EN 312:2003

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Spanplatten - AnforderungenPanneaux de particules - ExigencesParticleboards - Specifications79.060.20Fibre and particle boardsICS:Ta slovenski standard je istoveten z:EN 312:2003SIST EN 312:2004en01-januar-2004SIST EN 312:2004SLOVENSKI
STANDARDSIST EN 312-5:1998SIST EN 312-6:1997SIST EN 312-7:1998SIST EN 312-4:1997SIST EN 312-1:1997SIST EN 312-2:1997SIST EN 312-3:19971DGRPHãþD



SIST EN 312:2004



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 312August 2003ICS 79.060.20Supersedes EN 312-1:1996, EN 312-2:1996,EN 312-3:1996, EN 312-4:1996, EN 312-5:1997,EN 312-6:1996 and EN 312-7:1997English versionParticleboards - SpecificationsPanneaux de particules - ExigencesSpanplatten - AnforderungenThis European Standard was approved by CEN on 16 May 2003.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and UnitedKingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2003 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 312:2003 ESIST EN 312:2004



EN 312:2003 (E)2Contents pageForeword.31Scope.42Normative references.43Classification of boards.54General requirements for all board types.55Requirement values.66Requirements for general purpose boards for use in dry conditions (Type P1).77Requirements for boards for interior fitments (including furniture) for use in dry conditions(Type P2).78Requirements for non load-bearing boards for use in humid conditions (Type P3).88.1General.88.2Mechanical and swelling properties.88.3Moisture resistance.89Requirements for load-bearing boards for use in dry conditions (Type P4).910Requirements for load-bearing boards for use in humid conditions (Type P5).1010.1General.1010.2Mechanical and swelling properties.1010.3Moisture resistance.1111Requirements for heavy duty load-bearing boards for use in dry conditions (Type P6).1212Requirements for heavy duty load-bearing boards for use in humid conditions (Type P7).1312.1General.1312.2Mechanical and swelling properties.1312.3Moisture resistance.1413Supplementary properties.1414Verification of compliance.1514.1General.1514.2External control.1514.3Factory production control.1515Marking.16Annex A (normative)
Voluntary colour coding system for particleboards.17SIST EN 312:2004



EN 312:2003 (E)3ForewordThis document (EN 312:2003) has been prepared by Technical Committee CEN/TC 112 “Wood-based panels”, thesecretariat 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 orby endorsement, at the latest by February 2004, and conflicting national standards shall be withdrawn at the latestby February 2004.This document supersedes EN 312-1:1996, EN 312-2:1996, EN 312-3:1996, EN 312-4:1996, EN 312-5:1997,EN 312-6:1996 and EN 312-7:1997. The following modifications have been made:a)The seven parts of the standard have been combined.b)The annexes in EN 312-1:1996 with A-deviations for formaldehyde emission have been deleted. The formal-dehyde classes according to EN 13986 have been taken into account in Table 1 and Table 13.c)A new grade of board type P3 has been introduced and the existing types P2 and P3 have been renamed toP1 and P2.d)The requirements for bending strength and modulus of elasticity in bending of class P4 have been modified inpart.e)The requirements for swelling in thickness after cyclic test for some thickness classes have been modified forboards of type P5 and P7.f)The restrictions for adhesives for moisture resistant boards according to option 2 have been deleted.Annex A is normative.This document includes as bibliography.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following coun-tries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,Slovakia, Spain, Sweden, Switzerland and the United Kingdom.SIST EN 312:2004



EN 312:2003 (E)41 ScopeThis European Standard specifies the requirements for resin-bonded unfaced particleboards.NOTE 1This standard will be called up in EN 13986 for construction applications.The values listed in this standard relate to product properties but they are not characteristic values to be used indesign calculations.NOTE 2Such characteristic values (e. g. for use in design calculation in ENV 1995-1-1) are given either in EN 12369-1 orderived by testing according to EN 789, EN 1058 and ENV 1156.Additional information on supplementary properties for certain applications is also given.NOTE 3Particleboards in accordance with this standard may be referred to as P1 to P7-boards.NOTE 4A new grade of board type P3 has been included and is intended for use as a non load-bearing board for use inhumid conditions.Boards of type P4 to P7 are intended for use in design and construction of load-bearing or stiffening building elements, e. g.walls, flooring, roofing and I-beams (see EN V 1995-1-1 and/or performance standards).This standard does not give requirements for Oriented Strand Boards (OSB); these are set out in EN 300.This standard does not apply to extruded particleboards.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).EN 120, Wood-based panels — Determination of formaldehyde content — Extraction method called the perforatormethod.EN 310, 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 dimensional changes associated with changes in relative humid-ity.EN 319, Particleboards and fibreboards — Determination of tensile strength perpendicular to the plane of theboard.EN 321, Wood-based panels — Determination of moisture resistance under cyclic test conditions.EN 322, Wood-based panels — Determination of moisture content.EN 323, Wood-based panels — Determination of density.EN 324-1, Wood-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 squarenessand edge straightness.SIST EN 312:2004



EN 312:2003 (E)5EN 326-1, Wood-based panels — Sampling, cutting and inspection — Part 1: Sampling and cutting of test piecesand expressions of test results.EN 326-2, Wood-based panels — Sampling, cutting and inspection — Part 2: Quality control in the factory.EN 326-3, Wood-based panels — Sampling, cutting and inspection — Part 3: Inspection of a consignment of pan-els.ENV 717-1, Wood-based panels — Determination of formaldehyde release — Part 1: Formaldehyde emission bythe chamber method.EN 1087-1, Particleboards — Determination of moisture resistance — Part 1: Boil test.EN 12871, Wood-based panels — Performance specifications and requirements for load-bearing boards for use infloors, walls and roofs.EN 13986, Wood-based panels for use in construction — Characteristics, evaluation of conformity and marking.ISO 3340, Fibre building boards — Determination of sand content.3 Classification of boardsSeven types of boards are classified and are distinguished as follows:P1General purpose boards for use in dry conditionsP2Boards for interior fitments (including furniture) for use in dry conditionsP3Non load-bearing boards for use in humid conditions1)P4Load-bearing boards for use in dry conditionsP5Load-bearing boards for use in humid conditions1)P6Heavy duty load-bearing boards for use in dry conditionsP7Heavy duty load-bearing boards for use in humid conditions1)4 General requirements for all board typesParticleboards shall comply with the general requirements as listed in table 1 when dispatched from the productionfactory. For certain uses of particleboards (see performance standard EN 12871), special tolerances are requiredfor the dimensional properties listed under No. 1. In the case of dispatch in cut sizes, or of further machined boards(tongued and grooved, and similar), special tolerances for properties No. 1, 2 and 3 may be agreed upon.
1)Humid conditions are defined in terms of service class 2 of ENV 1995-1-1 which is characterized by a moisture content inthe material corresponding to a temperature of 20 °C and the relative humidity of the surrounding air only exceeding 85 %for a few weeks per year. Boards of this type are suitable for use in biological hazard classes 1 and 2 of EN 335-3.SIST EN 312:2004



EN 312:2003 (E)6Table 1 — General requirements at dispatchNo Property Test method Requirement1aTolerances on nominal dimensions— Thickness (sanded)within and between boards— Thickness (unsanded)within and between boards— Length and widthEN 324-1± 0,3 mm- 0,3 mm + 1,7 mm± 5 mm2aEdge straightness tolerance EN 324-2 1,5 mm per m3aSquareness tolerance EN 324-2 2 mm per m4 Moisture content EN 322 5 % to 13 %5aTolerance on the mean densitywithin a boardEN 323 ± 10 %6b
Formaldehyde releaseaccording to EN 13986— Class E 1Perforator valueSteady state emission valuecEN 120ENV 717-1Content £ 8 mg/100 g oven dry boarddRelease £ 0,124 mg/m3 air— Class E 2Perforator valueSteady state emission valuecEN 120ENV 717-1Content > 8 mg/100 g oven dry board£ 30 mg/100 g oven dry boardRelease > 0,124 mg/m3 airaThese values are characterized by a moisture content in the material corresponding to a relative humidity of 65 % and atemperature of 20 °C.bThe perforator values apply to boards with moisture contents H of 6,5 %. In the case of particleboards with differentmoisture content (in the range of 3 %
H 10 %) the perforator value shall be multiplied by a factor F which can be cal-culated from the following equation:F = - 0,133 H + 1,86cRequired for initial type testing other than for established products where initial type testing may also be done on the ba-sis of existing data with EN 120 or ENV 717-1 testing, either from factory production control or from external inspection.dExperience has shown that to ensure compliance with these limits, the rolling average of the EN 120 values found fromthe internal factory production control over a period of ½ year should not exceed 6,5 mg HCHO/100 g panel mass.5 Requirement valuesThe requirements in tables 2 to 11 shall be met by 5 percentile values (95 percentile values in the case of thicknessswelling) based on the mean values for individual boards and calculated in accordance with EN 326-1. In the caseof thickness swelling they shall be equal to or less than the values in tables 2 to 11 and in the case of all otherproperties they shall be equal to or greater than the values in tables 2 to 11.The values in tables 2 to 11 for both bending strength and modulus of elasticity shall apply to test results obtainedin the weakest direction in the plane of the panel.NOTE The manufacturer may test the panel in only the main direction if this direction is clearly indicated on the machinedready to use panel.SIST EN 312:2004



EN 312:2003 (E)76 Requirements for general purpose boards for use in dry conditions (Type P1)Boards of this type shall comply with the requirements given in tables 1 and 2.Table 2 — General purpose boards for use in dry conditions (Type P1) —Requirements for specified mechanical propertiesRequirementThickness range (mm, nominal)PropertyTestmethodUnit3 to 6> 6 to 13> 13 to 20> 20 to 25>25 to 32> 32 to 40> 40BendingstrengthEN 310N/mm21412,511,5108,575,5Internal bondEN 319N/mm20,310,280,240,200,170,140,14NOTEThe values are characterised by a moisture content in the material corresponding to a relative humidity of 65 %and a temperature of 20 °C.7 Requirements for boards for interior fitments (including furniture) for use in dryconditions (Type P2)Boards of this type shall comply with the requirements given in tables 1 and 3.Table 3 — Boards for interior fitments (including furniture) for use in dry conditions (Type P2) —Requirements for specified mechanical propertiesRequirementThickness range (mm, nominal)PropertyTestmethodUnit3 to 4> 4 to 6> 6 to 13> 13 to20> 20 to25> 25 to32> 32 to40> 40Bending strengthEN 310N/mm21314131311,5108,57Modulus of elas-ticity in bendingEN 310N/mm21 8001 9501 8001 6001 5001 3501 2001 050Internal bondEN 319N/mm20,450,450,400,350,300,250,200,20Surface sound-nessEN 311N/mm20,80,80,80,80,80,80,80,8NOTEThe values are characterised by a moisture content in the material corresponding to a relative humidity of 65 %and a temperature of 20 °C.SIST EN 312:2004



EN 312:2003 (E)88 Requirements for non load-bearing boards for use in humid conditions (Type P3)8.1 GeneralBoards of this type shall comply with the requirements given in tables 1, 4 and 5.8.2 Mechanical and swelling propertiesTable 4 — Non load-bearing boards for use in humid conditions (P3) —Requirements for
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