EN 12490:2010

Durability of wood and wood-based products - Preservative-treated solid wood - Determination of the penetration and retention of creosote in treated wood

This European Standard specifies the reference methods for determining the penetration and retention of creosote in timber freshly treated with creosote, principally in order to ascertain whether the treated timber conforms to specifications written in terms of EN 351-1. It also provides guidance on the acquisition of test samples and their handling between sampling and analysis.
NOTE   In the day-to-day practice at the plant, other methods (e.g. weighing the charge before and after treatment) can be used for determining the retention, provided that a significant relationship can be established with this method.

Dauerhaftigkeit von Holz und Holzprodukten - Mit Holzschutzmitteln behandeltes Vollholz - Bestimmung der Eindringtiefe und der Aufnahme von Kreosot (Teerimprägnieröl) in behandeltem Holz

Diese Europäische Norm legt ein Referenzverfahren zur Bestimmung der Eindringtiefe und der Aufnahme an
Kreosot (Teerimprägnieröl) in damit frisch behandeltem Holz fest, hauptsächlich, um festzustellen, ob das behandelte Holz den in EN 351-1 festgelegten Vorgaben entspricht. Sie gibt auch eine Anleitung für die Entnahme von Testproben sowie für deren Behandlung zwischen der Probenahme und der Analyse.
ANMERKUNG In der täglichen Praxis im Betrieb können weitere Verfahren (z. B. Wägen der Charge vor und nach der Behandlung) angewendet werden, vorausgesetzt, es kann eine eindeutige Beziehung zum genannten Verfahren her-
gestellt werden.

Durabilité du bois et des matériaux dérivés du bois - Bois massif traité avec un produit de préservation - Détermination de la pénétration et de la rétention de créosote dans le bois traité

La présente Norme européenne spécifie la méthode de référence utile à la détermination de la pénétration et de la rétention de la créosote dans le bois fraîchement traité avec cette dernière, principalement en vue de vérifier si le bois traité est conforme aux spécifications données dans l'EN 351-1. Elle fournit également des recommandations relatives à l'acquisition d'échantillons d'essai et à leur manipulation entre l'échantillonnage et l'analyse.
NOTE   Lors de la pratique quotidienne en usine, d'autres méthodes (par exemple la pesée avant et après le traitement) peuvent être utilisées pour déterminer la rétention, à condition qu'une relation significative puisse être établie avec la présente méthode.

Trajnost lesa in lesnih proizvodov - Zaščiten masivni les - Ugotavljanje penetracije in navzema kreozotnega olja v zaščitenem lesu

Ta evropski standard določa referenčne metode za ugotavljanje penetracije in navzema kreozotnega olja v lesu, ki je bil pravkar zaščiten s kreozotnim oljem, predvsem z namenom ugotoviti, ali zaščiten les ustreza specifikacijam zapisanim v smislu EN 351-1. Prav tako podaja navodila o pridobivanju preskusnih vzorcev in njihovega rokovanja med vzorčenjem in analizo. OPOMBA: V vsakodnevni praksi v tovarni se lahko uporabijo druge metode (npr. tehtanje obtežitve pred in po obdelavi) za ugotavljanje navzema, pod pogojem, da s to metodo lahko zagotovi bistven odnos.

General Information

• Status: Published
• Publication Date: 22-Jun-2010
• Withdrawal Date: 30-Dec-2010
• ICS: 71.100.50 - Wood-protecting chemicals
• ICS: 79.040 - Wood, sawlogs and sawn timber
• Technical Committee: CEN/TC 38 - Durability of wood and derived materials
• Drafting Committee: CEN/TC 38/WG 26 - Physical/chemical factors (analytical methods)
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 19-Nov-2020
• Completion Date: 23-Sep-2025
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Directive: 89/106/EEC - Construction products
• Ref Project: SIST EN 12490:2010 - Durability of wood and wood-based products - Preservative-treated solid wood - Determination of the penetration and retention of creosote in treated wood

Relations

• Replaces: EN 12490:1998 - Durability of wood and wood-based products - Preservative-treated solid wood - Determination of the penetration and retention of creosote in treated wood
• Effective Date: 28-Jun-2010

Overview

EN 12490:2010 - issued by CEN - is the European reference method for assessing creosote penetration and retention in preservative‑treated solid wood. The standard specifies sampling guidance, visual assessment of creosote penetration and a laboratory extraction method to quantify creosote retention in freshly treated timber, principally to verify conformity with requirements expressed in EN 351‑1. It also gives handling rules for test samples (cooling, storage) and notes where plant methods (e.g. weighing charge before/after treatment) may be acceptable if a validated relationship is demonstrated.

Key topics and technical requirements

• Scope & purpose: Reference methods for determining depth of creosote penetration and mass retention of creosote in treated timber; guidance on sampling and sample handling.
• Sampling rules:
  • Allow freshly treated wood to cool to ambient before sampling.
  • Penetration measurements must be taken immediately after sampling to avoid migration.
  • For retention, batches should be sampled within 30 days of treatment.
  • Composite samples must contain enough material to yield at least 1 g creosote.
• Penetration assessment:
  • Visual measurement of the furthest point (mm) where creosote is visible from the surface, following EN 351‑2 recommendations.
  • If sapwood/heartwood boundary is unclear, chemical tests (Annex A) may be used; where indistinguishable, treat all as sapwood.
• Retention determination (laboratory extraction):
  • Soxhlet-type extraction with toluene, water trap (Dean & Stark), and reflux condenser as described.
  • Apparatus cleaning and drying procedures (e.g., oven at 115 ± 5 °C for thimbles) are specified to avoid loss and contamination.
  • Extraction time: minimum 2 h up to 6 h and continued until solvent becomes colourless.
  • Use water of analytical grade (EN ISO 3696) and specified reagents for cleaning.
• Reporting & traceability: Test report requirements and definitions (batch, charge, sampling unit, composite sample) are defined for conformity assessment.

Applications and users

• Quality control and acceptance testing in timber treatment plants and laboratory testing facilities.
• Specifiers and procurement teams verifying compliance with EN 351‑1 preservative penetration and retention classes.
• Certification bodies, regulatory authorities and consultants evaluating long‑term durability of creosote‑treated railway sleepers, poles, marine uses and other treated timber products.
• Useful for product development, process validation and establishing plant‑level correlations (e.g., mass‑balance methods) against the reference method.

Related standards

• EN 351‑1: Classification of preservative penetration and retention (prescriptive limits)
• EN 351‑2: Guidance on sampling for preservative analysis
• EN ISO 3696: Water for analytical laboratory use
• ISO 3131: Density determination for wood (reference for volume/retention calculations)

Keywords: EN 12490:2010, creosote penetration, creosote retention, preservative‑treated wood, creosote‑treated timber, EN 351‑1, Soxhlet extraction, timber testing, CEN.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Dauerhaftigkeit von Holz und Holzwerkstoffen - Mit Holzschutzmitteln behandeltes Vollholz - Bestimmung der Eindringtiefe und der Aufnahme von Kreosot (Teerimprägnieröl) in behandeltem HolzDurabilité du bois et des matériaux dérivés du bois - Bois massif traité avec un produit de préservation - Détermination des pénétrations et des rétentions des créosotes dans le bois traitéDurability of wood and wood-based products - Preservative-treated solid wood - Determination of the penetration and retention of creosote in treated wood79.040Les, hlodovina in žagan lesWood, sawlogs and sawn timber71.100.50Wood-protecting chemicalsICS:Ta slovenski standard je istoveten z:EN 12490:2010SIST EN 12490:2010en,fr,de01-oktober-2010SIST EN 12490:2010SLOVENSKI
STANDARDSIST EN 12490:20041DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12490
June 2010 ICS 71.100.50; 79.040 Supersedes EN 12490:1998English Version
Durability of wood and wood-based products - Preservative-treated solid wood - Determination of the penetration and retention of creosote in treated wood
Durabilité du bois et des matériaux dérivés du bois - Bois massif traité avec un produit de préservation - Détermination de la pénétration et de la rétention de créosote dans le bois traité
Dauerhaftigkeit von Holz und Holzprodukten - Mit Holzschutzmitteln behandeltes Vollholz - Bestimmung der Eindringtiefe und der Aufnahme von Kreosot (Teerimprägnieröl) in behandeltem Holz This European Standard was approved by CEN on 19 May 2010.
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 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 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12490:2010: ESIST EN 12490:2010

Sapwood/heartwood boundary determination . 12A.1 Scope . 12A.2 Pines . 12A.2.1 Reagents . 12A.2.2 Procedure . 12A.3 Douglas fir . 13A.3.1 Reagents . 13A.3.2 Procedure . 13Annex B (normative)
Density of some selected timber species that are commonly treated with creosote . 14Bibliography . 15 SIST EN 12490:2010

Preservative-treated solid wood
Part 1: Classification of preservative penetration and retention EN 351-2, Durability of wood and wood-based products
Preservative-treated solid wood
Part 2: Guidance on sampling for the analysis of preservative-treated wood EN ISO 3696:1995, Water for analytical laboratory use
Specification and test methods (ISO 3696:1987) ISO 3131, Wood
Determination of density for physical and mechanical tests 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 analytical zone part of the treated wood which is analysed for assessing compliance with the retention requirement
[Adapted from EN 1001-2:2005, 4.03] NOTE For definition of "retention requirement", see 3.6. 3.2 batch clearly identifiable collection of units of preservative-treated wood manufactured to conform to the same defined penetration and retention requirements
[EN 1001-2:2005, 4.04] 3.3 charge all the wood treated together in a single operation
[EN 1001-2:2005, 4.13] SIST EN 12490:2010

[EN 1001-2:2005, 4.15] 3.5 penetration requirement minimum depth to which the creosote is required to penetrate the wood [Adapted from EN 1001-2.2005, 4.59] 3.6 retention requirement loading of the creosote that is required in the analytical zone [Adapted from EN 1001-2:2005, 4.73] NOTE 1 For definition of "analytical zone" see 3.1. NOTE 2 The retention requirement is expressed in kilograms of creosote per cubic metre of treated wood. 3.7 sampling unit unit (for example a pole, a sleeper, a board or a fence post) of preservative treated wood taken from a batch or charge of preservative treated wood [Adapted from EN 1001-2:2005, 4.75] NOTE For definition of "batch" see 3.2. For definition of "charge" see 3.3. 3.8 test sample portion of preservative treated wood taken from a sampling unit, in accordance with the recommendations of EN 351-2 3.9 transition wood wood in a zone between the true sapwood and the true heartwood [Adapted from EN 1001-2:2005, 1.45] NOTE This is distinguishable only in a very few wood species. In general its treatability is similar to that of heartwood. 4 Sampling of creosote-treated wood for the determination of penetration and retention 4.1 General requirements The acquisition of sampling units and test samples shall follow the procedures established in EN 351-1 and EN 351-2. Additionally, when sampling from a freshly treated batch, the wood shall be allowed to cool to ambient temperature before taking test samples. SIST EN 12490:2010

composite sample. NOTE 3 The larger the number of test samples included in the composite
sample, the more accurate the resultant retention determination should be. As soon as possible after the test samples have been obtained, and the penetration measured the wood not included in the specified analytical zone of the test samples shall be removed. The remaining wood constitutes the composite sample for the determination of retention. NOTE 4 If the penetration and retention are determined from the same test samples, the penetration should be determined before any wood is removed from the test samples. The composite sample shall be stored in a stoppered glass bottle
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