1、CEN EN*317 93 W 3404589 0041778 b4T W EUROPEAN STANDARD EN 317 NORME EUROPENNE EUROPISCHE NORM February 1993 UDC 674.03:674.815:674.817:620.192.53 Descriptors: Particleboard, fibreboard, cement-bonded particleboard, test method, swelling in thickness, immersion test English version Particleboards an
2、d fibreboards - Determination of swelling in thickness after immersion in water Panneaux de particules et panneaux de fibres - Dtermination du gonflement en paisseur aprs immersion dans leau Spanplatten und Faserplatten - Bestimmung der Dickenquellung nach Wasserlagerung This European Standard was a
3、pproved by CEN on 1992-12-15. CEN members are bound to comply with the CENICENELEC 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 concerning such national
4、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 translation under the responsibility of a CEN member into its own language and notifie
5、d 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, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
6、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 317 : 1993 E CEN EN*3L7 93 = 3404589 0043779 58b Page 2 EN 317 : 1993 Foreword This E
7、uropean Standard was prepared by Working Group 1 Particle-boards (Secretariat: Germany) and Working Group 3 Fibreboards (Secretariat: Italy) of Rchnical Committee CEN/TC 112 Wood-based panels (Secretariat: Germany). This standard is one of a series specifying methods of test for determining the prop
8、erties of particleboards and fibreboards. No existing European Standard is superseded. 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 1993, and conflicting national standards shall be with
9、drawn at the latest by December 1994. In accordance with the CENKENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain,
10、 Sweden, Switzerland, United Kingdom. Contents 1 Scope 2 Normative references 3 Principle 4 Apparatus 5 Test pieces 6 Procedure 7 Expression of results 8 kstreport Annex A (informative) Bibliography Page 3 3 3 3 3 3 4 4 5 CEN EN*317 93 m 3404589 0041780 2TB m 1 Scope This European Standard specifies
11、 a method of determining the swelling in thickness of flat-pressed or drum-pressed particleboards, fibreboards, and cement-bonded particleboards. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references a
12、re cited at the appropriate places in the text and the 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 last ed
13、ition of the publication referred to applies. EN 325 Wood-based panels Determination of dimensions of test pieces EN 326-1 Wood-based panels Sampling, cutting and inspection Part 1: Sampling and cutting of test pieces and expression of test results1) 3 Principle Swelling in thickness is determined b
14、y measuring the increase in thickness of the test piece after complete immersion in water. 4 Apparatus 4.1 Micrometer Micrometer, according to EN 325. 4.2 Water bath A thermostatically controlled water bath, capable of maintaining a temperature of (20 f 1) OC and in which the test pieces can be main
15、tained in the conditions specified in 6.2. 5 Test pieces 5.1 Sampling Sampling and cutting of the test pieces shall be carried out according to EN 326-1. 5.2 Dimensions The test pieces shall be square with a side length of (50 f 1) mm. Page 3 EN 317 : 1993 5.3 Conditioning The test pieces shall be c
16、onditioned to constant mass in an atmosphere with a mean relative humidity of (65 I 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 than 0,l % of the mas
17、s of the test piece. 6 Procedure 6.1 Thickness measurement The thickness of each test piece shall be measured to an accuracy of f 0,Ol mm at the intersection of the diagonals, according to EN 325 (figure 1). 50 ? 1 P I Dimensions in millimetres Figure 1. lkst piece for the measurement of swelling in
18、 thickness 6.2 Immersion Immerse the test pieces with their faces vertical in clean, still water, having a pH of 7 f 1 and a temperature of (20 f 1) OC. This temperature shall be maintained throughout the test period. During the test, the test pieces shall be separated from each other and from the b
19、ottom and the sides of the water bath. The upper edges of the test pieces shall be covered by (25 f 5) mm of water throughout the test. The water shall be changed after each test. The immersion times shall be as specified by the individual standards for the different board types. 6.3 Further procedu
20、re After the immersion time has elapsed, take the test pieces out of the water, remove excess water and measure the thickness of each test piece (6.1). )At present in the draft stage. CEN EN*3L7 93 3404589 0041782 070 Page 5 EN 317 : 1993 Annex A (informative) Bibliography EN 300 EN 309 Wood particl
21、eboards Particleboards: Oriented Strand Boards (OSB) Definition and classification EN 312-2 Particleboards Specifkations Part 2: Requirements for general purpose boards) EN 312-3 Particleboards Specifications Part 3: Requirements for boards for use in intdr fitments (including furniture) in dry cond
22、itions1) EN 312-4 Particleboards Smcifications Part 4: Requirements for load-bearing boards for use in dry conditions) EN 312-5 Particleboards Spec.Lfications Part 5: Requirements for load-bearing boards for use in humid conditions1) EN 312-6 EN 312-7 EN 316 EN 622-2 EN 622-3 EN 622-4 EN 622-5 EN 63
23、3 EN 634-1 Particleboards Specifications Part 6: Requirements for heavy-duty load-bearing boards for use in dry conditions) Partickboards Specifications Part 7: Requirements for heavy-duty load bearing boards for use in humid conditions) Wood fibreboards Definition, classification and symbols Fibreb
24、oards Specifications Part 2: Requirements for hardboards) Fibre boards Spe&fications Part 3: Requirements for medium boards) Fibreboards Specifications Part 4: Requirements for softboards) Fibreboards Specifications Part 5: Requirements for dry process fibreboardsl) Cement- bonded particleboards Definition and cldfication) Cement-bonded particleboards Specifications art i: General requirements)
