SIST EN 321:2004
(Main)Wood-based panels - Determination of moisture resistance under cyclic test conditions
Wood-based panels - Determination of moisture resistance under cyclic test conditions
This European Standard specifies a test method for the determination of the moisture resistance of wood-based
panels under cyclic test conditions.
Holzwerkstoffe - Bestimmung der Feuchtebeständigkeit durch Zyklustest
Diese Europäische Norm legt ein Prüfverfahren zur Bestimmung der Feuchtebeständigkeit von Holzwerkstoffen durch Zyklusprüfung fest.
Panneaux a base de bois - Détermination de la résistance a l'humidité selon essais cycliques
La présente Norme européenne spécifie une méthode pour la détermination de la résistance à l'humidité des panneaux à base sous conditions essais cycliques.
Lesne plošče – Ugotavljanje odpornosti proti vlagi pri cikličnih pogojih
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
- Effective Date
- 01-Jan-2004
- Effective Date
- 27-Dec-2023
Overview
SIST EN 321:2004 is a European Standard developed by CEN that specifies a standardized test method for determining the moisture resistance of wood-based panels under cyclic test conditions. This standard ensures accurate assessment of how wood-based panels behave when subjected to repeated cycles of moisture exposure, freezing, and drying, mimicking real-life environmental conditions. It is essential for manufacturers, quality controllers, and researchers involved in wood panel production and durability assessment.
The standard applies to all types of wood-based panels and supersedes the previous version EN 321:1993. Developed under the CEN/TC 112 technical committee, it has been harmonized across CEN member countries, enabling uniform testing and reliable comparison of product performance.
Key Topics
Scope of Testing
Defines procedures for testing moisture resistance through cyclic exposure to water immersion, freezing, and drying, followed by measurements of thickness swelling and residual mechanical strength.Test Methodology
Involves three repeated cycles, each including:- Immersion in water (pH 7 ± 1, 20 ± 1 °C) for 70 hours
- Freezing between -12 °C and -25 °C for 24 hours
- Drying at 70 ± 2 °C with forced ventilation for 70 hours
After cycles, test pieces are reconditioned and evaluated for changes in thickness and mechanical strength.
Apparatus Requirements
Includes specifications for water bath, freezing cabinet, and drying cabinet ensuring controlled and reproducible test conditions.Sampling and Conditioning
Specifies sampling, cutting, and pre-conditioning procedures to achieve constant mass before testing, adhering to related EN standards (EN 326-1, EN 310).Evaluation Parameters
Key results measured are swelling in thickness (EN 317), tensile strength perpendicular to the panel surface (EN 319), and optionally bending strength (EN 310).Reporting
Formal requirements for documenting test procedures, results, and test piece characteristics as per EN 326-1.
Applications
The SIST EN 321:2004 standard is highly relevant for:
Wood-Based Panel Manufacturers
Ensuring product durability and compliance with moisture resistance requirements for different applications such as furniture, construction, and packaging.Quality Assurance Laboratories
Performing standardized cyclic moisture resistance testing to validate product quality and conformity with European regulations.Research and Development
Investigating material improvements to enhance durability against moisture-related degradation, freezing damage, and subsequent mechanical property loss.Regulatory and Certification Bodies
Using EN 321 test results to establish product classifications, load-bearing capacity in humid environments, and provide certifications aligned with harmonized European standards.
Related Standards
SIST EN 321:2004 is part of a comprehensive framework of European standards covering various performance aspects of wood-based panels:
- EN 310 – Determination of modulus of elasticity and bending strength
- EN 317 – Measurement of swelling in thickness after water immersion
- EN 319 – Tensile strength perpendicular to board plane testing
- EN 325 – Dimension measurement of test pieces
- EN 326-1 – Sampling and test piece preparation guidelines
- EN 300 – Definitions and specifications for Oriented Strand Boards (OSB)
- EN 312-5 and EN 312-7 – Particleboard specifications for humid conditions
- EN 622-5 – Medium Density Fibreboard (MDF) specifications for dry processes
- EN 634-2 – Cement bonded particleboards for variable moisture conditions
These interconnected standards support a rigorous evaluation environment for manufacturers, helping define the durability profile of wood-based panels used in different environmental conditions.
Keywords: SIST EN 321:2004, wood-based panels, moisture resistance, cyclic test conditions, European standard, wood panel testing, moisture durability, water immersion, freezing test, drying test, swelling in thickness, tensile strength, bending strength, CEN standards, wood panel quality control.
Frequently Asked Questions
SIST EN 321:2004 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Wood-based panels - Determination of moisture resistance under cyclic test conditions". This standard covers: This European Standard specifies a test method for the determination of the moisture resistance of wood-based panels under cyclic test conditions.
This European Standard specifies a test method for the determination of the moisture resistance of wood-based panels under cyclic test conditions.
SIST EN 321:2004 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 321:2004 has the following relationships with other standards: It is inter standard links to SIST EN 321:1996, SIST EN 321:1996/AC:1998, kSIST FprEN 321:2025. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 321:2004 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.
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Wood-based panels - Determination of moisture resistance under cyclic test conditionsSRJRMLKPanneaux a base de bois - Détermination de la résistance a l'humidité selon essais cycliquesHolzwerkstoffe - Bestimmung der Feuchtebeständigkeit durch Zyklustest79.060.01Wood-based panels in generalICS:SIST EN 321:2004enTa slovenski standard je istoveten z:EN 321:200101-januar-2004SIST EN 321:2004SLOVENSKI
STANDARDSIST EN 321:1996/AC:1998SIST EN 321:19961DGRPHãþD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 321November 2001ICS 79.060.01Supersedes EN 321:1993English versionWood-based panels - Determination of moisture resistanceunder cyclic test conditionsPanneaux à base de bois - Détermination de la résistanceà l'humidité selon essais cycliquesHolzwerkstoffe - Bestimmung der Feuchtebeständigkeitdurch ZyklustestThis European Standard was approved by CEN on 30 September 2001.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, 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© 2001 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 321:2001 E
ScopeThis European Standard specifies a test method for the determination of the moisture resistance of wood-basedpanels under cyclic test conditions.2
Normative referencesThis European Standard incorporates, by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text, and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references, the latest edition of thepublication referred to applies (including amendments).EN 310,
Wood based panels — Determination of modulus of elasticity in bending and of bending strength.EN 317,
Particleboards and fibreboards — Determination of swelling in thickness after immersion in water.EN 319,
Particleboards and fibreboards — Determination of tensile strength perpendicular to the plane of the board.EN 325,
Wood based panels — Determination of dimensions of test pieces.EN 326-1,
Wood based panels — Sampling, cutting and inspection — Part 1: Sampling and cutting of test piecesand expression of test results.3
PrincipleTest pieces are exposed to three cycles, each comprising immersion in water, freezing, and drying at elevatedtemperature. After cyclic treatment, the test pieces are then reconditioned and their swelling in thickness andresidual strength determined.4
Apparatus4.1
Water bathA water bath which shall maintain water at a temperature of (20 ± 1) °C.4.2 Freezing cabinetA freezing cabinet which shall be capable of maintaining a temperature of between - 12 °C and - 25 °C. It shall alsobe capable of regaining this temperature within 1 h after inserting the test pieces.4.3
Drying cabinetA laboratory drying cabinet with forced, evenly distributed air ventilation, which shall maintain a temperature of(70 ± 2) °C and have (25 ± 5) air exchanges per hour. It shall be capable of reaching a temperature of (70 ± 2) °Cwithin 2 h after inserting the test pieces.4
Test pieces5.1 SamplingSampling and cutting of the test pieces shall be carried out according to EN 326-1 and the relevant materialspecification standard.5.2 Dimensions of test piecesDimensions shall be in accordance with EN 310, EN 317 and EN 319 as appropriate.5.3
ConditioningThe test pieces shall be conditioned to constant mass in an atmosphere with a relative humidity of (65 ± 5) % anda temperature of (20 ± 2) °C. Constant mass is considered to be reached when the results of two successiveweighing operations, carried out at an interval of 24 h, do not differ by more than 0,1 % of the mass of each testpiece.6 Procedure6.1 Treatment of the test piecesThe following sequence of operations shall be carri
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SIST EN 321:2004は、木質パネルの耐水性を評価するための試験方法を定めたヨーロッパの標準規格です。この標準の適用範囲は、木質パネルがサイクルテスト条件下でどのように湿気に耐えるかを測定することに特化しており、木質パネルの品質管理や性能評価における重要な指針となっています。 この規格の強みは、その明確な試験手順と条件にあります。試験は反復的な湿気および乾燥のサイクルを通じて行われ、実際の使用環境を模しているため、木質パネルの実用的な湿気耐性を正確に評価することが可能です。また、異なる種類の木質パネル間での比較を行うための標準化された方法を提供することで、業界全体の製品信頼性向上に寄与します。 SIST EN 321:2004は、製造者や品質管理担当者にとって特に重要であり、この標準を遵守することにより、製品の競争力を高め、顧客からの信頼を獲得する助けになります。この標準は、木質パネル業界における重要な文書であり、湿気に対する耐性を評価し、製品の耐久性を向上させるための基盤となるものです。全体的に見て、SIST EN 321:2004は木質パネルの選定と利用において不可欠な役割を果たしています。
La norme SIST EN 321:2004 se concentre sur la détermination de la résistance à l'humidité des panneaux à base de bois dans des conditions d'essai cycliques. Son champ d'application est primordial, car il répond aux besoins croissants d'évaluation de la durabilité des matériaux utilisés dans l'industrie du bois. L'un des points forts de cette norme est sa méthodologie rigoureuse qui garantit des résultats fiables et reproductibles. En spécifiant des conditions d'essai cycliques, la norme permet d'évaluer la performance des panneaux en situations réelles d'exposition à l'humidité, ce qui est essentiel pour les fabricants et les utilisateurs finaux. De plus, la norme fournit un cadre standardisé qui facilite la comparaison entre différents produits et contribue à la qualité globale des matériaux sur le marché. La pertinence de la SIST EN 321:2004 est également manifeste dans son alignement avec les préoccupations environnementales et de durabilité. En assurant que les panneaux à base de bois répondent à des critères de résistance à l'humidité, elle aide à promouvoir des produits conformes aux exigences modernes en termes de durabilité et de performance. En résumé, la norme SIST EN 321:2004 est une référence incontournable pour tout acteur de l'industrie du bois, garantissant des tests pertinents et fiables sur la résistance à l'humidité des panneaux à base de bois.
Die SIST EN 321:2004 ist ein richtungsweisendes Dokument, das eine Testmethode für die Bestimmung der Feuchtigkeitsbeständigkeit von Holzwerkstoffen unter zyklischen Testbedingungen festlegt. Dieses Dokument ist von großer Relevanz für die Holzindustrie und die Holzwerkstofftechnik, da es die Qualität und Langlebigkeit von Holzwerkstoffen in wechselnden Klimabedingungen bewertet. Die Stärke der SIST EN 321:2004 liegt in ihrer umfassenden Methodik, die es ermöglicht, die Feuchtigkeitsaufnahme und -abgabe von Holzwerkstoffen präzise zu messen. Dies ist besonders wichtig für die Entwicklung von Produkten, die sowohl Innen- als auch Außenanwendungen betreffen, wo sie unterschiedlichen Umweltbedingungen ausgesetzt sind. Die Standardisierung ermöglicht eine einheitliche Bewertung und sorgt somit für Transparenz und Vergleichbarkeit zwischen verschiedenen Herstellern und Produkten. Ein weiterer Vorteil dieser Norm ist die praktische Anwendbarkeit im Produktionsprozess. Die zyklischen Testbedingungen simulieren reale Umgebungen, was die Relevanz der Testergebnisse für die Industrie erhöht. Hersteller können somit nicht nur die Qualität ihrer Materialien überprüfen, sondern auch gezielt optimieren, um den Anforderungen des Marktes gerecht zu werden. Die SIST EN 321:2004 ist somit ein unverzichtbares Dokument für die Gewährleistung der Produktqualität in der Holzwerkstoffbranche und bietet eine solide Grundlage für die Forschung und Entwicklung moderner Holzprodukte mit optimierter Feuchtigkeitsbeständigkeit.
SIST EN 321:2004는 목재 기반 패널의 수분 저항성을 사이클 테스트 조건 하에서 측정하기 위한 시험 방법을 규정하고 있습니다. 이 표준의 범위는 특히 목재 기반 패널이 다양한 환경적 요소에 노출될 때 어떻게 작용하는지를 이해하는 데 필수적입니다. 이는 건축 및 가구 산업에서의 응용에 있어 중요한 기준이 됩니다. 이 표준의 강점은 그 체계적이고 명확한 테스트 절차에 있습니다. 사용자들은 정해진 프로토콜에 따라 동일한 조건에서 실험을 수행함으로써, 목재 패널의 수분 저항성을 객관적으로 비교할 수 있습니다. 이러한 표준화된 테스트 방법은 제품의 품질을 확보하고, 시장에서의 신뢰성을 높이는 데 기여합니다. 또한, SIST EN 321:2004는 현대의 다양한 기후 조건에 적합하게 설계되어 있어, 실제 사용 환경에서의 성능 예측에 매우 유용한 지침을 제공합니다. 이는 제조업체가 소비자에게 더 나은 제품을 제공하는 데 중요한 역할을 하고, 궁극적으로는 지속 가능한 건축 자재의 개발을 촉진하는 데 기여합니다. 결론적으로, SIST EN 321:2004는 목재 기반 패널의 수분 저항성을 평가하기 위한 필수적인 지침서로, 목재 제품의 품질 관리 및 개발에 있어 중요한 기준을 제공합니다.
The SIST EN 321:2004 standard is a pivotal document in the field of wood-based panels, specifically focusing on the determination of moisture resistance under cyclic test conditions. Its primary scope is to provide a reliable test method that evaluates the durability and performance of wood-based panels when exposed to varying moisture levels, reflecting real-world conditions. One of the key strengths of this standard is its comprehensive methodology, which encompasses cyclical exposure that mimics the environmental challenges wood-based panels face in practical applications. This rigorous approach ensures that manufacturers and researchers can accurately assess the moisture resistance of their products, leading to enhanced quality control and product development. Moreover, the relevance of SIST EN 321:2004 extends beyond mere compliance with testing protocols; it serves as a critical resource for manufacturers seeking to improve their product offerings in terms of longevity and performance. By adhering to the standard, companies can better meet consumer expectations and regulatory requirements, fostering confidence in the use of wood-based panels in construction and other industries. The document also provides a framework for comparing different products within the wood-based panel category, thus supporting innovation and competitiveness in the market. With the increasing demand for sustainable building materials, the moisture resistance capabilities defined within SIST EN 321:2004 enhance the appeal of wood-based products as both practical and eco-friendly options. In summary, the SIST EN 321:2004 standard is an essential reference for assessing the moisture resistance of wood-based panels, offering a robust testing methodology that is both relevant and instrumental for industry stakeholders. Its emphasis on cyclic test conditions further solidifies its importance in ensuring that wood-based panels can withstand the rigors of their intended environment.
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