EN 324-1-1993 en Wood-Based Panels - Determination of Dimensions of Boards Part 1 Determination of Thickness Width and Length《木基板 板尺寸测定 第1部分 厚度 宽度和长度测定》.pdf

1、CEN EN*32Y-L 93 m 3YOY589 OOYl182b I122 m EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 324-1 February 1993 UDC 674.815: 531.71 Descriptors: Wood-based panel, fibreboard, particleboard, plywood, OSB, cement-bonded particleboard, test method, dimensions of boards, thickness, width, length Engl

2、ish version Wood-based panels - Determination of dimensions of boards Part 1 : Determination of thickness, width and length Panneaux base de bois - Dtermination des dimensions des panneaux - Partie 1: Dtermination de lpaisseur, de la largeur et de la longueur Holzwerkstoffe - Bestimmung der Plattenm

3、aBe - %il 1: Bestimmung der Dicke, Breite und Lnge This European Standard was approved by CEN on 1992-12-15. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterat

4、ion. Up-to-date lists and bibliographical references concerning such national standards 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 translat

5、ion under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg,

6、Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels O 1993 Copyright reserved to CEN members Ref. No. EN 324-1 :

7、 1993 E CEN ENs324-II 73 3404589 004L827 Ob9 M Page 2 EN 3241 : 1993 Foreword This European Standard was prepared by Working Group 4 Common test methods (Secretariat: United Kingdom) of Rchnical Committee CEN/TC 112 Wood-based panels (Secretariat: Germany). The text is based on IS0 9426-1 : 1989 whi

8、ch has been elaborated with European participation. This standard is one of a series of standards specifying methods of test for determining dimensions and properties of wood-based panels. No existing European Standard is superseded. This European Standard shall be given the status of national stand

9、ard, either by publication of an identical text or by endorsement, at the latest by August 1993, and conflicting national standards shall be withdrawn at the latest by December 1994. In accordance with the Common CENKENELEC Rules the foilowing countries are bound to implement this European Standard:

10、 Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Contents 1 Scope 2 Normative references 3 Principle 4 Sampling 5 Moisture content at time of measurement 6 Conditioning 7 A

11、pparatus 8 Procedure 9 Expression of results 10 Rst report Annex A (informative) Bibliography Page 3 3 3 3 CEN EN*324-1 73 m 3404589 0041828 TT5 m 1 Scope This European Standard specifies methods for measuring the thickness, width and length of wood-based panels. It applies to whole flat boards. The

12、 methods for the determination of squareness and edge straightness are specified in EN 324-2. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and t

13、he publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard, only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN

14、322 EN 326- 1 Wood-based panels - Determination of moisture content Wood- based panels - Sampling, cutting and inspection Part 1: Sampling and cutting of test pieces and expression of test results1) 3 Principle Thickness, length and width of full size boards are determined by linear measurement. 4 S

15、ampling Sampling of panels shall be in accordance with EN 326-1. 5 Moisture content at time of measurement Normally the dimensions of boards are measured in the as-received state. If necessary the moisture content of the boards shall be determined in accordance with EN 322. 6 Conditioning If necessa

16、ry, the boards shall be conditioned to constant mass in an atmosphere with a relative humidity of (65 f 5) % and a temperature of (20 f 2) OC. Constant mass is considered to be reached when the results of two successive weighing operations, carried out at an interval of 24 h, do not differ by more t

17、han 0,l % of the mass of the board. Page 3 EN 3241 : 1993 7 Apparatus 7.1 Instrument for thickness measurement Micrometq or similar measuring instrument, having flat and parallel circular measuring surfaces of (16 f 1) mm diameter and an operating force of 4 N f 1 N. The graduation of the apparatus

18、shall allow a reading to 0,05 mm. 7.2 Measuring instrument for length and width measurement Steel measuring tape, accurate to 1 mm. 8 Procedure 8.1 Determination of thickness of boards Measure the thickness approximately 50 mm from the edges, at points located in each corner and in the middle of eac

19、h side, i.e. at eight points in all (see figure i), to an accuracy of 1 % of the thickness but to not less than 0,l mm. For measuring the thickness, apply the measuring surfaces of the instrument slowly to the panel surface. 8.2 Determination of length and width of boards Measure both the length and

20、 width of each board along two lines parallel to and at a distance of 100 mm from the edges (see figure i), to an accuracy of O, 1 % but not less than 1 mm. 9 Expression of results 9.1 Thickness For each board tested, the arithmetic mean of the measurements shall be calculated and expressed to the n

21、earest 0,l mm. 9.2 Length and width For each board tested, the arithmetic mean of the measurements shall be calculated and expressed for the length and the width to the nearest 1 mm. 10 Test report As described in EN 326- 1. )At present at the draft stage Page 4 EN 3241 : 1993 CEN EN+324-L 93 340458

22、9 0041829 931 -b +- I e- Figure l. Points of measurement of thickness - , length and width + of a board CEN ENx324-1 93 m 3404589 0041830 b53 m I l l I Page 5 EN 3241 : 1993 Annex A (informative) Bibliography EN 309 EN 313-1 Particleboards - Definition and cha 1989 Wood-based panels - Determination of dimensions Part 1: Determination of thickness, width and length EN 316 Fibreboards - Definition, EN 324-2 Wood-based panels - -)At present at the draft stage