SIST EN 12490:2010

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



SIST EN 12490:2010



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



EN 12490:2010 (E) 2 Contents Page Foreword .31 Scope .42 Normative references .43 Terms and definitions .44 Sampling of creosote-treated wood for the determination of penetration and retention .54.1 General requirements .54.2 Specific requirements for test samples for the determination of penetration .64.3 Specific requirements for test samples for the determination of retention .65 Determination of the penetration of creosote in treated wood .66 Determination of the retention of creosote in treated wood .76.1 Reagents .76.2 Apparatus .76.3 Preparation of the water trap and the condenser before the extraction .96.4 Procedure for the extraction of creosote from the composite sample .96.5 Expression of results . 107 Test report . 10Annex A (informative)
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



EN 12490:2010 (E) 3 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. SIST EN 12490:2010



EN 12490:2010 (E) 4 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] SIST EN 12490:2010



EN 12490:2010 (E) 5 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. SIST EN 12490:2010



EN 12490:2010 (E) 6 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 bottle
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