BS 6431-7-1986, en 177-1991
BS 6431-7-1986, en 177-1991
BS 6431-7-1986, en 177-1991
BSI
British Standard
tiles —
Part 7: Specification for dust-pressed
ceramic tiles with a water absorption
of 3 % < E u 6 % Group Blla
UDC 691.433-413-033.6:666.75-184
BS 6431-7:1986
Cooperating organizations
Contents
Page
Cooperating organizations Inside front cover
National foreword ii
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Foreword 2
1 Scope and field of application 3
2 References 3
3 Description 3
4 Shapes and sizes 3
5 Requirements 5
6 Marking and designation 8
7 Ordering 8
National appendix A Inside back cover
National appendix B Inside back cover
Figure 1 — Tile 4
Figure 2 — Tile with spacer lug 4
Table 1 5
Table 2 5
Table 3 6
© BSI 07-1999 i
BS 6431-7:1986
National foreword
This Part of this British Standard has been prepared under the direction of the
Clay Products Standards Committee and is the English language version of
EN 177:1991 “Ceramic tiles. Dust-pressed ceramic tiles with a water absorption
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Summary of pages
This document comprises a front cover, an inside front cover, pages i and ii,
the EN title page, pages 2 to 8, an inside back cover and a back cover.
This standard has been updated (see copyright date) and may have had
amendments incorporated. This will be indicated in the amendment table on the
inside front cover.
ii © BSI 07-1999
EUROPEAN STANDARD EN 177
NORME EUROPÉENNE
September 1991
EUROPÄISCHE NORM
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Descriptors: Tiles, coating slabs, water absorption tests, equipment specifications, shape, dimensions, dimensional tolerance,
appearance, physical properties, mechanical properties, chemical properties, marking
English version
CEN
European Committee for Standardization
Comité Européen de Normalisation
Europäisches Komitee für Normung
Central Secretariat: rue de Stassart 36, B-1050 Brussels
Foreword
This European Standard was drawn up by the
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2 © BSI 07-1999
EN 177:1991
dimensional tolerances, mechanical, physical and EN 122, “Ceramic tiles — Determination of chemical
chemical requirements, surface quality resistance — Glazed tiles”.
requirements and marking of ceramic tiles. EN 154, “Ceramic tiles — Determination of
It is applicable only to dust-pressed ceramic tiles of resistance to surface abrasion — Glazed tiles”.
first quality, including tiles premounted on sheets, EN 163, “Ceramic tiles — Sampling and basis for
with a water absorption of 3 % < E u 6 % according acceptance”.
to Group Blla of EN 87, for interior and exterior use EN 202, “Ceramic tiles — Determination of frost
(see clause 7 ordering) on both floors and walls. resistance”.
2 References 3 Description
EN 87, “Ceramic floor and wall tiles — Definitions, The definition of dust-pressed ceramic tiles is given
classification, characteristics and marking”. in EN 87. Mosaic is a tile of any geometrical shape
EN 98, “Ceramic tiles — Determination of whose surface area is equal or less than 90 cm2. The
dimensions and surface quality”. surface of tiles and components belonging to this
EN 99, “Ceramic tiles — Determination of water group can be smooth, profiled, wavy, decorated or
absorption”. finished in some other way. It can be unglazed
(UGL), glossy, matt or semi-matt (GL).
EN 100, “Ceramic tiles — Determination of modulus
of rupture”. Although tiles have a visible surface and usually a
surface which is intended to be adhered and bears a
EN 101, “Ceramic tiles — Determination of scratch back panel, they may have identical surfaces
hardness of surface according to Mohs”. without a panel or marking.
EN 102, “Ceramic tiles — Determination of
Tiles may have spacer lugs.
resistance to deep abrasion — Unglazed tiles”.
EN 103, “Ceramic tiles — Determination of linear 4 Shapes and sizes
thermal expansion”.
For shapes and sizes see Table 1 and Table 2 and
EN 104, “Ceramic tiles — Determination of Figure 1 and Figure 2.
resistance to thermal shock”.
EN 105, “Ceramic tiles — Determination of crazing
resistance”.
© BSI 07-1999 3
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4
EN 177:1991
Figure 1 — Tile
© BSI 07-1999
EN 177:1991
© BSI 07-1999 5
EN 177:1991
Table 3
Surface S of the product (cm2) Test
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according to
S u 90 90 < S u 190 190 < S u 410 S > 410
6 © BSI 07-1999
EN 177:1991
Table 3
Surface S of the product (cm2) Test
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according to
S u 90 90 < S u 190 190 < S u 410 S > 410
Physical properties
Water absorption % by weight Average 3 < E u 6 Individual max. 6,6 EN 99
Modulus of rupture in N/mm2 Average W 22 EN 100
min. 20
Scratch hardness of surface (Mohs’ scale)
a) glazed tiles min. 5 EN 101
b) unglazed tiles min. 6
Abrasion resistance
a) Resistance to deep abrasion of
unglazed tiles
Removed volume in mm3 max. 345 EN 102
b) Resistance to abrasion of glazed tiles According to the abrasion class indicated EN 154
Class I – IV by the manufacturer
Co-efficient of linear thermal expansion max. 9 × 10–6 EN 103
from ambient temperature to 100 °C (K–1)
Thermal shock resistance required EN 104
Crazing resistancea glazed tiles required EN 105
Frost resistance required if agreed EN 202
Chemical properties
Resistance to staining of glazed tiles
Class 1 – 3 min. Class 2 EN 122
Resistance to household chemicals and
swimming pool water cleansers, except to
cleansing agents containing hydrofluoric
acid and its compounds
a) glazed tiles min. Class B EN 122
Class AA – D
b) unglazed tiles required EN 106
Resistance to acids and alkalis (with the
exception of hydrofluoric acid and its
compounds)
glazed tiles required if agreed according to the EN 122
Class AA – D chemical
unglazed tiles resistance class indicated by the EN 106
manufacturer requiredb
a Certain decorative effects may have a tendency to craze. These shall be identified by the manufacturer, in which case the crazing
test given in EN 105 is not applicable.
b If the hue becomes slightly different this is not considered to be chemical attack.
© BSI 07-1999 7
EN 177:1991
examples:
Tiles and/or their packaging shall bear the following
marking: Dust pressed tile EN 177 BIIa 15 cm × 15 cm
(W 152,4 mm × 152,4 mm) UGL
a) manufacturer’s mark and/or trade mark and
the country of origin; Dust pressed tile EN 177 BIIa M 15 cm × 15 cm
(W 147 mm × 147 mm) GL
b) mark of the first quality;
c) reference to this European/National Standard; 7 Ordering
d) nominal and work sizes, modular (M) or When an order is placed, items such as size,
non-modular; thickness, type of surface, colour, relief, abrasion
e) nature of the surface e.g. glazed (GL) or class for glazed tiles1) and any special properties
unglazed (UGL). such as chemical resistance and resistance to frost,
shall be agreed by the parties concerned.
1)
Reference may be made for example, to the convention established between the EUF (European Association of Tile Fixers) and
the CEC (Federation of European Ceramic Tile Manufacturers).
8 © BSI 07-1999
BS 6431-7:1986
National appendix A
The United Kingdom participation in the preparation of this European Standard was entrusted by the Clay
Licensed Copy: iclnoa03 iclnoa03, Imperial College of Science and Technology (JISC), 26 July 2004, Uncontrolled Copy, (c) BSI
Products Standards Committee (CLB/-) to Technical Committee CLB/2 upon which the following bodies
were represented:
National appendix B
The British Standards corresponding to the European Standards related to in the text are as follows:
© BSI 07-1999
BS 6431-7:
1986
EN 177:1991 BSI — British Standards Institution
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British Standards. It presents the UK view on standards in Europe and at the
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