SIST EN 12490:2010

SLOVENSKI STANDARD
01-oktober-2010
Nadomešča:
SIST EN 12490:2004
Odpornost lesa in lesnih proizvodov - Zaščiten masivni les - Ugotavljanje
penetracije in navzema kreozotnega olja v zaščitenem lesu
Durability of wood and wood-based products - Preservative-treated solid wood -
Determination of the penetration and retention of creosote in treated wood
Dauerhaftigkeit von Holz und Holzwerkstoffen - Mit Holzschutzmitteln behandeltes
Vollholz - Bestimmung der Eindringtiefe und der Aufnahme von Kreosot
(Teerimprägnieröl) in behandeltem Holz
Durabilité 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 traité
Ta slovenski standard je istoveten z: EN 12490:2010
ICS:
71.100.50 Kemikalije za zaščito lesa Wood-protecting chemicals
79.040 Les, hlodovina in žagan les Wood, sawlogs and sawn
timber
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 12490
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2010
ICS 71.100.50; 79.040 Supersedes EN 12490:1998
English 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 Dauerhaftigkeit von Holz und Holzprodukten - Mit
massif traité avec un produit de préservation - Holzschutzmitteln behandeltes Vollholz - Bestimmung der
Détermination de la pénétration et de la rétention de Eindringtiefe und der Aufnahme von Kreosot
créosote dans le bois traité (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 Ref. No. EN 12490:2010: E
worldwide for CEN national Members.

Contents Page
Foreword .3
1 Scope .4
2 Normative references .4
3 Terms and definitions .4
4 Sampling of creosote-treated wood for the determination of penetration and retention .5
4.1 General requirements .5
4.2 Specific requirements for test samples for the determination of penetration .6
4.3 Specific requirements for test samples for the determination of retention .6
5 Determination of the penetration of creosote in treated wood .6
6 Determination of the retention of creosote in treated wood .7
6.1 Reagents .7
6.2 Apparatus .7
6.3 Preparation of the water trap and the condenser before the extraction .9
6.4 Procedure for the extraction of creosote from the composite sample .9
6.5 Expression of results . 10
7 Test report . 10
Annex A (informative) Sapwood/heartwood boundary determination . 12
A.1 Scope . 12
A.2 Pines . 12
A.2.1 Reagents . 12
A.2.2 Procedure . 12
A.3 Douglas fir . 13
A.3.1 Reagents . 13
A.3.2 Procedure . 13
Annex B (normative) Density of some selected timber species that are commonly treated with
creosote . 14
Bibliography . 15

Foreword
This document (EN 12490:2010) 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 December 2010, and conflicting national standards shall be withdrawn
at the latest by December 2010.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 12490:1998.
According to the CEN/CENELEC Internal Regulations, the national standards organizations 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, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
1 Scope
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.
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 351-1, Durability of wood and wood-based products ― 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]
3.4
composite sample
collection of all test samples derived from the sampling units taken from the batch in accordance with the
chosen sampling plan for the determination of retention
[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.
4.2 Specific requirements for test samples for the determination of penetration
The penetration of creosote in each of the test samples shall be determined immediately after sampling,
according to Clause 5, in order to avoid creosote migration from the treated to the untreated area.
4.3 Specific requirements for test samples for the determination of retention
A batch to be sampled for the determination of retention shall be sampled at a time less than 30 days after the
treatment.
NOTE 1 The retention requirements defined by the specifier are only applicable to treated wood as produced, not to
the treated wood in service.
The composite sample for a batch or charge shall comprise test samples taken in accordance with the
chosen sampling plan. Sufficient test sample material shall be taken to ensure that at least 1 g of creosote is
contained in the composite sample.
NOTE 2 Wood treated with creosote by vacuum/high pressure processes can normally be expected to contain more than
10 % by mass of creosote. Therefore, it will require approximately 10 g to 12 g of creosoted wood to obtain at least 1 g of
creosote in the 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 bot
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