SIST-TS ENV 839:2004
(Main)Wood preservatives - Determination of the protective effectiveness against wood destroying basidiomycetes - Application by surface treatment
Wood preservatives - Determination of the protective effectiveness against wood destroying basidiomycetes - Application by surface treatment
This European Prestandard specifies a method of test for determining the protective effectiveness of a wood preservative, applied to the surface of the wood, against wood destroying basidiomycetes cultured on an agar medium.
The method is applicable to all products which are to be applied by superficial application processes. This includes :
organic solvent-based wood preservatives ; or
organic water-dispersible formulations, as supplied or as prepared in the laboratory by dilution of concentrates ; or
water-soluble products ; or
chemicals which are being studied as active ingredients for application by superficial processes.
NOTE This method may be used in conjunction with an ageing procedure, for example EN 73.
Holzschutzmittel - Bestimmung der vorbeugenden Wirksamkeit gegen holzzerstörende Basidiomyceten - Anwendung mit Oberflächenverfahren
Produits de préservation du bois - Détermination de l'efficacité protectrice vis-a-vis des champignons basidiomycetes lignivores - Application par traitement de surface
La présente Prénorme européenne spécifie une méthode de détermination de l'efficacité protectrice d'un produit de préservation du bois, appliqué par un traitement de surface, vis-à-vis des champignons basidiomycètes lignivores cultivés sur milieu gélosé.
La présente méthode est applicable à tous produits qui sont appliqués par des procédés de traitement de surface. Cela comprend :
les produits de préservation du bois solubles dans les solvants organiques ; ou
des formules organiques hydrodispersables telles qu'elles sont livrées ou obtenues en laboratoire à partir de concentrés ; ou
des produits hydrosolubles ; ou
des produits chimiques étudiés en tant que matières actives pour l'application par des procédés de traitement de surface.
NOTE Cette méthode peut être utilisée conjointement à une épreuve de vieillissement par exemple EN 73.
Wood preservatives - Determination of the protective effectiveness against wood destroying basidiomycetes - Application by surface treatment
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2004
Wood preservatives - Determination of the protective effectiveness against wood
destroying basidiomycetes - Application by surface treatment
Wood preservatives - Determination of the protective effectiveness against wood
destroying basidiomycetes - Application by surface treatment
Holzschutzmittel - Bestimmung der vorbeugenden Wirksamkeit gegen holzzerstörende
Basidiomyceten - Anwendung mit Oberflächenverfahren
Produits de préservation du bois - Détermination de l'efficacité protectrice vis-a-vis des
champignons basidiomycetes lignivores - Application par traitement de surface
Ta slovenski standard je istoveten z: ENV 839:2002
ICS:
71.100.50 .HPLNDOLMH]D]DãþLWROHVD Wood-protecting chemicals
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN PRESTANDARD
ENV 839
PRÉNORME EUROPÉENNE
EUROPÄISCHE VORNORM
March 2002
ICS 71.100.50 Supersedes ENV 839:1993
English version
Wood preservatives - Determination of the protective
effectiveness against wood destroying basidiomycetes -
Application by surface treatment
Produits de préservation du bois - Détermination de Holzschutzmittel - Bestimmung der vorbeugenden
l'efficacité protectrice vis-à-vis des champignons Wirksamkeit gegen holzzerstörende Basidiomyceten -
basidiomycètes lignivores - Application par traitement de Anwendung mit Oberflächenverfahren
surface
This European Prestandard (ENV) was approved by CEN on 23 December 2001 as a prospective standard for provisional application.
The period of validity of this ENV is limited initially to three years. After two years the members of CEN will be requested to submit their
comments, particularly on the question whether the ENV can be converted into a European Standard.
CEN members are required to announce the existence of this ENV in the same way as for an EN and to make the ENV available promptly
at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the ENV) until the final
decision about the possible conversion of the ENV into an EN is reached.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2002 CEN All rights of exploitation in any form and by any means reserved Ref. No. ENV 839:2002 E
worldwide for CEN national Members.
Contents
page
Foreword.3
Introduction .4
1 Scope .5
2 Normative references .5
3 Terms and definitions.5
4 Principle.5
5 Test materials and apparatus .6
5.1 Biological material .6
5.2 Products and reagents.7
5.3 Apparatus .7
6 Sampling of the preservative.8
7 Test specimens .8
7.1 Species of wood.8
7.2 Wood quality.8
7.3 Provision of the test specimens.8
7.4 Dimensions and density of specimens .9
7.5 Number and distribution of test specimens.9
8 Procedure .9
8.1 Preparation of the untreated test specimens.9
8.2 Preparation of the treated test specimens .10
8.3 Exposure to fungi .10
8.4 Culture conditions and duration of test .11
8.5 Assessment of test .11
9 Statement of results .12
10 Test report .12
Annex A (informative) Test fungi .14
Annex B (normative) Methods of sterilization.16
Annex C (informative) Example of a test report.18
Bibliography .21
Foreword
This document ENV 839:2002 has been prepared by Technical Committee CEN/TC 38 "Durability of wood and
derived materials", the secretariat of which is held by AFNOR.
This document supersedes ENV 839:1993.
This standard includes annexes A and C that are informative and an annex B that is normative.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to announce this European Prestandard: Austria, Belgium, Czech Republic, Denmark, Finland,
France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain,
Sweden, Switzerland and the United Kingdom.
Introduction
This European Prestandard specifies a laboratory method of test which gives a basis for assessing the
effectiveness of a wood preservative, when applied as a surface treatment, against wood destroying
basidiomycetes. It tests whether the applied treatment is able to prevent the penetration of the fungi into the
untreated interior of the test specimens under the conditions of test.
This laboratory method provides one criterion by which the value of a product can be assessed. In making this
assessment, the methods by which the preservative may be applied should be taken into account. It is also
recommended that this information be supplemented by data from other relevant tests and above all by practical
experience.
The procedures described in this standard method are intended to be carried out by suitably trained and/or
supervised specialists.
1 Scope
This European Prestandard specifies a method of test for determining the protective effectiveness of a wood
preservative, applied to the surface of the wood, against wood destroying basidiomycetes cultured on an agar
medium.
The method is applicable to all products which are to be applied by superficial application processes. This
includes :
organic solvent-based wood preservatives ; or
organic water-dispersible formulations, as supplied or as prepared in the laboratory by dilution of concentrates ; or
water-soluble products ; or
chemicals which are being studied as active ingredients for application by superficial processes.
NOTE This method may be used in conjunction with an ageing procedure, for example EN 73.
2 Normative references
This European Prestandard incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For
dated references, subsequent amendments to or revisions of any of these publications apply to this European
Prestandard only when incorporated in it by amendment or revision. For undated references the latest edition of the
publication referred to applies (including amendments).
EN ISO 3696, Water for analytical laboratory use - Specification and test methods (ISO 3696:1987).
3 Terms and definitions
For the purposes of this European Prestandard, the following terms and definitions apply.
3.1
superficial application process
process which does not include particular features or procedures intended to overcome the natural resistance of
wood to penetration by a wood preservative product in its ready to use form
3.2
representative sample
sample having its physical or chemical characteristics identical to the volumetric average characteristics of the total
volume being sampled
3.3
supplier
sponsor of the test
4 Principle
Several series of test specimens of a susceptible wood species are end-sealed with a material to prevent
penetration of the test product into the end grain of the specimens. The end-sealed specimens are treated with the
wood preservative product under test using the process and application rate specified by the supplier.
NOTE Suitable application methods are brushing, pipetting and dipping.
The treated test specimens are exposed to attack by basidiomycetes in pure culture. The performance of the test
product is assessed in terms of its ability to prevent visible decay and its ability to prevent colonization of the
untreated interior of the test specimens.
5 Test materials and apparatus
5.1 Biological material
The test fungi to be used are as follows :
5.1.1 Obligatory fungus in all cases
Coniophora puteana (Schumacher ex Fries) Karsten (BAM Ebw. 15) on softwood.
Loss in mass of Scots pine sapwood in 16 weeks: a mass fraction of minimum 20 %.
5.1.2 Obligatory fungus for particular hazards
Coriolus versicolor (Linnaeus) Quélet (CTB 863A) on hardwood and/or on softwood as appropriate.
Loss in mass of beech in 16 weeks: a mass fraction of minimum 20 %.
Loss in mass of Scots pine sapwood in 16 weeks: a mass fraction of minimum 15 %.
5.1.3 Two species to be used compulsorily on the basis of the nature of the test product
For all products except creosote-type products :
Poria placenta (Fries) Cooke sensu J. Eriksson (FPRL 280) on softwood.
Loss in mass of Scots pine sapwood in 16 weeks: a mass fraction of minimum 20 %;
Gloeophyllum trabeum (Persoon ex Fries) Murrill (BAM Ebw. 109) on softwood.
Loss in mass of Scots pine sapwood in 16 weeks: a mass fraction of minimum 20 %.
For creosotes and similar products :
Lentinus lepideus Fries ex Fries (BAM Ebw. 20) on softwood.
Loss in mass of Scots pine sapwood in 16 weeks: a mass fraction of minimum 20 %;
Lentinus cyathiformis (Schaeffer ex Fries) Bresadola (CTB 67-02B) on hardwood.
Loss in mass of beech in 16 weeks: a mass fraction of minimum 20 %.
5.1.4 Optional fungi
For specific regional uses or conditions, it is also possible to select other fungi on an optional basis.
NOTE When optional fungi are used, information similar to that given in annex A for the obligatory fungi should be included
in the test report.
5.1.5 Maintenance of strains
The strains shall be maintained and treated (frequency of subculturing, alternation of culture media, etc.) in
accordance with the instructions of their laboratory of origin (see A.2). The parent strain shall be maintained in the
laboratory of its origin so as to conserve and to assure its vigour.
If tests are not undertaken regularly or if a strain shows signs of degeneration a new standard culture of the strain
should be obtained from the laboratory of its origin for each test (see A.2). When new strains are received, the
virulence shall be tested to ensure the strain can achieve the minimum loss in mass (see 5.1.1, 5.1.2 and 5.1.3).
5.2 Products and reagents
5.2.1 Culture medium
The culture medium is a malt agar medium with the following composition :
malt extract :
in concentrated form: (50 ± 0,5) g ;
in powder form: (40 ± 0,5) g ;
agar causing no inhibition of growth of fungi :
(20 ± 0,5) g to (30 ± 0,5) g ;
water conforming to grade 3 of ISO 3696 :
quantity to make up to 1000 ml.
Prepare this medium by warming the mixture in a boiling water bath or steam bath, stirring until completely
dissolved.
Place in each culture vessel (5.3.1) a sufficient quantity of the medium to provide a minimum depth of 3 mm to
4 mm when in its in-use position. Close the vessels as specified in 5.3.1 and
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.