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1、INTERNATIONAL STANDARD ISO 2426-3 First edition 2000-12-01 Reference number ISO 2426-3:2000(E) ISO 2000 Plywood Classification by surface appearance Part 3: Softwood Contreplaqu Classification selon laspect des faces Partie 3: Bois rsineux Copyright International Organization for Standardization Pro
2、vided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/24/2007 21:48:31 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 2426-3:2000(E) ii ISO 2000 All rights reserved PDF disclaimer This PDF file may contain embedded typefa
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5、zed for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO 2000 All rights reserved. Unless otherwise specified, no p
6、art of this publication may be reproduced or utilized in any form or by any means, elec- tronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs mem- ber body in the country of the requester. ISO copyright office Case pos
7、tale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.ch Web www.iso.ch Printed in Switzerland Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/24/200
8、7 21:48:31 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 2426-3:2000(E) ISO 2000 All rights reserved iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing
9、 International Standards is normally carried out through ISO technical com- mittees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in lia
10、i- son with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Draft Internati
11、onal Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this part of ISO 2426
12、 may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. International Standard ISO 2426-3 was prepared by Technical Committee ISO/TC 89,Wood-based panels, Sub- committee SC 3,Plywood. This first edition of ISO 2426-3, together with ISO 2
13、426-1 and ISO 2426-2, cancels and replaces ISO 2426:1974, of which it constitutes a technical revision. ISO 2426 consists of the following parts, under the general titlePlywood Classification by surface appearance: Part 1: General Part 2: Hardwood Part 3: Softwood Copyright International Organizatio
14、n for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/24/2007 21:48:31 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright International Organization for Standardization Provided by IHS under lic
15、ense with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/24/2007 21:48:31 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARDISO 2426-3:2000(E) ISO 2000 All rights reserved 1 Plywood Classification by surface appearance Part 3: Soft
16、wood 1Scope This part of ISO 2426 specifies the nature and limits of characteristics inherent in wood and manufacturing defects enabling the visual assessment of the plywood for allocation to an appearance class. This part of ISO 2426 applies to plywood, the surface veneers of which are made from so
17、ftwood species. It does not apply to overlaid panels. 2Normative reference The following normative document contains provisions which, through reference in this text, constitute provisions of this part of ISO 2426. For dated references, subsequent amendments to, or revisions of, any of these publica
18、tions do not apply. However, parties to agreements based on this part of ISO 2426 are encouraged to investigate the possi- bility of applying the most recent edition of the normative document indicated below. For undated references, the lat- est edition of the normative document referred to applies.
19、 Members of ISO and IEC maintain registers of currently valid International Standards. ISO 2426-1,Plywood Classification by surface appearance Part 1: General. 3Classification by surface appearance 3.1Appearance classes Assessment of characteristics and defects for detemination of appearance class s
20、hall be carried out in accordance with ISO 2426-1. Surface classification shall be based on the permissible characteristics and defects within each of the appearance classes as specified in 3.2. 3.2Permissible characteristics and defects 3.2.1General Each surface shall be indivually assigned to one
21、of the appearance classes E, I, II, III or IV, as defined by the permis- sible characteristics according to Table 1 and permissible defects according to Table 2. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/997254
22、5001 Not for Resale, 04/24/2007 21:48:31 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 2426-3:2000(E) 2 ISO 2000 All rights reserved 3.2.2Characteristics inherent in wood Classification according to characteristics inherent in wood is given in Table 1. Table 1 Categor
23、ies of characteristics Appearance class EIIIIIIIV 3.2.2.1Pin knotsa Practically absent permittedPermitted 3.2.2.2Sound intergrown knotsPermitted up to an individual diameter of:Permitted, but see Note provided their cumulative diameter does not exceed Such knots may have splits provided they are ver
24、y slightslight 3.2.2.3Unsound or non-adhering knots and knot holes Permitted up to an individual diameter of:Permitted, but see Note if filled and up to a number of if unrepaired if filled and up to a number of 3.2.2.4SplitsOpenPermitted if less than:Length unlimited 1/101/31/2 of panel length up to
25、 an individual width of: and up to a number of: unlimited of panel width if properly filledAll splits greater thanin width to be filled ClosedPermitted 3.2.2.5Abnormalities due to insects, marine borers and parasitic plants Not permitted Not permittedMarks of parasitic plants not permitted. Insects
26、and marine borer holes permitted up to a: Permitted, but see Note diameter of vertically to the plane of the panel up to a number of width ofand length ofup to a number of 3.2.2.6Resin pockets and inbarkNot permittedPermitted up to a width of:Permitted, but see Note if properly filled Resin streaksN
27、ot permittedPermitted if slightPermitted 3.2.2.7Irregularities in the structure of the wood Practically absent PermittedPermitted if very slightif slight 3.2.2.8Discoloration which is not wood- destroying Permitted if low contrastPermitted 3.2.2.9Fungal decay wood-destroying Not permittedNot permitt
28、ed 3.2.2.10Other characteristicsPractically absent To be considered under the category which they most closely resemble NOTECharacteristics inherent to wood are permitted provided that they do not impair the serviceability of the panel. a Pin knots: sound intergrown knots of no more thandiameter. 3/
29、m2 15 mm 30 mm/m2 50 mm60 mm 6 mm 2/m2 5 mm 25 mm 6/m2 40 mm 3 mm10 mm15 mm25 mm 3/m3/m3/m 2 mm 3 mm 10/m2 15 mm 60 mm 3/m2 6 mm40 mm 3 mm Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04
30、/24/2007 21:48:31 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 2426-3:2000(E) ISO 2000 All rights reserved 3 3.2.3Manufacturing defects Classification according to manufacturing defects is given in Table 2. Table 2 Categories of defect Appearance class EIIIIIIIV 3.2.
31、3.1Open joints Not permittedNot permitted Permitted up to a width of: and up to a number of: unlimited of panel width with joints filled if more than in width unfilledunfilled 3.2.3.2OverlapsPermitted up to a number of and up to length Permitted up to a number of Permitted but see Note 3.2.3.3Bliste
32、rsNot permitted 3.2.3.4Hollows, imprints and bumpsPermitted if slightPermitted 3.2.3.5RoughnessPermitted if slightPermitted 3.2.3.6Sanding through Not permitted Permitted up to an extent of: of panel surface but see Note 3.2.3.7Glue penetrationPermittedPermitted, but see Note if slight and occasiona
33、l up to an extent of of the panel surface 3.2.3.8Foreign particlesNot permittedNot permittedFerrous particles not permitted 3.2.3.9Repairs:Practically without defects Permitted if properly made and tightly filled up to number of: 1)Patches 2)Shims unlimited 3)Synthetic fillersNot permittedNot permit
34、tedPermitted within limits of the category which it most closely resembles 3.2.3.10 Defects at the panel edges due to sanding or sawing Practically without defects Permitted up to:Permitted, but see Note from the edge from the edge from the edge 3.2.3.11 Other defectsTo be considered under the categ
35、ory which they most closely resemble NOTEManufacturing defects are permitted provided that they do not impair the serviceability of the panel. 3 mm10 mm25 mm 1/m2/m 1 mm 1/m2 100 mm 2/m2 1 %5 % 5 % 5/m2 2 mm5 mm5 mm Copyright International Organization for Standardization Provided by IHS under licen
36、se with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/24/2007 21:48:31 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 2426-3:2000(E) 4 ISO 2000 All rights reserved Bibliography 1 ISO 1096,Plywood Classification. 2 ISO 2074,Plywood Vocabulary. 3
37、ISO 2426-2,Plywood Classification by surface appearance Part 2: Hardwood. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/24/2007 21:48:31 MDTNo reproduction or networking permitted with
38、out license from IHS -,-,- Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/24/2007 21:48:31 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 2426-3:2000(E) I
39、CS 79.060.10 Price based on 4 pages ISO 2000 All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/24/2007 21:48:31 MDTNo reproduction or networking permitted without license from IHS -,-,-