EN 14354:2017

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Holzwerkstoffe - Furnierte FußbodenbelägePanneaux à base de bois - Revêtements de sol à placage boisWood-based panels - Wood veneer floor coverings97.150Talne oblogeFloor coverings79.080Polizdelki iz lesaSemi-manufactures of timberICS:Ta slovenski standard je istoveten z:EN 14354:2017SIST EN 14354:2017en,fr,de01-december-2017SIST EN 14354:2017SLOVENSKI
STANDARDSIST EN 14354:2005/AC:2007SIST EN 14354:20051DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 14354
July
t r s y ICS
y {ä r z r Supersedes EN
s v u w vã t r r vEnglish Version
Woodæbased panels æ Wood veneer floor coverings Panneaux à base de bois æ Revêtements de sol à placage bois
Holzwerkstoffe æ Furnierte Fußbodenbeläge This European Standard was approved by CEN on
t y February
t r s yä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
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Avenue Marnix 17,
B-1000 Brussels
t r s y CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s v u w vã t r s y ESIST EN 14354:2017

Contents Page European foreword . 5 1 Scope . 6 2 Normative references . 6 3 Terms and definitions . 7 4 Requirements . 8 4.1 General . 8 4.2 General requirements . 8 5 Classification requirements . 9 5.1 General . 9 5.2 Classification requirements for elements with lacquered surfaces . 10 6 Marking and packaging . 10 6.1 Marking . 10 6.2 Packaging . 11 7 Test report . 11 Annex A (normative)
Determination of thickness, length, width, squareness, deviation from edge straightness and cup . 12 A.1 General . 12 A.2 Sampling . 12 A.3 Conditioning . 12 A.4 Test equipment . 12 A.5 Procedure. 13 A.5.1 Determination of thickness t . 13 A.5.2 Determination of length l . 14 A.5.3 Determination of width w and dimensions of squared elements . 14 A.5.4 Determination of deviation from squareness q . 15 A.5.5 Determination of deviation of edge straightness s . 15 A.5.6 Determination of cup fw . 16 A.6 Calculation and expression of results . 16 A.6.1 Thickness t . 16 A.6.2 Width w . 16 A.6.3 Length l. 16 A.6.4 Deviation from squareness q . 16 A.6.5 Deviation from edge straightness s . 16 A.6.6 Cup fw . 17 A.7 Test report . 17 SIST EN 14354:2017

Annex B (normative)
Determination of opening and lipping between elements . 18 B.1 General . 18 B.2 Sampling . 18 B.3 Conditioning . 18 B.4 Test equipment . 18 B.5 Procedure . 18 B.5.1 Assembling . 18 B.5.2 Measuring of lipping . 19 B.5.3 Measuring of openings . 19 B.5.4 Calculation and expression of results . 19 B.6 Test report . 19 Annex C (normative)
Determination of the elasticity of lacquer. 20 C.1 General . 20 C.2 Sampling . 20 C.3 Apparatus . 20 C.4 Procedure . 20 C.5 Calculation and expression of results . 20 C.6 Evaluation of results, elasticity classification . 20 Annex D (normative)
Determination of the wear resistance using the falling sand method . 21 D.1 General . 21 D.2 Sampling . 21 D.3 Conditioning . 21 D.4 Apparatus . 22 D.4.1 Testing machine . 22 D.4.2 Grit feeder and accessories . 22 D.4.3 Additional material or equipment . 27 D.5 Procedure . 27 D.5.1 General . 27 D.5.2 Maintenance of the abrading wheels . 27 D.5.3 Operation of the abrader . 27 D.5.4 Calibration . 28 D.5.5 Abrasion of test specimen . 29 D.6 Expression of results . 30 D.7 Test report . 30 Annex E (normative)
Determination of abrasion resistance using the sand paper method . 31 E.1 General . 31 SIST EN 14354:2017

E.2 Sampling . 31 E.3 Conditioning . 31 E.4 Apparatus . 32 E.4.1 Testing machine . 32 E.4.2 Additional material or equipment . 35 E.5 Procedure. 35 E.5.1 General . 35 E.5.2 Preparation of test specimens and abrasive papers . 36 E.5.3 Preparation of abrasive wheels . 36 E.5.4 Determination of the abrasion rate of abrasive paper . 36 E.5.5 Abrasion of test specimen . 36 E.5.6 Expression of results . 38 E.5.7 Test report . 38 Annex F (normative)
Determination of the adhesion of the lacquer — Cross cut test . 39 F.1 General . 39 F.2 Test equipment . 39 F.2.1 Cutting tool . 39 F.2.2 Spacing guide . 41 F.2.3 Soft brush . 41 F.2.4 Transparent pressure-sensitive adhesive tape . 41 F.3 Sampling . 42 F.4 Test procedure . 42 F.4.1 General . 42 F.4.2 Cutting and removing the lacquer . 42 F.5 Expression of the results . 43 F.6 Test report . 44 Annex G (normative)
Complementary properties . 45 Annex H (informative)
Guide for evaluation of conformity of product quality . 46 H.1 General . 46 H.2 Terms and definitions . 46 H.3 Rules for evaluation of conformity . 47 H.3.1 Batch . 47 H.3.2 Sampling . 47 H.3.3 Evaluation of conformity . 47 H.4 Sampling report . 48 Bibliography . 49 SIST EN 14354:2017

European foreword This document (EN 14354:2017) 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 January 2018, and conflicting national standards shall be withdrawn at the latest by January 2018. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 14354:2004. Compared to EN 14354:2004 the following modifications have been made: a) definitions of lacquered and oiled surfaces were introduced; b) deletion of requirements on humidity variations as in 4.3; c) modifications of classification on wear resistance in Table 2 with two methods of testing; d) requirement for the locking strength in Table 2 for the classes 32 and 33; e) modified test method for abrasion resistance in Annex D; f) new method for abrasion resistance in Annex E; g) reference to test according ISO 24339 in Annex G. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: 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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 14354:2017

1 Scope This European Standard defines terms and specifies requirements and test methods for wood veneer floor coverings with multilayer built up for internal use. It gives guidance for the evaluation of conformity of the products to the requirements of this standard. This European Standard is not applicable to multilayer parquet elements with a minimum top layer thickness of 2,5 mm. For these products EN 13489 applies. 2 Normative references 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 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 438-2:2016, High-pressure decorative laminates (HPL) — Sheets based on thermosetting resins (usually called laminates) — Part 2: Determination of properties EN 1534, Wood flooring — Determination of resistance to indentation — Test method EN 13329:2016, Laminate floor coverings — Elements with a surface layer based on aminoplastic thermosetting resins — Specifications, requirements and test methods EN 13442, Wood flooring and wood panelling and cladding — Determination of the resistance to chemical agents EN 16094, Laminate floor coverings — Test method for the determination of micro-scratch resistance EN 60454–2, Specification for pressure-sensitive adhesive tapes for electrical purposes — Part 2: Methods of test (IEC 60454-2) EN ISO 868:2003, Plastics and ebonite — Determination of indentation hardness by means of a durometer (Shore hardness) (ISO 868:2003) EN ISO 10874, Resilient, textile and laminate floor coverings — Classification (ISO 10874) EN ISO 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method (ISO 6506-1) ISO 48, Rubber, vulcanized or thermoplastic — Determination of hardness (hardness between 10 IRHD and 100 IRHD) ISO 7267-2, Rubber-covered rollers — Determination of apparent hardness — Part 2: Shore-type durometer method ISO 24334, Laminate floor coverings — Determination of locking strength for mechanically assembled panels ISO 24339, Laminate and textile floor coverings — Determination of dimensional variations after exposure to humid and dry climate conditions SIST EN 14354:2017

ASTM D 785, Standard test method for Rockwell hardness of plastics and electrical insulating materials FEPA-Standard 42-1, Grains of fused aluminium oxide, silicon carbide and other abrasive materials for bonded abrasives and for general applications Macrogrits F 4 to F 220 FEPA-standard 44-1, Grains of fused aluminium oxide and silicon carbide abrasive materials — Part 1: Determination of bulk density — Macrogrits F and P series 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 wood veneer floor covering rigid floor covering consisting of a substrate made from a wood-based panel, with a top layer of wood veneer and possibly a backing 3.2 top layer finished upper wood layer, intended to be the visible side when the floor is installed 3.3 substrate core material of the wood veneer floor covering 3.4 backing layer opposite to the top layer 3.5 wood veneer floor covering element smallest single item identified as the complete product, shaped and machined on its sides to the appropriate dimensions Note 1 to entry: The element is provided with a suitable system allowing the elements to be assembled together at installation. 3.6 cup curvature, concave or convex, of the element across the width of the face 3.7 lipping difference in height, at the edge, between the upper faces of two adjacent and assembled elements when laid on a flat surface 3.8 deviation from edge straightness concavity or convexity of the edge of the element along the length between the two ends of the element 3.9 wear layer layer on which wearing occur SIST EN 14354:2017

3.10 lacquered surface film-forming coating with a minimum thickness of 20 µm 3.11 oiled surface non film forming coating with in general less wear resistance can be provided only by maintenance Note 1 to entry: These are products containing natural oil, wax or other material for impregnation. 4 Requirements 4.1 General All wood veneer floor coverings shall comply with the general requirements given in Table 1. Wood veneer floor coverings with lacquered surface shall comply with the classification requirements given in Table 2. The values given in this Table take account of uncertainties due to variations in the application of finishes and of those described in the test method in Annex D and Annex E. 4.2 General requirements The nominal dimensions shall be declared by the manufacturer at a given humidity. For appearance for evaluation of conformity, to be used when requested about product quality, the procedure in Annex H may be used. The wood veneers used for the top layer are hardwood or softwood species and shall be free from decay and insect attack. Variations of colour can occur under the influence of light. SIST EN 14354:2017

Table 1 — General requirements Characteristics Requirements Test methods Moisture content H (dispatch from manufacturer) 5 %
Haverage
9 % and Hmax – Hmin
3 % EN 322 Thickness t of an element tmax – tmin
0,50 mm taverage – tnominal
± 0,50 mm
Length l of the top layer in the same package l
1 500 mm: lmax – lmin
0,50 mm l > 1 500 mm: lmax – lmin
0,30 mm/m laverage – lnominal ≤ 1 mm
Width w of the top layer in the same package wmax – wmin
0,20 mm waverage – wnominal
0,10 mm
Length l and width w of squared elements l = w laverage – lnominal
0,10 mm waverage – wnominal
0,10 mm lmax – lmin
0,20 mm wmax – wmin
0,20 mm Annex A Deviation of squareness qmax
0,20 mm
Deviation from edge straightness of the top layer s smax
0,30 mm/m
Cup fw in width direction |fw max |
0,20 % |fw average |
0,15 %
Lipping p pmax
0,15 mm Annex B Opening between elements
0,20 mm
Adhesion of the lacquera
class 2 Annex F Internal bond of the substrateb
1,25 N/mm2 EN 319 Surface soundness
1,00 N/mm2 EN 13329:2016, Annex D max is maximum value min is minimum value a Not applicable for oiled surfaces. b For the mechanical assembly systems only (assembly system without glue). 5 Classification requirements 5.1 General Veneer floor coverings shall be classified as suitable for different levels of use, according to the performance requirements specified in Table 2, when tested with the methods given therein. Classification shall conform to the scheme specified in EN ISO 10874 (levels 21, 22, 23, 31, 32, 33). The SIST EN 14354:2017

use classification defined in the Table 2 had been fixed on the basis of the material (wood veneer) and the linked test methods. 5.2 Classification requirements for elements with lacquered surfaces The classification requirements for elements with lacquered surfaces are given in Table 2. For the use of this table the producer has to declare which abrasion resistance test method has been used (Annex D or Annex E) and in the case of Annex D the thickness of the top layer. Table 2 — Classification requirements for elements with lacquered surfaces ex- factory Class 21 22 23 31 32 33 Test method Symbol
Level of use Domestic Commercial
Moderate General Heavy Moderate General Heavy Resistance to indentation
10 N/mm2
20 N/mm2
30 N/mm2
40 N/mm2 EN 1534 Thickness swelling
15 %
10 % EN 13329:2016 Annex G Impact resistance (Elasticity) EC 0 EC 1 EC 2 EC 3 Annex C Wear resistance 1,0 mm < top layer < 2,5 mm 800 revolutions 1 500 revolutions 3 000 revolutions Annex D Wear resistance Top layer
1,0 mm 1 000 revolutions 2 000 revolutions 4 000 revolutions 6 000 revolutions Annex D Wear resistance Alternative method 900 revolutions 1 500 revolutions 2 000 revolutions 4 000 revolutions Annex E Locking strength No requirement Length
1,0 KN/m Short side
2,0 KN/m ISO 24334 6 Marking and packaging 6.1 Marking Wood veneer floor coverings which comply with the requirements of this standard shall have the following information marked by the manufacturer, either on their packaging, or on a label or information sheet included in the packaging. a) product name and number of this document, EN 14354; b) level of use and used abrasion test method (EN 14354:2017, Annex D or E); SIST EN 14354:2017

c) wood species of the top layer and thickness of the top layer in the case of use of abrasion method according to EN 14354:2017, Annex D; d) nominal dimensions of one element: thickness × width × length in millimetres; e) the number of elements contained in a package; f) the area in square metres contained in a package; g) manufacturer’s or supplier’s identification. 6.2 Packaging The product shall be delivered in packages designed to protect the corners, edges and surfaces of the product, under normal conditions of transport and handling. Installation, cleaning and maintenance instructions shall be delivered together with the product. 7 Test report If a test report is requested, it shall contain at least the following information: a) the name and address of the test laboratory; b) date of test report; c) a reference to this standard; d) the product tested; e) sampling information; f) test result; g) all deviations from this standard. SIST EN 14354:2017

Annex A (normative)
Determination of thickness, length, width, squareness, deviation from edge straightness and cup A.1 General This annex specifies methods for measuring the thickness, length, width, squareness, deviation from edge straightness and cup of wood veneer floor covering elements. A.2 Sampling Take 5 elements at random. A.3 Conditioning Elements are measured without conditioning. If requested, the test pieces shall be stabilized to a constant mass in an atmosphere of (23 ± 2) °C and (50 ± 5) % relative humidity. Constant mass is considered to be reached when the results of two successive weighing operations, carried out at an interval of 24 h, do not differ by more than 0,1 % of the mass of the test pieces. A.4 Test equipment A.4.1 Micrometer, sliding caliper or any other equivalent tool giving an accuracy of 0,05 mm. A.4.2 Sliding caliper or any other equivalent tool giving an accuracy of 0,01 mm. A.4.3 Square arms with lengths of 300 mm and having a maximum angular distortion of 0,02 mm at 300 mm. A.4.4 Steel ruler of length at least equal to the length of test specimen and having a maximum straightness deviation of 0,05 mm over 1 000 mm. A.4.5 Apparatus (T–assembly) for measuring width flatness consisting of a dial gauge accurate to ± 0,01 mm with a rounded tip with a radius of
5,5 mm, installed centrally in relation to three rounded supports with a radius of
5 mm. The supports shall be adjustable along a T-shaped assembly of bars to provide the required gauge length. The measurement d shall not be less than the width w of the test specimen minus 10 mm. The tip of the gauge in contact with the face of the test specimen shall apply a force of (1,0 ± 0,5) N. The mass of the apparatus shall not affect the flatness of the test specimen beyond the limit of the accuracy of the gauge. See Figure A.1 for illustration. The instrument shall be set to zero against a suitable reference plate. SIST EN 14354:2017

Dimensions in millimetres
Key a view A enlarged 1 dial gauge 2 T-groove 3 adjustable pin 4 adjustable bridge Figure A.1 — Instrument for measuring the width flatness (Principle) A.4.6 Steel tape or ruler with an accuracy of ± 0,1 mm up to a length of 1,50 m, and ± 0,5 mm for longer lengths. A.4.7 Thickness gauges ranging from 0,5 mm to 0,10 mm in steps of 0,01 mm, and from 0,10 mm to 0,50 mm in steps of 0,05 mm. A.5 Procedure A.5.1 Determination of thickness t Measure the thickness t with a micrometer, or any other device of the equipment described in A.4.1, at a distance of 20 mm from the edges of the top layer, at points located in each corner and in the middle of each long side (only four corner points if the length is
600 mm), see Figure A.2. SIST EN 14354:2017

Dimensions in millimetres
Figure A.2 — Measuring points for determination of thickness t A.5.2 Determination of length l For decorative pattern effects, measure the length of the elements with the test equipment described in A.4.2. For non-decorative pattern effects, measure the length of the elements when shorter than 500 mm with the test equipment described in A.4.2 and for lengths equal to or longer than 500 mm, with the test equipment described in A.4.6. Measure the length l of the top layer along two lines parallel to the axis of the element and at a distance of 20 mm from the edges (see Figure A.3). Dimensions in millimetres
Figure A.3 — Measuring for determination of length l A.5.3 Determination of width w and dimensions of squared elements Measure the width w with a micrometer, or any of the other device in A.4.1 along two lines parallel to the sides or edges of the top layer, at a distance of 20 mm from the edges or sides and in the middle for elements with a length of > 600 mm (see Figure A.4). SIST EN 14354:2017

Dimensions in millimetres
Figure A.4 — Measuring points for determination of width w A.5.4 Determination of deviation from squareness q Place one arm of the square (A.4.3) against one long side of the top layer of the element, and determine the maximum deviation to square at the small side. The same procedure is also done on the diagonally opposite corner (see Figure A.5).
Figure A.5 — Determination of squareness q A.5.5 Determination of deviation of edge straightness s Place the steel ruler (A.4.4) against the long sides of the top layer which is concave and determine the maximum deviation (see Figure A.6).
Figure A.6 — Determination of edge straightness s SIST EN 14354:2017

A.5.6 Determination of cup fw
Figure A.7 — Determination of cup fw Adjust the supports along the T-assembly (A.4.5) of the bars according to the width of the element to evaluate (see Figure A.7). The distance between the centres of the supports shall not be less than the width w of the element reduced with 10 mm. Determine the maximum cup for each element. A.6 Calculation and expression of results A.6.1 Thickness t Calculate the mean value from the number of measurements taken. Record the maximum and the minimum individual values. Express the results in millimetres to the nearest 0,1 mm. A.6.2 Width w Calculate the mean value from the number of measurements taken. Record the maximum and the minimum individual values. Express the results in millimetres to the nearest 0,1 mm. A.6.3 Length l Calculate the mean value from the number of measurements taken. Record the maximum and the minimum individual values. Express the results in millimetres to the nearest 0,1 mm. A.6.4 Deviation from squareness q Record all measured values and take as result the largest value of the deviation of the side to the nearest 0,1 mm. A.6.5 Deviation from edge straightness s Record all measured values and take as result the mean value and the largest of the deviation to the ruler. Divide this result by the length and express it to the nearest 0,1 mm/m. SIST EN 14354:2017

A.6.6 Cup fw Record all measured values and take as result the largest convex and concave values and divide each by the width w (see A.6.2). The result is expressed in percent rounded to the nearest 0,01 %. Record convex cup as a (+) value and concave cup as a (–) value. A.7 Test report The test report shall contain the following information: a) name and the address of the laboratory; b) name and address of the sponsor, if any, requesting the test; c) sampling procedure and the identification of the sample; d) date of delivery; e) date of the test(s); f) type and full description of the elements; g) conditioning applied to the elements prior to testing; h) climate conditions within the laboratory during the test; i) reference to the methods and, if any, the deviations; j) a short description of the test equipment; k) test results; l) date of the test report. SIST EN 14354:2017

Annex B (normative)
Determination of opening and lipping between elements B.1 General This annex specifies methods for measuring lipping and opening between elements. B.2 Sampling Take 8 elements as test pieces, chosen at random. B.3 Conditioning Elements are measured either without conditioning or, if requested, the test pieces shall be stabilized to a constant mass in an atmosphere of (23 ± 2) °C and (50 ± 5) % relative humidity. Constant mass is considered to be reached when the results of two successive weighing operations, carried out at an interval of 24 h, do not differ by more than 0,1 % of the mass of the test pieces. B.4 Test equipment B.4.1 A thickness gauge as described in A.4.7 or a T-assembly as described in A.4.5. B.4.2 A steel ruler or any other device, by which the first strip row shall be aligned and whose length is
2,50 m B.4.3 A test surface of appropriate size, rigid, horizontal and flat B.5 Procedure B.5.1 Assembling By hand force, firmly assemble the test pieces without using any glue, as in Figure B.1. The -Ï- symbol indicates the 13 measuring points.
Key 1 steel ruler 2 measuring points 3 test pieces Figure B.1 — Measuring points to determine the opening and lipping between elements SIST EN 14354:2017

B.5.2 Measuring of lipping Measure the lipping with a thickness gauge or a T-assembly (see B.4), without applying any force to the elements at the 13 indicated points in Figure B.1. The measurement shall not be taken more than 5 mm from the joints edge. B.5.3 Measuring of openings Measure the opening with a thickness gauge between the elements at the 13 indicated points in Figure B.1. B.5.4 Calculation and expression of results Record the maximum individual value of lipping and openings. Express the results in millimetres to the nearest 0,05 mm. B.6 Test report The test report shall contain the following information: a) name and the address of the laboratory; b) name and address of the sponsor, if any, requesting the test; c) sampling procedure and the identification of the sample; d) date of delivery; e) date of the test(s); f) type and full description of the elements; g) conditioning applied to the elements prior to testing; h) climate conditions within the laboratory during the test; i) reference to the methods and, if any, the deviations; j) a short description of the test equipment; k) test results; l) date of the test report. SIST EN 14354:2017

Annex C (normative)
Determination of the elasticity of lacquer C.1 General Test in accordance with EN 438–2:2016, Clause 21 “Impact resistance with large diameter ball”, with the following modifications. C.2 Sampling Take five veneer floor covering elements, chosen at random. Take from each element one test piece measuring approximately 180 mm × 180 mm (or in case of smaller width than 180 mm, w mm × 180 mm). C.3 Apparatus In addition to the apparatus specified in EN 438–2:2016, Clause 12, a flexible extruded polyethylene foam sub-layer of (3 ± 0,5) mm thickness, and with a density of (25 ± 5) kg/m3 is required. The zoom factor of the magnification glass shall be 10. The indicator fluid is a waterborne solution of 1 % methylene blue. C.4 Procedure On the five small test pieces carry out the large-diameter ball test in accordance with EN 438-2, on the steel plate with the foam but without the clamping frame. Adjust the drop height in steps of 50 mm, to determine the maximum height which does not produce cracks. For the evaluation of the result - the indicator fluid shall be used. C.5 Calculation and expression of results Record the results of each test and calculate the average to the nearest 50 mm. C.6 Evaluation of results, elasticity classification The classification system is based on the results of the large-diameter ball test. Use Table C.1 to determine the appropriate elasticity class (EC 0 to EC 3). Table C.1 — Elasticity classification
Elasticity classification
Falling height mm
1 000
1 200
1 400 EC 0 EC 1 EC 2 EC 3
Annex D (normative)
Determination of the wear resistance using the falling sand method D.1 General This annex specifies a test method to determine the wear resistance of lacquered surfaces using the falling sand method. D.2 Sampling One veneered floor covering element is needed. Take from this element three test specimens, measuring approximately 100 mm x 100 mm: — two centred 10 mm in from the short edges; and — one exactly in the centre of the element (see Figure D.1). Machined edges and machined surfaces shall be avoided in the specimens. If the thickness of the specimens exceeds 8 mm the specimens shall be milled down from the backside to (7,5 ± 0,5) mm to ensure a horizontal load of the abrader arms. Make sure that specimens are uniformly flat and parallel after milling. If the dimension of the elements makes the described sampling impossible, the test specimens shall be sampled from the nearest available area. If the elements measure less than 100 mm, then a joint is necessary. The joint shall be positioned in the middle of the 100 mm x 100 mm specimen.
Figure D.1 — Sampling from one floor covering element Drill a (7,2 ± 0,1) mm centre hole into the test specimen. D.3 Conditioning Precondition the test specimens for at least 72 h in the conditioning chamber (D.4.3.2). SIST EN 14354:2017

D.4 Apparatus D.4.1 Testing machine D.4.1.1 General The testing machine shall consist of the items specified in D.4.1.2 to D.4.1.4. D.4.1.2 Test specimen holder In form of a disc with a diameter of approximately 105 mm (item 4 in Figure D.3) which rotates in a horizontal plane with a permitted deviation of ± 2 mm/m at a frequency of 58/min to 62/min and to which the test specimen (item 3 in Figure D.3) can be clamped with a clamping screw (item 11 in Figure D.3). D.4.1.3 Holding and lifting device Holding and lifting device (item 7 in Figure D.3) for the abrasive wheels, so constructed that each wheel exerts a force of (10 ± 0,2) N on the test specimen. A counterweight of (150 ± 3) g is required to counterbalance the mass of the leather abrading wheel (D.4.2.4). A second pair of leather abrading wheels may be used for this purpose. The calibration and maintenance of the Taber abrader arms should be carried out according to EN 13329:2016, Annex F. D.4.1.4 Revolution-counter A revolution counter is needed to record the number of revolutions of the specimen holder. D.4.2 Grit feeder and accessories D.4.2.1 General A Grit feeder shall have a minimum storage capacity of about 200 g of grit. It shall be possible to open it at the top and at the bottom. The bottom opening shall be positioned (10 ± 1) mm above the face of the test piece and have a length of (16 ± 1) mm and width of (3,18 ± 0,38) mm. The length of the bottom opening shall be installed radially to the test specimen holder. To make sure of a regular flow, a device shall be provided in the grit feeder to ensure a regular flow. A further device ensuring an immediate stop of the feeding is also required (see Figure D.2 and Figure D.3). D.4.2.2 Vacuum cleaning device A suction nozzle positioned (3 ± 2) mm above the track to be worn, shall be installed in the axial vertical plane behind the left wheel after the abrasive grit passes under the wheel (relative to the rotation direction; see Figure D.3). The vacuum power shall remove all dust and debris but shall not influence the flow of falling grit. NOTE E
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