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Jan-2004
- Due Date
- 01-Jan-2004
- Completion Date
- 01-Jan-2004
- Directive
- 89/106/EEC - Construction products
Relations
- Effective Date
- 01-Jan-2004
Overview
SIST EN 318:2004 is a European Standard developed by CEN that establishes a method for determining dimensional changes in wood-based panels caused by variations in relative humidity. This standard is essential for manufacturers, quality control laboratories, and researchers working with wood-based panel products such as particle boards, fiberboards, and plywood. It provides a comprehensive procedure to measure length and thickness changes, which directly relate to panel performance, durability, and suitability for various applications in fluctuating environmental conditions.
Key Topics
- Scope: SIST EN 318:2004 covers the method for assessing how wood-based panels respond dimensionally to changes in air relative humidity. This includes measuring dimensional changes in both adsorption and desorption processes and quantifying hysteresis effects.
- Test Specimen Preparation: Specific dimensions for test pieces are defined (typically 300 mm × 50 mm × panel thickness), including detailed instructions on marking measuring points and reference systems for accurate and repeatable length and thickness measurements.
- Conditioning Procedure: The standard prescribes conditioning test pieces at specific temperatures and relative humidity levels (20 °C with 30%, 65%, and 85% relative humidity) to ensure constant mass prior to measurements. Two sets of test pieces are conditioned separately for adsorption and desorption studies.
- Measurement and Equipment: Instruments with high precision (+/- 0.01 mm accuracy) including balances, length gauges, climate chambers, hygrometers, and thermometers are specified. Calibration and measurement procedures ensure repeatable and reliable data.
- Calculation of Dimensional Changes: Provides formulas to calculate relative changes in length and thickness expressed as millimeters per meter for length and percentage for thickness. Results account for the influence of markings and are averaged across multiple measuring points.
- Reporting: The procedure requires detailed documentation of moisture content, dimensional changes, and test setup in alignment with EN 326-1 to ensure traceability and comparability of results.
Applications
- Quality Control for Wood-Based Panels: Ensures that panel manufacturers can monitor the dimensional stability of their products under varying humidity, critical for maintaining product specifications and performance standards.
- Material Development and Testing: Supports material scientists and engineers in assessing new panel compositions and surface treatments to improve resistance to humidity-induced deformation.
- Design and Specification: Assists architects, engineers, and product designers in selecting appropriate wood-based panels for environments with fluctuating moisture conditions, such as indoor furniture, flooring, and structural applications.
- Compliance and Certification: Facilitates compliance with European regulations and customer requirements by providing standardized testing methods accepted across EU member countries.
Related Standards
- EN 322: Wood-based panels - Determination of moisture content - Provides the reference method for measuring moisture content essential for interpreting dimensional changes measured according to EN 318.
- EN 326-1: Wood-based panels - Sampling, cutting and inspection - Part 1: Sampling and cutting of test pieces and expression of test results - Defines the sampling framework and reporting structure consistent with EN 318.
- EN 312: Particleboards - Specifications - Often used in conjunction with EN 318 to assess product performance and compliance.
- EN 13986: Wood-based panels for use in construction - Characteristics, evaluation of conformity and marking - Specifies requirements where dimensional stability under humidity changes is a key factor.
By adhering to SIST EN 318:2004, stakeholders in the wood panel industry can reliably evaluate and document the behavior of wood-based panels under varying humidity, improving product quality, reliability, and user confidence in diverse applications.
Frequently Asked Questions
SIST EN 318:2004 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Wood based panels - Determination of dimensional changes associated with changes in relative humidity". This standard covers: 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.
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.
SIST EN 318:2004 is classified under the following ICS (International Classification for Standards) categories: 79.060.01 - Wood-based panels in general. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 318:2004 has the following relationships with other standards: It is inter standard links to SIST EN 318:1996. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 318:2004 is associated with the following European legislation: EU Directives/Regulations: 305/2011, 89/106/EEC. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
SIST EN 318:2004 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
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
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