EN 330-2014 en Wood preservatives - Determination of the relative protective effectiveness of a wood preservative for use under a coating and exposed out-of-ground contact - Field .pdf

1、BSI Standards PublicationBS EN 330:2014Wood preservatives Determination of the relativeprotective effectiveness ofa wood preservative for useunder a coating and exposedout-of-ground contact Fieldtest: L-joint methodBS EN 330:2014 BRITISH STANDARDNational forewordThis British Standard is the UK imple

2、mentation of EN 330:2014. Itsupersedes BS EN 330:1993 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee B/515, Wood preservation.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not pur

3、port to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 77206 1ICS 71.100.50Compliance with a British Standard cannot confer immunity fromlegal obligation

4、s.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 November 2014.Amendments issued since publicationDate Text affectedBS EN 330:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 330 November 2014 ICS 71.100.50 Supersedes EN 330:1993En

5、glish Version Wood preservatives - Determination of the relative protective effectiveness of a wood preservative for use under a coating and exposed out-of-ground contact - Field test: L-joint method Produits de prservation du bois - Dtermination de lefficacit protectrice dun produit de prservation

6、du bois pour emploi sous un revtement et hors de contact avec le sol - Essai de champ: mthode avec un assemblage en L Holzschutzmittel - Bestimmung der relativen Wirksamkeit eines Holzschutzmittels zur Anwendung unter einem Anstrich und ohne Erdkontakt - Freilandprfung: L-Verbindungsmethode This Eur

7、opean 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 European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references c

8、oncerning 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 (English, French, German). A version in any other language made by translation under the responsibility of a CEN member

9、 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, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, Franc

10、e, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOM

11、ITEE 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 Members. Ref. No. EN 330:2014 EBS EN 330:2014EN 330:2014 (E) 2 Contents Page Foreword 4 Introduction .5 1 Scope 6 2 No

12、rmative references 6 3 Terms and definitions .6 4 Principle 6 5 Materials .7 5.1 End-seal compounds 7 5.2 Reference coating 7 5.3 Reference preservative .7 5.4 Wood test specimens 7 6 Apparatus and Equipment . 10 6.1 Wood working equipment 10 6.2 Conditioning area . 10 6.3 Application equipment . 10

13、 6.4 Balance 10 6.5 Safety equipment and protective clothing . 10 6.6 Labels / tags 10 6.7 Exposure site 11 6.8 Weathering racks 11 7 Sampling 11 8 Treatment and handling of test L-joints . 12 8.1 General . 12 8.2 End-sealing 12 8.3 Process 12 8.4 Retention of preservative . 12 8.5 Post-treatment ha

14、ndling of the L-joints . 12 9 Reference L-joints. 13 10 Untreated test control L-joints 14 11 Exposure test site . 14 11.1 Number of test sites . 14 11.2 Installation of the L-joints at the test site . 14 12 Inspections 14 12.1 L-joints for non- destructive inspection . 14 12.2 L-joints for destruct

15、ive inspection 15 13 Evaluation 16 13.1 General . 16 13.2 Assessment of decay . 16 14 Duration of the test . 17 15 Validity of the test . 17 16 Test report . 17 BS EN 330:2014EN 330:2014 (E) 3 Annex A (informative) Flow chart for the preparation and exposure of L-joints for test 19 Annex B (informat

16、ive) Information on treatment processes, reference and alternative preservatives and materials . 20 Annex C (informative) Example of a Test Report. 22 Annex D (informative) Environmental, health and safety precautions within chemical / biological laboratory . 24 Bibliography 25 BS EN 330:2014EN 330:

17、2014 (E) 4 Foreword This document (EN 330:2014) 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 by publication of an identical t

18、ext or by endorsement, at the latest by May 2015 and conflicting national standards shall be withdrawn at the latest by May 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 CENELEC shall not be held responsible for

19、 identifying any or all such patent rights. This document supersedes EN 330:1993. Compared to EN 330:1993 the following changes have been made: The scope of the standard clarifies that the effectiveness is evaluated to a reference material; The grading system for the assessment of decay has been mod

20、ified in Table1; Modifications have been made to the duration (Clause 14) and validity (Clause 15) of the test; In Annex B information has been added that the reference wood preservatives stated in the document may only be used for research purposes in accordance with the Biocidal Products Regulatio

21、ns (Regulation (EU) No. 528/2012); An informative Annex D covering environmental, health and safety precautions has been added. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, B

22、elgium, 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, Swi

23、tzerland, Turkey and the United Kingdom. BS EN 330:2014EN 330:2014 (E) 5 Introduction This European Standard describes a method of test for wood preservatives that are intended for use under a surface coating in timber to be exposed to the weather and out of contact with the ground (Use Class 3, EN

24、335). The main objective of the test is to evaluate the relative effectiveness of the preservative applied to jointed samples of Pinus sylvestris L sapwood by a treatment technique relevant to its intended practical use. Effectiveness is evaluated relative to a reference material. The method is conc

25、erned with protection against attack by the complete sequence of microorganisms occurring under natural conditions, including those basidiomycete fungi that eventually cause decay. It takes into account the effects of weathering (light, rain and heat) on the effectiveness of a wood preservative unde

26、r a coating. The method does not accelerate the rate of decay (see Note), however the coating failure occurs immediately at the test start, that is even sooner than in badly designed and poorly maintained joinery exposed under the same conditions. The method may be used, after modification, for othe

27、r purposes including evaluating the effectiveness of a test preservative as follows: in protecting timbers of a different wood species; under different types of coating. Since the L-joints are exposed to natural outdoor conditions during the test period, variations in test conditions from one locati

28、on to another have to be expected. Differences in climate, especially rainfall, will influence the general rate of development of decay fungi. However, by comparing the results obtained for the test preservative with those obtained with the reference material and with those for untreated, control L-

29、joints, the relative protective effectiveness of the preservative under test can be evaluated. NOTE The coating is intended to make the technique relevant to the end use albeit the test pieces are badly maintained and designed in order to accelerate the test. BS EN 330:2014EN 330:2014 (E) 6 1 Scope

30、This European Standard specifies a method for determining the relative protective effectiveness against fungal decay of a wood preservative applied to wood in combination with a subsequent surface coating, exposed to the weather and out of contact with the ground. The effectiveness is evaluated rela

31、tive to a reference wood preservative. The method is applicable to the testing of commercial or experimental preservatives applied to non-durable timbers by methods appropriate to commercial practice and subsequently coated with a specified coating system. The method is applicable to products and pr

32、ocesses used individually or in combination to prevent the development of decay in the wood. The method is also appropriate for factory finishing systems which include wood protection and wood preservation claims. 2 Normative references The following documents, in whole or in part, are normatively r

33、eferenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1001-2, Durability of wood and wood based products - Terminology -

34、Part 2: Vocabulary EN 335, Durability of wood and wood-based products - Use classes: definitions, application to solid wood and wood-based products 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 1001-2 apply. 4 Principle Jointed samples (L-joints) ar

35、e treated, assembled, coated and placed out of contact with the ground and exposed to the normal environmental and ecological factors which affect coated wood so exposed in practice. The organisms that colonize such units invade in their natural sequence of moulds, blue stain fungi, soft rot fungi a

36、nd basidiomycetes. Colonization by basidiomycetes, as shown by the presence of visible decay, is assessed at least annually by visual inspection of the L-joints after they have been dismantled. In addition, periodically, sets of samples are examined after dismantling and sawing along the grain of th

37、e L-joint assemblies to reveal their internal condition. These data are compared with those generated using a reference material and untreated samples to assess relative performance. It is recommended that the replicates for non-destructive inspection continue to be exposed beyond the minimum 5 year

38、 period, preferably until failure. NOTE Inspection after sawing is necessary because application by processes such as double vacuum and superficial (surface) application does not result in complete penetration of the L-joint members. The untreated core of the samples, therefore, can show internal de

39、cay before it becomes visible on the surface within the joint. BS EN 330:2014EN 330:2014 (E) 7 5 Materials 5.1 End-seal compounds 5.1.1 Preservative resistant end-seal A material resistant to the penetration of the reference and test preservative solutions (or separate materials for each). 5.1.2 Wea

40、therproof end-seal A material that prevents water entry into the test specimen and remains effective for the duration of exposure of the test specimen to the weather. NOTE Two coats of an epoxy-resin / pitch compound have been found to be suitable. 5.2 Reference coating Opaque high gloss, gloss or s

41、emi-gloss solvent borne alkyd paint applied in 2 or 3 coats to give a dry film build of (50 5) m or an opaque water borne acrylic paint applied in 1 or 2 coats to give a dry film build of 110 m -120 m when measured by method 4A (microscope method) of ISO 2808. If a particular coating system is speci

42、fied by the supplier of the test preservative to be an integral part of the protection system, this shall be used in conjunction with the test preservative, instead of the reference coating. Details of the coating system used shall be given in the test report including the number of coats and the co

43、ntribution each coat makes to the coating system used, e.g. primer function. 5.3 Reference preservative Containing hexabutyldistannoxane (bis(tri-n-butyltin) oxide) as the active ingredient and with the following composition: Hexabutyldistannoxane minimum mass fraction of 1 % (mass fraction 95 % act

44、ive ingredient); Aliphatic neutral hydrocarbon resin mass fraction of 5 %; Hydrocarbon solvent mass fraction of 94 %, (distillation range 160 C to 215 C; aromatic content mass fraction 10% from the median (8.4) Dry in freely ventilated conditions (8.5.1) unless the supplier specifies otherwise Assem

45、ble the L-joints and apply the coating where relevant (8.5.2) Apply permanent labels (8.5.3) Apply weather resistant end-seal (8.5.4) Break the seal of the coating (where applied) across the joint and reassemble (8.5.5) Expose the test specimens L1 and L2 (11.2)Select a minimum of 20 L-joints for ea

46、ch test preservative (Clause 8), reference preservative (Clause 9) and untreated controls (Clause 10). Store the untreated L-joints until required, e.g. for coating. L1- 10, L2- 10 (5 at each of two exposure periods) Store untreated Ljoints until required for coating BS EN 330:2014EN 330:2014 (E) 20

47、 Annex B (informative) Information on treatment processes, reference and alternative preservatives and materials B.1 Model treatment methods B.1.1 General The following treatment methods are given for guidance and should be regarded as providing model treatment parameters; the double vacuum and dip

48、processes are those used for the reference preservative (1 % mass fraction hexabutyldistannoxane). The full-cell process would be a suitable method for the application of both alternative reference preservatives (B.2). B.1.2 Double vacuum process Initial vacuum 70 kPa for 3 min; atmospheric pressure

49、 for 3 min; final vacuum 35 kPa for 20min. B.1.3 Dip (immersion) process Total immersion for 3 min. B.1.4 Full-cell process Initial vacuum 20 kPa for 30 min; pressure 1.35 MPa for 60 min. It should be noted that there may be difficulties with grain raising, splitting and warping with high uptakes of water based preservatives. This can result in the test specimens requiring extended drying to ensure the components of the joint fit together. B.2 Alternative reference preservatives B.2.1 General Historically the reference preservati