SIST EN 73:2020+A1:2024

Durability of wood and wood-based products - Accelerated ageing of treated wood prior to biological testing - Evaporative ageing procedure

This document specifies an evaporative ageing procedure, applicable to test specimens of wood and wood-based products which are subsequently subjected to biological tests.
NOTE   The method can also be used for pre-conditioning of untreated wood, modified wood and wood-based panel products, whether they received preservative treatment or not.

Dauerhaftigkeit von Holz und Holzprodukten - Beschleunigte Alterung von behandeltem Holz vor biologischen Prüfungen - Verdunstungsbeanspruchung

Dieses Dokument legt ein Verfahren zur Verdunstungsbeanspruchung fest, das für Prüfkörper aus Holz oder Holzprodukten anwendbar ist, die anschließend biologischen Prüfungen unterzogen werden.
ANMERKUNG   Dieses Verfahren kann auch zur Vorbehandlung von unbehandeltem Holz, modifiziertem Holz und Holzwerkstoff-Produkten mit oder ohne Zusatz von Holzschutzmitteln verwendet werden.

Durabilité du bois et des produits dérivés - Épreuves de vieillissement accéléré des bois traités avant essais biologiques - Épreuve d'évaporation

Trajnost lesa in lesnih proizvodov - Pospešeno staranje zaščitenega lesa pred biološkim preskušanjem - Postopek izparevanja (vključno z dopolnilom A1)

Ta dokument določa postopek izparevanja, ki se uporablja za preskusne vzorce lesa in lesnih proizvodov, ki so nato še biološko preskušeni.
OPOMBA:   Metodo je mogoče uporabiti tudi za predhodno obdelavo neobdelanega lesa, obdelanega lesa in lesnih panelov, ne glede na to, ali so bili obdelani z zaščitnimi sredstvi ali ne.

General Information

• Status: Published
• Publication Date: 16-Apr-2024
• ICS: 71.100.50 - Wood-protecting chemicals
• Technical Committee: LLZ - Les, lesni izdelki in zaščita lesa
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 08-Apr-2024
• Due Date: 13-Jun-2024
• Completion Date: 17-Apr-2024
• Ref Project: EN 73:2020+A1:2024 - Durability of wood and wood-based products - Accelerated ageing of treated wood prior to biological testing - Evaporative ageing procedure

Relations

• Merged From: SIST EN 73:2020/oprA1:2023 - Durability of wood and wood-based products - Accelerated ageing of treated wood prior to biological testing - Evaporative ageing procedure
• Effective Date: 06-Dec-2023
• Merged From: SIST EN 73:2020 - Durability of wood and wood-based products - Accelerated ageing of treated wood prior to biological testing - Evaporative ageing procedure
• Effective Date: 06-Dec-2023

Overview

SIST EN 73:2020+A1:2024 is a European standard developed by CEN that specifies an evaporative ageing procedure for wood and wood-based products treated with preservatives before they undergo biological testing. This accelerated ageing method simulates the volatilization and loss of wood preservatives under controlled laboratory conditions, reflecting real-world exposure and helping to assess the durability of the treated wood.

The procedure is applicable not only to treated wood but also to untreated, modified wood, and wood-based panels, whether preservative-treated or not. The standard ensures consistent pre-conditioning of test specimens, which is critical for reliable biological testing outcomes.

Key Topics

• Scope and Application

  • Applies to wood and wood-based products as test specimens before biological testing.
  • Includes treated, untreated, modified, and panel wood products.

• Evaporative Ageing Principle

  • Specimens are exposed to a controlled, dust-free airflow at a defined temperature (40 ± 2 °C) and velocity (1 ± 0.3 m/s).
  • Exposure typically lasts 12 weeks to mimic preservative volatilization.
  • During ageing, specimens are rotated periodically to ensure uniform evaporation.

• Test Specimen Preparation

  • Specimens must be prepared and conditioned according to relevant biological testing standards.
  • The ageing procedure should begin within three months of specimen preparation.
  • Specimens can be stored at (20 ± 2) °C and (65 ± 5) % relative humidity before and after ageing.

• Equipment Requirements

  • Use a compartmentalized wind tunnel with heating and air distribution for controlled, uniform ageing conditions.
  • Instruments must accurately measure temperature and air velocity.

• Procedure Details

  • Positioning of specimens to allow optimal airflow without cross-contamination.
  • Rotation of specimens through 180° on a horizontal or vertical axis every two weeks to simulate even ageing.
  • Guidelines for handling multiple specimens within compartments.

• Reporting and Documentation

  • Biological test reports must reference this standard, specifying exposure duration, storage conditions, and any deviations.
  • The ageing period and timing relative to biological testing must be documented to ensure traceability.

Applications

• Wood Durability Testing

  • Accelerates the ageing of preservative-treated wood to anticipate long-term performance under biological stress.
  • Supports the evaluation of wood preservatives’ effectiveness against fungi, insects, and other degrading organisms.

• Quality Control and Product Development

  • Ensures wood products meet durability standards before market release.
  • Assists manufacturers in improving preservative formulations through reproducible ageing conditions.

• Compliance and Certification

  • Provides a harmonized method for European timber standards compliance.
  • Facilitates certification and regulatory approval by providing standardized ageing protocols.

• Research and Innovation

  • Used in forestry, wood science research, and development of novel wood modification techniques.
  • Enables comparative testing of various wood treatments, including untreated and modified wood.

Related Standards

• EN 46-2: Wood preservatives - Testing preventive action against larvae of Hylotrupes bajulus (Ovicidal effect).
• EN 113: Determination of protective effectiveness against wood-destroying basidiomycetes (fungi).
• EN 118: Testing preventive action against European termites (Reticulitermes species).
• EN 599-1: Durability of wood and wood-based products - Specification of efficacy for preventive wood preservatives according to use class.

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Keywords: Durability of wood, wood preservatives, evaporative ageing, accelerated ageing, treated wood testing, biological testing of wood, wood-based products, wood modification, wood durability standards, CEN standards, SIST EN 73:2020+A1:2024, wood preservative volatilization, pre-conditioning of wood, laboratory ageing procedures.

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2024
Trajnost lesa in lesnih proizvodov - Pospešeno staranje zaščitenega lesa pred
biološkim preskušanjem - Postopek izparevanja (vključno z dopolnilom A1)
Durability of wood and wood-based products - Accelerated ageing of treated wood prior
to biological testing - Evaporative ageing procedure
Dauerhaftigkeit von Holz und Holzprodukten - Beschleunigte Alterung von behandeltem
Holz vor biologischen Prüfungen - Verdunstungsbeanspruchung
Durabilité du bois et des produits dérivés - Épreuves de vieillissement accéléré des bois
traités avant essais biologiques - Épreuve d'évaporation
Ta slovenski standard je istoveten z: EN 73:2020+A1:2024
ICS:
71.100.50 Kemikalije za zaščito lesa Wood-protecting chemicals
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 73:2020+A1
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2024
EUROPÄISCHE NORM
ICS 71.100.50 Supersedes EN 73:2020
English Version
Durability of wood and wood-based products - Accelerated
ageing of treated wood prior to biological testing -
Evaporative ageing procedure
Durabilité du bois et des produits dérivés - Épreuves Dauerhaftigkeit von Holz und Holzprodukten -
de vieillissement accéléré des bois traités avant essais Beschleunigte Alterung von behandeltem Holz vor
biologiques - Épreuve d'évaporation biologischen Prüfungen - Verdunstungsbeanspruchung
This European Standard was approved by CEN on 24 February 2020 and includes Amendment approved by CEN on 18
December 2023.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC 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
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 73:2020+A1:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Principle . 5
5 Equipment . 5
6 Test specimens . 6
6.1 Definition and origin . 6
6.2 Number of test specimens . 6
7 Procedure. 6
7.1 Arrangement of the test specimens . 6
7.2 Starting and adjustment of the apparatus . 7
7.3 Ageing procedure . 7
7.4 Exposure period in the tunnel . 9
8 Destination of the test specimens after the evaporative ageing procedure . 9
9 Reference to this document in biological test reports . 9
Bibliography . 10

European foreword
This document (EN 73:2020+A1:2024) has been prepared by Technical Committee CEN/TC 38
“Durability of wood and wood-based products”, the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by August 2024, and conflicting national standards shall be
withdrawn at the latest by August 2024.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
!EN 73:2020 superseded EN 73:2014. Data using edition EN 73:2014 may still be used.
Compared to EN 73:2014 the following modifications have been made in EN 73:2020:"
— change of title;
— inclusion of untreated wood, modified wood and wood-based panel products in the Scope;
— inclusion of a statement regarding the maximum period of time permitted between the completion
of the ageing procedure and the start of the biological test procedure;
— inclusion of a requirement that this period of time be stated in the biological test report.
This document includes Amendment 1 approved by CEN on 18 December 2023.
This document supersedes EN 73:2020.
The start and finish of text introduced or altered by amendment is indicated in the text by tags !".
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,
Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United
Kingdom.
Introduction
During its service life, preservative-treated wood can be exposed to conditions which may cause the
volatilization and removal of the wood preservative thereby reducing its effectiveness.
This document provides a laboratory based method for ageing test specimens which are to be subject to
biological testing.
1 Scope
This document specifies an evaporative ageing procedure, applicable to test specimens of wood and
wood-based products which are subsequently subjected to biological tests.
NOTE The method can also be used for pre-conditioning of untreated wood, modified wood and wood-based
panel produc
...