EN 622-3:2004

SLOVENSKI STANDARD
01-september-2004
1DGRPHãþD
SIST EN 622-3:1998
9ODNQHQHSORãþH6SHFLILNDFLMHGHO=DKWHYH]DVUHGQMHSORãþH
Fibreboards - Specifications - Part 3: Requirements for medium boards
Faserplatten - Anforderungen - Teil 3: Anforderungen an mittelharte Platten
Panneaux de fibres - Exigences - Partie 3: Exigences pour panneaux mi-durs
Ta slovenski standard je istoveten z: EN 622-3:2004
ICS:
79.060.20 9ODNQHQHLQLYHUQHSORãþH Fibre and particle boards
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 622-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2004
ICS 79.060.20 Supersedes EN 622-3:1997
English version
Fibreboards - Specifications - Part 3: Requirements for medium
boards
Panneaux de fibres - Exigences - Partie 3: Exigences pour Faserplatten - Anforderungen - Teil 3: Anforderungen an
panneaux mi-durs mittelharte Platten
This European Standard was approved by CEN on 2 February 2004.
CEN members are bound to comply with the CEN/CENELEC 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
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 notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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EUROPÄISCHES KOMITEE FÜR NORMUNG
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© 2004 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 622-3:2004: E
worldwide for CEN national Members.

Page
Contents
Foreword.3
1 Scope .4
2 Normative references .4
3 Terms and definitions.5
4 Requirements.6
4.1 General.6
4.2 Requirements for general purpose boards.6
4.2.1 Requirements for boards for use in dry conditions.6
4.2.2 Requirements for boards for use in humid conditions.7
4.2.3 Requirements for boards for use in exterior conditions .7
4.3 Requirements for load-bearing boards .8
4.3.1 General.8
4.3.2 Requirements for boards for use in humid conditions.8
4.3.3 Requirements for boards for use in humid conditions.9
5 Verification of compliance .10
5.1 General.10
5.2 External control.10
5.3 Factory production control.10
6 Marking .10
6.1 General purpose boards .10
6.2 Load-bearing boards .11
6.3 Colour coding.11
Annex A (normative) Supplementary properties .12
(normative)
Annex B Boil test according to EN 1087-1:1995 — Modified procedure .13
Annex C (normative) Determination of bending strength after boil test according to EN 1087-
1:1995 — Modified procedure.14
Bibliography .15
Foreword
This document (EN 622-3:2004) has been prepared by Technical Committee CEN/TC 112 “Wood-based
panels”, the secretariat 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 or by endorsement, at the latest by October 2004, and conflicting national standards shall be withdrawn
at the latest by October 2004.
This standard is one of a series specifying requirements for fibreboards. The other parts of this series are
listed in clause 2 and in the bibliography.
This document supersedes EN 622-3:1997.
The following, modifications have been made:
a) The quality requirements of the panel types MBH.H, MBH.E, MBH.LA2, MBH.HLS1 and MBH.HLS2 have
been modified.
b) The test interval for moisture resistance has been reduced in accordance with EN 13986.
Annexes A, B and C are normative.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland
and United Kingdom.
1 Scope
This European Standard specifies the requirements for hardboards as defined in EN 316.
The values listed in this standard relate to product properties but they are not characteristic values to be used in
1)
design calculations .
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 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
latest edition of the publication referred to applies (including amendments).
EN 310:1993, Wood-based panels — Determination of modulus of elasticity in bending and of bending
strength.
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
humidity
EN 319, Particleboards and Fibreboards — Determination of tensile strength perpendicular to the plane of the
board.
EN 326-1, Wood-based panels — Sampling, cutting and inspection — Part 1: Sampling and cutting of test
pieces and expression 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 an isolated lot of
panels.
EN 622-1, Fibreboards — Specifications — Part 1: General requirements.
EN 1087-1:1995, Particleboards - Determination of moisture resistance - Part 1: Boil test
EN 12871, Wood-based panels — Performance specifications and requirements for load-bearing boards for
use in floors, walls and roofs.
EN 13986:2002, Wood-based panels for use in construction — Characteristics, evaluation of conforming and
marking.
ENV 1995-1-1:1993, Eurocode 5 — Design of timber structures Part 1-1: General rules and rules for
buildings.
Fibre building boards — Determination of sand content.
ISO 3340,
1) Such characteristic values (e.g. for use in design calculation in ENV 1995-1-1) are either given EN 12369-1 or
derived by testing according to EN 789, EN 1058 and ENV 1156.
3 Terms and definitions
For the purposes of this European Standard, the following terms and definitions apply.
3.1
dry conditions
conditions corresponding to service class 1 of ENV 1995-1-1:1993 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 % for a few weeks per year
[EN 13986:2002]
3.2
humid conditions
conditions corresponding to service class 2 of ENV 1995-1-1:1993 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 85 % for a few weeks per year
[EN 13986:2002]
3.3
external conditions
conditions  corresponding  to  service  class 3  of  ENV 1995-1-1:1993 which  is  characterised  by
climatic conditions leading to higher moisture contents than in service class 2
[EN 13986:2002]
3.4
general purpose use
all non-load bearing applications, e.g. furniture and fitments
3.5
load-bearing use
use in a load-bearing construction, i.e. an organized assembly of connected parts designed to provide
mechanical resistance and stability to the works. Also referred to as “structure”
3.6
load duration category
see Table 1
Table 1 — Load duration categories
Order of accumulated duration of
Load duration category Examples of loading
characteristic load
Permanent more than 10 years self weight
Long-term 6 months to 10 years storage
Medium-term 1 week to 6 months imposed load
a
Short-term less than 1 week snow , wind
Instantaneous accidental loading
a
In areas which have a heavy snow load for a prolonged period of time. part of the load should be regarded as medium-term.
4 Requirements
4.1 General
Medium boards shall comply with the general requirements of EN 622-1 together with the relevant require-
ments set out in 4.2 and 4.3 of this standard. The requirements for some supplementary properties are given in
annex A.
The requirements in Tables 2 to 8 shall be met by 5 percentile values (95 percentile values in the case of
swelling in thickness), based on the mean test values for individual panels and calculated in accordance with
EN 326-1. In the case of swelling in thickness, they shall be equal to or less than the values in the Tables, and
in the case of all other properties, they shall be equal to or greater than the values in the Tables. The values in
the Tables for both bending strength and modulus of elasticity shall apply to test results obtained in any
direction in the plane of the panel.
Properties not required for specific board types are marked “–“.
With the exception of swelling in thickness, internal bond after boil test (see Tables 7, 8) and bending strength
after boil test (see Tables 3, 4, 8), the values given in the Tables are characterised by a moisture content in the
material corresponding to a temperature of 20 °C and a relative humidity of 65 %. The values given for swelling
in thickness, internal bond after boil test and bending strength after boil test are characterised by a moisture
content in the material corresponding to a temperature of 20 °C and a relative humidity of 65 % before the
treatment (immersion in water or boil treatment).
The moisture resistance of medium boards for use in humid and exterior conditions (see Tables 3, 4, 7 and 8) is
assessed either as internal bond after boil test (according to EN 1087-1), with the modified procedure given in
annex B, or as bending strength after boil test (according to EN 1087-1), with the modified procedure given in
annex C. These two testing procedures are regarded as equivalent alternatives. Where requirements for both
procedures are given, compliance with only one set of specifications is required (see Table 8).
4.2 Requirements for general purpose boards
4.2.1 Requirements for boards for use in dry conditions
Table 2 specifies the requirements for general purpose boards for use in dry conditions, e.g. interior fitments
including furniture.
Table 2 — Requirements for general purpose boards for use
in dry conditions (types MBL and MBH)
Ranges of nominal thickness (mm)
Board types
Test
Property Unit
method > 10£ 10
MBL MBH MBL MBH
Swelling in
EN 317 % 20 15 20 15
thickness 24 h
Internal bond EN 319 N/mm — 0,10 — 0,10
Bending strength EN 310 N/mm 10 15 8 12
4.2
...