EN 14762-2006 en Wood flooring - Sampling procedures for evaluation of conformity《木地板 合格评估的抽样程序》.pdf

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1、BRITISH STANDARDBS EN 14762:2006Wood flooring Sampling procedures for evaluation of conformityThe European Standard EN 14762:2006 has the status of a British StandardICS 79.080g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g

2、3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 14762:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2006 BSI ISBN 0 580 48004 6National forewordThis British Standard is the official English lan

3、guage version of EN 14762:2006.The UK participation in its preparation was entrusted to Technical Committee B/543, Round and sawn timber, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary.Cross-referencesThe British Sta

4、ndards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.Thi

5、s publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible inte

6、rnational/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK.Summary of pagesThis document comprises a front cover, an inside front cover, the EN title

7、page, pages 2 to 9 and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 14762February 2006ICS 79.080English VersionWood flooring - Sa

8、mpling procedures for evaluation ofconformityPlancher en bois - Procdures dchantillonnage pourlvaluation de la conformitHolzfubden - Probenahme und Bewertung derKonformittThis European Standard was approved by CEN on 30 December 2005.CEN members are bound to comply with the CEN/CENELEC Internal Regu

9、lations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This Euro

10、pean Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the nationa

11、l standards bodies of Austria, Belgium, 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.

12、EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14762:2006: EEN 14762:2006

13、(E) 2 Contents Page Foreword 3 1 Scope .4 2 Normative references .4 3 Terms and definitions.4 4 Rules for evaluation of conformity 5 4.1 Sampling5 4.2 Evaluation of conformity 5 4.2.1 General 5 4.2.2 Wood species5 4.2.3 Grading 5 4.2.4 Geometrical characteristics .5 4.2.5 Moisture content .6 4.2.6 O

14、ther characteristics 6 4.3 Conclusion of evaluation6 5 Sampling report 6 Bibliography.9 EN 14762:2006 (E) 3 Foreword This European Standard (EN 14762:2006) has been prepared by Technical Committee CEN/TC 175 “Round and sawn timber”, the secretariat of which is held by AFNOR. This European Standard s

15、hall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2006, and conflicting national standards shall be withdrawn at the latest by August 2006. According to the CEN/CENELEC Internal Regulations, the national standards o

16、rganizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,

17、 Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 14762:2006 (E) 4 1 Scope This European Standard defines the sampling procedures to be used for the evaluation of conformity in product standards for a batch of wood flooring elements at the time of first delivery of the product.

18、It applies separately to each of the following characteristics: moisture content, dimensions and appearance. For the other characteristics, an evaluation procedure has to be defined case by case. This European Standard applies to EN 13226, EN 13227, EN 13228, EN 13488, EN 13629 and EN 14761. For EN

19、13489, only moisture and dimensions are concerned. This European Standard does not apply to EN 13990. 2 Normative references The following referenced documents are indispensable for the application of this European Standard. For dated references, only the edition cited applies. For undated reference

20、s, the latest edition of the referenced document (including any amendments) applies. EN 13756:2002, Wood flooring Terminology ISO 2859-1, Sampling procedures for inspection by attributes Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection 3 Terms and definiti

21、ons For the purpose of this European Standard, the terms and definitions given in EN 13756:2002 and the following apply. 3.1 batch limited amount of elements delivered in one occasion, which can be assembled together and where the elements are defined to be in accordance to requirements 3.2 batch si

22、ze N number of elements in a batch 3.3 sample elements taken from the same batch for evaluation of conformity 3.4 sample size n number of elements in a sample 3.5 sampling element one of the elements in the sample EN 14762:2006 (E) 5 3.6 acceptance limit Ac maximum number of non conforming elements

23、in the sample to accept the batch 3.7 non acceptance limit NAc minimum number of non conforming elements in the sample to not accept the batch 4 Rules for evaluation of conformity 4.1 Sampling The sampling plan in Table 1 is based upon ISO 2859-1. The AQL (Acceptance Quality Limit) value is set to 6

24、,5, normal control level = 2. Table 1 shows the number of elements to be evaluated. The elements shall be picked randomly from the batch. The sample shall be evaluated for the product characteristics in 4.2 (all of them in the same sample). For moisture content, 10 test pieces shall be picked random

25、ly from each sampling and the average value is calculated and used in 4.2. 4.2 Evaluation of conformity 4.2.1 General The elements in the sample shall be evaluated individually for: wood species; grading; geometrical characteristics; moisture content (average value, see 4.1 above); other characteris

26、tics. 4.2.2 Wood species The evaluation is done by visual inspection and by measurements. 4.2.3 Grading The elements shall be in accordance with the limits specified in the product standards or in the contract. The evaluation is done by visual inspection. 4.2.4 Geometrical characteristics The geomet

27、rical characteristics of the elements shall be in accordance with the limits specified in the product standards as listed in Clause 1 or in the contract. EN 14762:2006 (E) 6 4.2.5 Moisture content The moisture content of the elements shall be in accordance with the limits specified in the product st

28、andards or in the contract. The method is determined on the basis of the product standard as listed in Clause 1. 4.2.6 Other characteristics They shall be in accordance with the limits specified in the product standard as listed in Clause 1. 4.3 Conclusion of evaluation When counting non conforming

29、elements, all the non conforming product characteristics in 4.2 shall be considered, but only one non conforming characteristic per element shall be counted. The batch is considered as accepted when the number of non conforming elements are within the acceptance limit specified for each batch size i

30、n Table 1. If the number of non conforming elements exceeds or equals the rejection limit after the first sample, the batch shall be considered as rejected. If the number of non conforming elements are between the acceptance limit and the non acceptance limit after the first sample, a second sample

31、shall be taken. The batch is considered as accepted when the number of non conforming elements are within the non acceptance limit for the second sample. If the number of non conforming elements exceeds or equals the non acceptance limit after the second sample, the batch shall be considered as reje

32、cted. 5 Sampling report The party that performs the sampling shall prepare a report. This report shall include at least the following information. - name of the party that requests inspection; - name of the producer; - product information (wood species, grading, evaluation date); - batch size (N) ;

33、- sample size (n) ; - result of the evaluation. The causes for non conformance shall be properly described. EN 14762:2006 (E) 7 Table 1 Acceptance /non acceptance limits according to the batch size First sampling Second sampling (if required) Number of non conforming elements in sample 1 Number of n

34、on conforming elements in sample 1 and sample 2 together Batch size Sample size 1stsample Ac Additional sampling required NAc Sample size 2ndsample Ac NAc 2 to 8 2 0 - 1 9 to 15 2 0 - 1 16 to 25 3 0 1 2 3 1 2 26 to 50 5 0 1 2 5 1 2 51 to 90 8 0 1 to 2 3 8 3 4 91 to 150 13 1 2 to 3 4 13 4 5 EN 14762:

35、2006 (E) 8 Table 1 (concluded) 151 to 280 20 2 3 to 4 5 20 6 7 281 to 500 32 3 4 to 6 7 32 8 9 501 to 1 200 50 5 6 to 8 9 50 12 13 1201 to 3 200 80 7 8 to 10 11 80 18 19 3 201 125 11 12 to 15 16 125 26 27 EN 14762:2006 (E) 9 Bibliography 1 EN 13226, Wood flooring Solid parquet elements with grooves

36、and/or tongues 2 EN 13227, Wood flooring Solid lamparquet products 3 EN 13228, Wood flooring Solid wood overlay flooring elements including blocks with an interlocking system 4 EN 13488, Wood flooring Mosaic parquet elements 5 EN 13489, Wood flooring Multi-layer parquet elements 6 EN 13629, Wood flo

37、oring Solid pre-assembled hardwood board 7 EN 13990, Wood flooring Solid softwood flooring boards 8 ISO 14761, Wood flooring Solid wood parquet Vertical finger, wide finger and module brick BS EN 14762:2006BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards InstitutionBSI is the independent n

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