1、October 2014 Translation by DIN-Sprachendienst.English price group 17No 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 79.060.01!%;w.“2248411www.din.deDDIN EN 326-2Wood-based panels Sampling, cutting and inspection Part 2: Initial type testing and factory production control;English version EN 326-2:2010+A1:2014,English translation of DIN EN 326-2:2014-10Holzwerkstoffe Probenahme, Zuschnitt und berwachung Teil 2: E
3、rstprfung des Produktes und werkseigene Produktionskontrolle;Englische Fassung EN 326-2:2010+A1:2014,Englische bersetzung von DIN EN 326-2:2014-10Panneaux base de bois Echantillonnage, dcoupe et contrle Partie 2 : Essai de type initial et contrle de la production en usine;Version anglaise EN 326-2:2
4、010+A1:2014,Traduction anglaise de DIN EN 326-2:2014-10SupersedesDIN EN 326-2:2010-12www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 46 pages 09.14 DIN EN 326-2:2014-10 2 A comma is used as the decimal marker. National foreword This doc
5、ument (EN 326-2:2010+A1:2014) has been prepared by Technical Committee CEN/TC 112 “Wood based panels” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the DIN-Normenausschuss Holzwirtschaft und Mbel (DIN Standards Committee Timber and Furniture), Working Commi
6、ttee NA 042-02-15 AA Holzwerk-stoffe Spiegelausschuss zu CEN/TC 112 und ISO/TC 89. Amendments This standard differs from DIN EN 326-2:2010-12 as follows: a) Equation (20) in Subclause 6.4.2 has been modified. The DIN Standard corresponding to the International Standard referred to in this document i
7、s as follows: ISO 2859-1 DIN ISO 2859-1 Previous editions DIN EN 326-2: 2000-10, 2010-12 DIN EN 326-2 Corrigendum 1: 2006-06 National Annex NA (informative) Bibliography DIN ISO 2859-1, Sampling procedures for inspection by attributes Part 1: Sampling schemes indexed by acceptance quality limit (AQL
8、) for lot-by-lot inspection EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 326-2:2010+A1 August 2014 ICS 79.060.01 Supersedes EN 326-2:2010English Version Wood-based panels - Sampling, cutting and inspection - Part 2: Initial type testing and factory production control Panneaux base de bois -
9、Echantillonnage, dcoupe et contrle - Partie 2 : Essai de type initial et contrle de la production en usine Holzwerkstoffe - Probenahme, Zuschnitt und berwachung - Teil 2: Erstprfung des Produktes und werkseigene Produktionskontrolle This European Standard was approved by CEN on 7 August 2010 and inc
10、ludes Amendment 1 approved by CEN on 17 July 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 conc
11、erning 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 in
12、to 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, France,
13、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 KOMITE
14、E 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 326-2:2010+A1:2014 EEN 326-2:2010+A1:2014 (E) 2 Contents Page Foreword 4 1 Scope 5 2 Normative refer
15、ences 5 3 Terms and definitions .5 4 Symbols and indices .7 4.1 Letter symbols (see also EN 326-1:1994) 7 4.2 Indices (see also EN 326-1:1994) .8 5 Initial type testing (ITT) .9 5.1 General 9 5.2 Initial type testing by variables 9 5.2.1 General 9 5.2.2 Sampling of panels 9 5.2.3 Evaluation 10 5.3 I
16、nitial type testing by attributes . 11 5.3.1 Sampling 11 5.3.2 Evaluation 12 6 Factory production control 12 6.1 General . 12 6.2 Sampling 13 6.2.1 General . 13 6.2.2 Dimensional tolerances, squareness and edge straightness 13 6.2.3 Other properties assessed as attributes and not included in 6.2.1 o
17、r 6.2.2 . 13 6.2.4 Sampling and cutting of test pieces . 13 6.3 Factory production control by variables 13 6.3.1 Characteristics 13 6.3.2 Product types 14 6.4 Control of production . 14 6.4.1 General . 14 6.4.2 Factory production control by variables for batch production . 15 6.4.3 Factory productio
18、n control by attributes for batch production . 17 6.4.4 Internal records of an established product 18 6.5 Initial inspection of factory and factory production control (FPC) 19 6.6 Continuous surveillance, assessment and approval of the factory production control . 20 Annex A (informative) Example of
19、 initial type testing by variables Evaluation of bending strength of particleboards (see 5.2) 21 A.1 Example . 21 A.2 Sampling (see 5.1.2) . 21 A.3 Test results, records and evaluation (see 5.2.3 and EN 326-1:1994, Clause 7) 22 Annex B (informative) Factory production control by variables Example: B
20、atch production (see 6.4.2) . 23 B.1 General . 23 B.2 Sampling 23 B.3 Testing . 23 B.4 Calculation and recording of test results of the first sample 23 B.4.1 Example for the case that the first sample of one panel fulfils the panel characteristic requirement . 23 DINEN 326-2:2014-10EN 326-2:2010+A1:
21、2014 (E) 3 B.4.2 Example for the case that the first sample of one panel does not fulfil the panel characteristic requirement . 24 Annex C (informative) Example of initial type testing attributes - Evaluation of bonding quality of plywood (see 6.4.3.1) . 27 C.1 Example 27 C.2 Sampling plan 27 C.3 Sa
22、mpling (see 5.3.1) 27 C.4 Test data and evaluation of bond shear strength and apparent cohesive wood fibre failure percentage . 27 C.4.1 General . 27 C.4.2 First sample . 27 C.4.3 Second sample 29 C.5 Single sampling plan . 29 Annex D (informative) Control of factory production control records - Exa
23、mples of the determination of differences between factory testing and external testing (see 6.6) 30 D.1 General . 30 D.1.1 Use of unconditioned test pieces 30 D.1.2 Paired testing . 30 D.2 Example (1): Swelling in thickness tested according to EN 317 31 D.2.1 Sample of example (1) . 31 D.2.2 Control
24、 of variability 31 D.3 Example (2): Internal bond tested according to EN 319 33 D.3.1 General . 33 D.3.2 Sample of Example (2) 33 D.3.3 Control of variability 33 D.4 Determination of a significant difference between the results from the alternative test procedure and from the standard reference test
25、 method . 34 Annex E (informative) Example of the calculation of a linear correlation (see 6.6) . 36 Annex F (informative) Example of the determination of a significant difference between the results from the alternative test procedure and from the standard reference test method (see 6.6) in accorda
26、nce with EN 13986 40 F.1 General . 40 F.2 Control of variability (see Annex D) 41 F.3 Determination of a significant difference (see Annex D) 42 Bibliography 43 DIN EN 326-2:2014-10 EN 326-2:2010+A1:2014(E)4 Foreword This document (EN 326-2:2010+A1:2014) has been prepared by Technical Committee CEN/
27、TC 112 “Wood-based panels”, the secretariat of which is held by DIN. 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 February 2015, and conflicting national standards shall be withdrawn at the lat
28、est by February 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 identifying any or all such patent rights. This document includes Amendment 1 approved by CEN on 17 July 20
29、14. This document supersedes !EN 326-2:2010“. The start and finish of text introduced or altered by amendment is indicated in the text by tags !“. !This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association.“ A revision of EN 326-2
30、:2000 was necessary in order to adapt this standard to the harmonized European Standard EN 13986:2004. Compared to EN 326-2:2000 the following main changes have been made: a) the procedures of initial type testing as well as of factory production control have been adapted to those specified in EN 13
31、986; b) the terminology has been adapted to EN 13986; c) the specification requirement of the lower 5 % value or the upper 95 % value, respectively, is also fulfilled, if all single 30 mean values comply with the specification limit; d) the procedure of evaluation of linear correlations between test
32、 results has been improved. This standard is one of a series of European Standards dealing with sampling, cutting and inspection of wood-based panels. The other parts of this series are listed in Clause 2 and in the Bibliography. According to the CEN-CENELEC Internal Regulations, the national standa
33、rds 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, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Lux
34、embourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 326-2:2014-10 EN 326-2:2010+A1:2014(E)5 1 Scope This European Standard specifies methods for internal initial type testing (ITT) and internal factory
35、production control (FPC) as well as external control of wood-based panels for their compliance with EN 13986 and other relevant product specifications. However, it may also apply, at the option of the manufacturer, to wood-based panels applied for non-construction purposes. This European Standard is
36、 not applicable for the assessment of compliance with specifications of panels comprised in consignments. In such cases, EN 326-3 applies. For internal factory production control, if required, methods for the assessment of conformity of batches and of production over longer periods are given. For ex
37、ternal control, if required, methods for the initial inspection of a factory and initial type testing of a product, and for the surveillance of the factory production control, are given. In the factory production control small test pieces are used. The statistics of evaluation is based on normal dis
38、tribution. 2 Normative references !The following documents, in whole or in part, are normatively referenced 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 (includi
39、ng any amendments) applies.“ EN 326-1:1994, Wood-based panels Sampling, cutting and inspection Part 1: Sampling and cutting of test pieces and expression of test results EN 13986, Wood-based panels for use in construction Characteristics, evaluation of conformity and marking ISO 8258, Shewhart contr
40、ol charts 3 Terms and definitions For the purpose of this document, the terms and definitions given in EN 326-1:1994 and the following apply. 3.1 acceptable quality level AQL maximum percentage of non-conforming panels that for the purpose of sampling inspection can be considered satisfactory as a p
41、rocess average 3.2 at random sampling of panels in such a way that each panel of the inspection lot has an equal chance of being selected, and cutting of test pieces from a single panel in such a way that each part of the panel has an equal chance of being selected as a test piece 3.3 attribute qual
42、itative panel characteristic which can be taken for a yes or no decision about the conformity of a panel characteristic with the specification requirements DINEN 326-2:2014-10EN 326-2:2010+A1:2014 (E) 6 NOTE An example is given in Annex C. 3.4 batch panels of the same product type produced in a shif
43、t 3.5 defective panel which does not meet the required specification limit of the relevant characteristic 3.6 inspection body body which is responsible for external control 3.7 inspection by attributes inspection whereby either the unit of product is classified simply as conforming or non-conforming
44、, or the number of nonconformities in the unit of product is counted, with respect to a given requirement or set of requirements 3.8 inspection by variables inspection whereby the conformity of a panel characteristic can be measured on a continuous scale 3.9 inspection lot (for factory control) port
45、ion of production which is presented for sampling and inspection, consisting of panels of the same type, normally within the same thickness range, coming from the same production line and manufactured under essentially the same conditions 3.10 inspection lot size N number of panels in one inspection
46、 lot 3.11 lower specification limit L value required by the EN specification that 95 % of the panels should have values greater than or equal to 3.12 panel piece of wood-based sheet material large enough to permit the cutting of test pieces 3.13 percent defective extent of non-conformity of a panel
47、product expressed by percentage defective panels in the total number of panels inspected 3.14 production site single production line 3.15 product type panel type, irrespective of thickness, as defined in the relevant EN specification DINEN 326-2:2014-10EN 326-2:2010+A1:2014(E)7 3.16 reference popula
48、tion wood-based panels for which the relationship between test values is relevant 3.17 quality characteristic characteristic that is essential for the evaluation of a product or product type in accordance with a relevant EN specification 3.18 sample collection of panels which are drawn from an inspection lot NOTE Unless otherwise agreed, the panels of the sample are drawn at random. 3.19 test piece piece of panel cut to the size required for testing a specific characteristic 3.20 test value xijsingle value or measurement of a
