1、December 2014 Translation by DIN-Sprachendienst.English price group 8No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).IC
2、S 71.100.50!%Zf“2275567www.din.deDDIN EN 73Wood preservatives Accelerated ageing of treated wood prior to biological testing Evaporative ageing procedure;English version EN 73:2014,English translation of DIN EN 73:2014-12Holzschutzmittel Beschleunigte Alterung von behandeltem Holz vor biologischen P
3、rfungen Verdunstungsbeanspruchung;Englische Fassung EN 73:2014,Englische bersetzung von DIN EN 73:2014-12Produits de prservation du bois preuves de vieillissement acclr des bois traits avant essais biologiques preuve dvaporation;Version anglaise EN 73:2014,Traduction anglaise de DIN EN 73:2014-12Sup
4、ersedesDIN EN 73:1990-04www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 11 pages 11.14 DIN EN 73:2014-12 2 A comma is used as the decimal marker. National foreword This document (EN 73:2014) has been prepared by Technical Committee CEN/
5、TC 38 “Durability of wood and wood-based products” (Secretariat: AFNOR, France). The responsible German body involved in its preparation was the DIN-Normenausschuss Holzwirtschaft und Mbel (DIN Standards Committee Timber and Furniture), Working Committee NA 042-03-06 AA Dauer-haftigkeit von Holz und
6、 Holzprodukten. Amendments This standard differs from DIN EN 73:1990-04 as follows: a) an Introduction has been added; b) grids have been introduced in 5.1 to carry the test specimens. Previous editions DIN EN 73: 1978-10, 1990-04 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 73 October 2014
7、ICS 71.100.50 Supersedes EN 73:1988English Version Wood preservatives - Accelerated ageing of treated wood prior to biological testing - Evaporative ageing procedure Produits de prservation du bois - preuves de vieillissement acclr des bois traits avant essais biologiques - preuve dvaporation Holzsc
8、hutzmittel - Beschleunigte Alterung von behandeltem Holz vor biologischen Prfungen - Verdunstungsbeanspruchung This European Standard was approved by CEN on 30 August 2014. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Europe
9、an 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
10、(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, Belg
11、ium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switze
12、rland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national
13、 Members. Ref. No. EN 73:2014 EEN 73:2014 (E) 2 Contents Page Foreword 3 Introduction .4 1 Scope 5 2 Principle 5 3 Equipment 5 4 Test specimens 5 5 Procedure .6 6 Destination of the test specimens after the evaporative ageing procedure .8 7 Reference to this standard in biological test reports 8 Bib
14、liography 9 DINEN 73:2014-12EN 73:2014(E)3 Foreword This document (EN 73:2014) 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 b
15、y publication of an identical text or by endorsement, at the latest by April 2015 and conflicting national standards shall be withdrawn at the latest by April 2015. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELE
16、C shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 73:1988. Compared to EN 73:1988 the following modifications have been made: a) an Introduction has been added; b) grids have been introduced in 5.1 to carry the test specimens. According to the
17、 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hu
18、ngary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 73:2014-12 EN 73:2014 (E) 4 Introduction During its service life, preservative-treated wood can
19、be exposed to conditions which may cause the volatilization and removal of the wood preservative thereby reducing its effectiveness. This European Standard provides a laboratory based method for ageing test blocks which are to be subject to biological testing. DIN EN 73:2014-12 EN 73:2014 (E) 5 1 Sc
20、ope This European Standard specifies an evaporative ageing procedure, applicable to test specimens of wood which have been previously treated with a wood preservative, in order to evaluate any loss of effectiveness when these test specimens are subsequently subjected to biological tests. 2 Principle
21、 Test specimens are prepared for biological testing of the effectiveness of wood preservatives against either fungi or insects using the appropriate standards methods. Test specimens are exposed, for a specified period, in a dust-free current of air of a defined velocity and temperature. 3 Equipment
22、 3.1 A wind tunnel which is compartmented and fitted with devices for heating and distributing air. The air shall be dust-free and shall not be polluted by chemical products which could have an effect on the test results. The heating and distribution devices shall be such that the temperature and ai
23、r velocity are maintained constant and uniform in each compartment. The air leaving the tunnel shall be led away in such a manner that it cannot re-enter the tunnel. 3.2 A device which: a) controls the temperature within the defined limits stated in 5.2; b) measures and records the air temperature w
24、ithin the defined limits as stated in 5.2. 3.3 An anemometer capable of measuring air velocity of (1 0,3) m/s. 4 Test specimens 4.1 Definitions and origin The test specimens and their preparation are defined in the standards concerning the biological tests to which they are intended to be subjected.
25、 The evaporative ageing procedure shall be carried out no more than 3 months after the end of the conditioning period that follows the treatment of the test specimens described in the relevant biological test standard. An alternative period can be used if specified by the product supplier. This shal
26、l be stated in the test report. 4.2 Number of test specimens The number of test specimens shall allow the relevant biological tests to be carried out in accordance with the instructions in the appropriate standards, bearing in mind that the evaporative ageing procedure shall be applied equally to tr
27、eated test specimens that are subjected to biological agents and to control test specimens. DIN EN 73:2014-12 EN 73:2014(E)6 The control test specimens may be of the following kinds where required by the relevant test standard: treated control test specimens that will not be subjected to attack by b
28、iological agents after the evaporative ageing procedure. These will serve as controls for changes in mass in those tests in which this factor is taken into consideration; untreated control specimens which, after evaporative ageing, are subjected to the test by biological agents, to check any variati
29、on in the behaviour of untreated wood. 5 Procedure 5.1 Arrangement of the test specimens Arrange the test specimens in the compartments on grids made from metal or any other inert material which can be decontaminated, resting them with one of their faces on the base so that none of the other faces i
30、s less than 10 mm from the side partitions. The faces parallel to the grain of the wood shall be parallel to the general direction of air flow and they shall be at least 10 mm from the corresponding faces of the adjacent test specimens. Do not place in the same compartment either test specimens trea
31、ted with different products or with different concentrations or loadings of the same product or treated and control specimens. Arrange the test specimens according to type, as follows: Test specimens treated on all surfaces Rest the test specimens on one of the small faces parallel to the grain of w
32、ood with the faces that are perpendicular to the grain of the wood at least 20 mm away from the corresponding faces of adjacent test pieces. For example, specimens intended for testing in accordance with EN 113 (basidiomycetes). Test specimens for which the faces perpendicular to the grain of wood a
33、re sealed before treatment Arrange the test specimens as above. The sealed faces may, however, be brought closer together. For example, specimens intended for testing in accordance with EN 118 (termites). Test specimens with one treated face only Rest the test specimens on the opposite face to that
34、which has been treated. For example, test specimens intended for the test determining preventive action against termites (EN 118) and the larvae of Hylotrupes bajulus. 5.2 Starting and adjustment of the apparatus With the test specimens in position, establish an air current controlled at a temperatu
35、re of (40 2) C which enters the compartments at a speed of (1 0,3) m/s. 5.3 Procedure Maintain the test specimens in the arrangement specified in 5.1 and under the conditions specified in 5.2 for two weeks (14 days). DINEN 73:2014-12EN 73:2014(E)7 In order to obtain homogeneous evaporation from all
36、the treated faces of a test specimen, rotate the test specimens through an angle of 180 on its small horizontal axis every two week (14 days) period (see Figure 2). Test specimens with only one treated surface shall be rotated through an angle of 180 on their vertical axis every two weeks (14 days)
37、period (see Figure 3). If a compartment contains more than one test specimen, at the same time as rotating the test specimens, change the position of the specimens within this compartment, the method depending on the number of test specimens which it contains and on the duration of the procedure (se
38、e Figure 1). a) Position of test specimens in 1st week b) Position of test specimens in 2nd week c) Position of test specimens in 3rd week Each progressive move is associated with a rotation (see Figures 2 and 3). Figure 1 Movement of test specimens in a compartment containing more than one test spe
39、cimen DIN EN 73:2014-12 EN 73:2014 (E) 8 Figure 2 Rotation of test specimen with 4 or 6 treated surfaces through an angle of 180 on its small horizontal axis NOTE The specimen rests on the untreated surface that is opposite the treated surface. Figure 3 Rotation of test specimen with only one treate
40、d surface through an angle of 180 on its vertical axis 5.4 Exposure period in the tunnel The duration of the exposure period is 12 weeks. For certain specific applications alternative periods of ageing may be used, in which case the ageing period should be mentioned in the report of the biological t
41、est concerned. 6 Destination of the test specimens after the evaporative ageing procedure After completion of the ageing procedure and the post exposure conditioning period the test specimens shall be subject to biological tests within 3 months. 7 Reference to this standard in biological test report
42、s Quote the evaporative ageing procedure by giving the number of this European Standard (i.e. EN 73), the duration of evaporative ageing period and the date of the start of the biological tests in the test report for each biological test. The duration and conditions of storage of the test specimen b
43、etween initial preparation and the start of the ageing procedure shall also be reported. Any deviation from the method described in this standard shall be reported in the test report. DIN EN 73:2014-12 EN 73:2014(E)9 Bibliography 1 EN 113:1996, Wood preservatives Test method for determining the prot
44、ective effectiveness against wood destroying basidiomycetes Determination of the toxic values 2 EN 117, Wood preservatives Determination of toxic values against Reticulitermes species (European termites) (Laboratory method) 3 EN 118, Wood preservatives Determination of preventive action against Reticulitermes species (European termites) (Laboratory method) 4 EN 599-1, Durability of wood and wood-based products Efficacy of preventive wood preservatives as determined by biological tests Part 1: Specification according to Use Class DINEN 73:2014-12
