1、 DEUTSCHE NORM May 2006DIN EN 14762 ICS 79.080 Wood flooring Sampling procedures for evaluation of conformity English version of DIN EN 14762:2006-05 Holzfubden Probenahme und Bewertung der Konformitt Englische Fassung DIN EN 14762:2006-05 Document comprises 11 pages No part of this standard may be
2、reproduced without prior permission of DIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany, has the exclusive right of sale for German Standards (DIN-Normen). English price group 6 www.din.de www.beuth.de !,ni?“10.06 9757028DIN EN 14762:2006-05 2 National forewo
3、rd This standard has been prepared by CEN/TC 175 Round and sawn timber (Secretariat: France). The responsible German body involved in its preparation was the Normenausschuss Holzwirtschaft und Mbel (Timber and Furniture Standards Committee), Technical Committee NA 042-01-14 AA Rund- und Schnittholz.
4、 The DIN Standard corresponding to the International Standard referred to in clause 2 of the EN is as follows: ISO 2859-1 DIN ISO 2859-1 National Annex NA (informative) Bibliography DIN ISO 2859-1, Sampling procedures for inspection by attributes Part 1: Sampling schemes indexed by acceptance qualit
5、y limit (AQL) for lot-by-lot inspection EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 14762February 2006ICS 79.080English VersionWood flooring - Sampling procedures for evaluation ofconformityPlancher en bois - Procdures dchantillonnage pourlvaluation de la conformitHolzfubden - Probenahme und B
6、ewertung derKonformittThis European Standard was approved by CEN on 30 December 2005.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists an
7、d bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibilit
8、y 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 national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy,
9、Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Bruss
10、els 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 (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.
11、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 Other characteristics 6 4.3 Conclusion of evaluation6 5 Sampling report 6 Bibliography.9 EN 14762:2006 (E) 3 Foreword This European Standard (EN 14762
12、: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 shall 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 conf
13、licting national standards shall be withdrawn at the latest by August 2006. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Fi
14、nland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 14762:2006 (E) 4 1 Scope This European Standard defines the sampling procedure
15、s 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. It applies separately to each of the following characteristics: moisture content, dimensions and appearance. For the other characteristics, an evalua
16、tion 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 13489, only moisture and dimensions are concerned. This European Standard does not apply to EN 13990. 2 Normative references The following referenced
17、 documents are indispensable for the application of this European Standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 13756:2002, Wood flooring Terminology ISO 2859-1, Sampling pr
18、ocedures for inspection by attributes Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection 3 Terms and definitions 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
19、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 size 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
20、 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 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 Rule
21、s 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 6,5, 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
22、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 randomly 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 shal
23、l be evaluated individually for: wood species; grading; geometrical characteristics; moisture content (average value, see 4.1 above); other characteristics. 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
24、limits specified in the product standards or in the contract. The evaluation is done by visual inspection. 4.2.4 Geometrical characteristics The geometrical characteristics of the elements shall be in accordance with the limits specified in the product standards as listed in Clause 1 or in the contr
25、act. 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 standards 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 sha
26、ll 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 elements, all the non conforming product characteristics in 4.2 shall be considered, but only one non conforming characteristic per element shall be
27、counted. The batch is considered as accepted when the number of non conforming elements are within the acceptance limit specified for each batch size in 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 re
28、jected. If the number of non conforming elements are between the acceptance limit and the non acceptance limit after the first sample, a second sample 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 sam
29、ple. If the number of non conforming elements exceeds or equals the non acceptance limit after the second sample, the batch shall be considered as rejected. 5 Sampling report The party that performs the sampling shall prepare a report. This report shall include at least the following information. -
30、name of the party that requests inspection; - name of the producer; - product information (wood species, grading, evaluation date); - batch size (N) ; - sample size (n) ; - result of the evaluation. The causes for non conformance shall be properly described. EN 14762:2006 (E) 7 Table 1 Acceptance /n
31、on acceptance limits according to the batch size First sampling Second sampling (if required) Number of non conforming elements in sample 1 Number of non conforming elements in sample 1 and sample 2 together Batch size Sample size 1stsample Ac Additional sampling required NAc Sample size 2ndsample A
32、c 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 14762:2006 (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
33、 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 and/or tongues 2 EN 13227, Wood flooring Solid lamparquet products 3 EN 13228, Wood flooring Solid wood overlay flooring elements including blocks wi
34、th an interlocking system 4 EN 13488, Wood flooring Mosaic parquet elements 5 EN 13489, Wood flooring Multi-layer parquet elements 6 EN 13629, Wood flooring 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
