1、BSI Standards Publication Lightweight Particleboards Specifications PD CEN/TS 16368:2014National foreword This Published Document is the UK implementation of CEN/TS 16368:2014. The UK committee voted negatively against this Technical Specification on the basis that the formaldehyde testing requireme
2、nts are out of line with those of Annex B of the harmonised standard EN 13986. It is the view of the UK committee that there should be derived test method limits for formaldehyde i.e. EN 120 and EN 717-2. In addition, there should be a formaldehyde class E2. Both of which will bring it in line with
3、Annex B of EN 13986. The UK participation in its preparation was entrusted to Technical Committee B/541, Wood based panels. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of
4、a contract. Users are responsible for its correct application. The British Standards Institution 2014. Published by BSI Standards Limited 2014 ISBN 978 0 580 76829 3 ICS 79.060.20 Compliance with a British Standard cannot confer immunity from legal obligations. This Published Document was published
5、under the authority of the Standards Policy and Strategy Committee on 30 April 2014. Amendments/corrigenda issued since publication Date Text affected PUBLISHED DOCUMENT PD CEN/TS 16368:2014 TECHNICAL SPECIFICATION SPCIFICATION TECHNIQUE TECHNISCHE SPEZIFIKATION CEN/TS 16368 March 2014 ICS 79.060.20
6、 English Version Lightweight Particleboards - Specifications Panneaux de particules lgers - Spcifications Leichte Spanplatten - Anforderungen This Technical Specification (CEN/TS) was approved by CEN on 13 January 2014 for provisional application. The period of validity of this CEN/TS is limited ini
7、tially to three years. After two years the members of CEN will be requested to submit their comments, particularly on the question whether the CEN/TS can be converted into a European Standard. CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make
8、the CEN/TS available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached. CEN members are the national standards bod
9、ies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, S
10、pain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE 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 worldw
11、ide for CEN national Members. Ref. No. CEN/TS 16368:2014 E PD CEN/TS 16368:2014CEN/TS 16368:2014 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions .5 4 Classification of boards 5 5 General requirements for all board types .5 6 Requirements .6 7 Requirements fo
12、r general purpose lightweight boards for use in dry conditions (Type LP1) .6 8 Requirements for general purpose (including furniture) lightweight boards for use in dry conditions (Type LP2) .6 9 Supplementary properties 7 10 Verification of compliance 7 10.1 General 7 10.2 External control 7 10.3 Fa
13、ctory production control .8 11 Marking .8 Bibliography 9 PD CEN/TS 16368:2014CEN/TS 16368:2014 (E) 3 Foreword This document (CEN/TS 16368:2014) has been prepared by Technical Committee CEN/TC 112 “Wood-based panels”, the secretariat of which is held by DIN. Attention is drawn to the possibility that
14、 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. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to
15、announce this Technical Specification: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal
16、, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. PD CEN/TS 16368:2014CEN/TS 16368:2014 (E) 4 1 Scope This European Technical Specification specifies the requirements for uncoated particleboards for use in dry conditions in non load-bearing applications with d
17、ensity below 600 kg/m 3 . This Technical Specification applies to particleboard which is mostly homogenous and continuous in its composition and which does not contain hollow spaces, chambers or other type of cavities which can be encountered as honeycombs in sandwich panels or as tubes in extruded
18、boards. This Technical Specification does not give requirements for extruded particleboards (see EN 14755), flaxboards (see EN 15197) and sandwich panels. NOTE Typical applications for lightweight boards are in furniture and non-structural applications e.g. in doors, packaging. 2 Normative reference
19、s 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 (including any amendments) applies. EN 31
20、0, Wood-based panels Determination of modulus of elasticity in bending and of bending strength EN 311, Wood-based panels Surface soundness Test method EN 317, Particleboards and fibreboards Determination of swelling in thickness after immersion in water EN 318, Wood-based panels Determination of dim
21、ensional changes associated with changes in relative humidity EN 319, Particleboards and fibreboards Determination of tensile strength perpendicular to the plane of the board EN 322, Wood-based panels Determination of moisture content EN 323, Wood-based panels Determination of density EN 324-1, Wood
22、-based panels Determination of dimensions of boards Part 1: Determination of thickness, width and length EN 324-2, Wood-based panels Determination of dimensions of boards Part 2: Determination of squareness and edge straightness EN 326-1, Wood-based panels Sampling, cutting and inspection Part 1: Sa
23、mpling and cutting of test pieces and expression of test results EN 326-2, Wood-based panels Sampling, cutting and inspection Part 2: Initial type testing and factory production control EN 326-3, Wood-based panels Sampling, cutting and inspection Part 3: Inspection of an isolated lot of panels EN 71
24、7-1, Wood-based panels Determination of formaldehyde release Part 1: Formaldehyde emission by the chamber method ISO 3340, Fibre building boards Determination of sand content PD CEN/TS 16368:2014CEN/TS 16368:2014 (E) 5 3 Terms and definitions For the purposes of this document, the following terms an
25、d definitions apply. 3.1 lightweight particleboard particleboard, manufactured under pressure and heat from particles of wood (wood flakes, chips, shavings, sawdust and similar) and/or other lignocellulosic material in particle form (flax shives, hemp shives, bagasse fragments and similar) with the
26、addition of an adhesive, of mean density below 600 kg/m 33.2 dry conditions conditions corresponding to service class 1 of EN 1995-1-1 which is characterised by a moisture content in the material corresponding to a temperature of 20 C and a relative humidity of the surrounding air only exceeding 65
27、% for a few weeks per year 4 Classification of boards Two types of general purpose lightweight boards for use in dry conditions LP1 and LP2 are defined. 5 General requirements for all board types Particleboards shall comply with the general requirements as listed in Table 1 when dispatched from the
28、producing factory. For certain types or uses of particleboards (see specific standards for board types and performance standards), or in the case of dispatch in cut sizes, or further machined (e.g. tongued and grooved, and similar), special tolerances for properties No. 1, 2 and 3 may be agreed upon
29、. Table 1 General requirements at dispatch No Property Test method Requirement 1 aTolerances on nominal dimensions EN 324-1 Thickness (sanded) 0,3 mm within and between boards Thickness (unsanded) 0,3 mm + 1,7 mm within and between boards Length and width 5 mm 2 aEdge straightness tolerance EN 324-2
30、 1,5 mm per m 3 aSquareness tolerance EN 324-2 2 mm per m 4 Moisture content EN 322 5 % to 13 % 5 aTolerance on the mean density within a board EN 323 10 % 6 bFormaldehyde release EN 717-1 Class E1: EN 717-1 Release 0,124 mg/m 3air aThese values are characterized by a moisture content in the materia
31、l corresponding to a relative humidity of 65 % and a temperature of 20 C. bFor factory production control, correlations can be established between EN 717-1 and derived test methods such as EN 120. PD CEN/TS 16368:2014CEN/TS 16368:2014 (E) 6 6 Requirements The requirements in Table 2 and Table 3 shal
32、l be met by 5 percentile values based on the mean values for individual boards and calculated in accordance with EN 326-1, they shall be equal to or greater than the specification values. The values in Table 2 and Table 3 for both bending strength and modulus of elasticity shall apply to test result
33、s obtained in any direction in the plane of the panel. 7 Requirements for general purpose lightweight boards for use in dry conditions (Type LP1) This clause specifies the requirements, in addition to those specified in Clause 5, for general purpose lightweight boards for use in dry conditions. Ther
34、efore, boards of this type shall comply with the requirements given in Table 1 and Table 2. Table 2 General purpose lightweight boards LP1 for use in dry conditions Requirements for specified mechanical properties Property Test method Unit Requirement Thickness range (mm, nominal) 6 to 13 13 to 20 2
35、0 to 25 25 to 32 32 to 40 40 Bending strength EN 310 N/mm 24,0 3,5 3,0 2,5 2,0 2,0 Modulus of elasticity in bending EN 310 N/mm 2550 500 475 450 400 375 Internal bond EN 319 N/mm 20,28 0,24 0,20 0,17 0,14 0,14 NOTE The values are characterized by a moisture content in the material corresponding to a
36、 relative humidity of 65 % and a temperature of 20 C. 8 Requirements for general purpose (including furniture) lightweight boards for use in dry conditions (Type LP2) This clause specifies the requirements, in addition to those specified in Clause 5, for general purpose lightweight boards for use in
37、 dry conditions. Therefore, boards of this type shall comply with the requirements given in Table 1 and Table 3. PD CEN/TS 16368:2014CEN/TS 16368:2014 (E) 7 Table 3 General purpose (including furniture) lightweight boards LP2 for use in dry conditions Requirements for specified mechanical properties
38、 Property Test method Unit Requirement Thickness range (mm, nominal) 6 to 13 13 to 20 20 to 25 25 to 32 32 to 40 40 Bending strength EN 310 N/mm 28,0 7,0 6,0 5,0 4,5 4,0 Modulus of elasticity in bending EN 310 N/mm 21 000 950 900 850 750 650 Internal bond EN 319 N/mm 20,35 0,30 0,25 0,20 0,17 0,17 N
39、OTE The values are characterized by a moisture content in the material corresponding to a relative humidity of 65 % and a temperature of 20 C. 9 Supplementary properties For certain applications, information on some of the properties listed in Table 4 can be required. On request, this information sh
40、all be supplied by the board manufacturer and in this case shall have been derived using the EN test methods listed in Table 4. Table 4 Supplementary properties and test methods Property Test method Density EN 323 Dimensional changes EN 318 Surface soundness EN 311 Swelling in thickness EN 317 Sand
41、content ISO 3340 10 Verification of compliance 10.1 General Verification of compliance with this Technical Specification shall be carried out using the test methods listed in Table 1 to Table 4. 10.2 External control External control of the factory, if any, shall be carried out according to EN 326-2
42、. Inspection of isolated lots shall be carried out according to EN 326-3. PD CEN/TS 16368:2014CEN/TS 16368:2014 (E) 8 In the case of formaldehyde potential, however, for both external control and inspection of an isolated lot of panels, the respective requirement set out in Table 1 shall be met by t
43、he average value of at least three boards controlled. Additionally, no individual board is allowed to exceed an upper tolerances limit of + 10 %. 10.3 Factory production control Factory production control shall be carried out according to EN 326-2. The properties listed in the Tables 2 to 3, shall b
44、e controlled using intervals between tests not exceeding the intervals given in Table 5. Sampling shall be carried out at random. Alternative test methods and/or unconditioned test pieces may be used if a valid correlation to the specified test methods can be proven (see EN 326-2). The intervals bet
45、ween tests given in Table 5 are related to a production under statistical control. Table 5 Maximum intervals between tests for each production line Property Maximum interval between tests Moisture content and density 8 h per type of board Formaldehyde release a24 h per type of board Class E1 All oth
46、er properties listed in Table 1 8 h per type and thickness range All other properties listed in Tables 2 to 4 8 h baAlternative test methods may be used provided a correlation with EN 717-1 is established. Certain types of particleboards are known to release little or no formaldehyde. In these cases
47、, the test intervals may be increased. However, it remains the responsibility of the manufacturer or inspection agency, if any, to ensure compliance with this Technical Specification. bIf several thickness ranges are produced in one 8 h shift, the internal control shall be organized so that at least
48、 one board of each thickness range is tested in one weeks production 11 Marking The marking and the accompanying information shall be placed on the accompanying commercial documents. Part of the marking may also be placed on the product itself, on a label attached to it or on the packaging. The mark
49、ing shall contain at least the following information in this sequence: a) the manufacturers name, trade mark, or identification mark; b) the number of this European Technical Specification CEN/TS 16368; c) the panel type LP1 or LP2; d) the nominal thickness; e) the formaldehyde class E1; f) the batch number, or the production week and year. PD CEN/TS 16368:2014CEN/TS 16368:2014 (E) 9 Bibliography 1 EN 120, Wood based panels Determination of formaldehyde content Extraction method called t
