GEPVP CPD 6 (EN1863-2) EN.indd - Glass for Europe

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Construction Products Directive4.3.2.10 Protection against noise – Direct airbornesound reduction (10)The sound reduction indexes shall bedetermined in accordance with EN 12758.However, the information supplied with theincoming glass may be used as the heatstrengthening process does not alter thevalues.4.3.2.11 Energy conservation and heat retention– Thermal properties (11)EN 12758 gives generally accepted valuesthat can be used in the absence of measureddata. Hence there is no reason to test thischaracteristic.14The thermal transmittance value (U-value)shall be determined by calculation inaccordance with EN 673 with:• emissivity ε: the declared value of the glassmanufacturer. If the information is notavailable, the emissivity shall be determinedin accordance with EN 12898;• nominal thickness of the glass panes.4.3.2.12 Energy conservation and heat retention –Radiation properties: Light transmittanceand reflectance (12)The light transmittance and reflectance shallbe determined in accordance with EN 410.4.3.2.13 Energy conservation and heat retention– Radiation properties: Solar energycharacteristics (13)The solar energy transmittance andreflectance shall be determined in accordancewith EN 410.The information supplied with the incomingmaterial can be used if the heat strengtheningprocess does not alter the values.If the heat strengthening process alters theemissivity then the value must be determined inaccordance with EN 12898. The determinationshould be obtained on a heat strengthenedsample.The information supplied with the incomingmaterial can be used if the heat strengtheningprocess does not alter the values.The information supplied with the incomingmaterial can be used if the heat strengtheningprocess does not alter the values.
Evaluation of conformity of“Heat strengthened soda lime silicate glass” to hE N 1863-2Attachment 2: hEN Clause 5 Evaluation of conformity5.2.2 Initial type testing of heat strengthenedsoda lime silicate glass5.2.2.1 GeneralTo establish if a product conforms to thedefinition of heat strengthened soda limesilicate glass, initial type testing shall consistof:a) mechanical strength measurement inaccordance with EN 1863-1;b) fragmentation test in accordance withEN 1863-1.5.2.2.2 Test specimensThe test specimens needed for the initialtype test shall be processed from float glassaccording to EN 572-1 and EN 572-2 inaccordance with this standard.The “simplest” type of edge work specifiedin the manufacturer’s production controldocumentation shall be used. However, if anarrissed edge is used then all other types ofedge working are deemed to satisfy.The number of test specimens is as follows:a) For mechanical strength measurementthey are given in Table 2a for float glass,Table 2b for coated float glass andTable 2c for enamelled float glass.b) For fragmentation 5 test specimens perthickness are required.5.2.2.3 Test resultsa) When the mechanical strength ismeasured, no measured value shall bebelow that given in clause 9 of EN 1863-1.However, if one value falls below then themanufacturer shall ensure that the resultsrelate to a 5 % probability of breakage atthe lower limit of the 95 % confidenceinterval.b) In the fragmentation test, no test specimenshall exhibit a fragmentation assessmentthat does not meet Clause 8.5 ofEN 1863-1.Mechanical strength shall meet the requirementin EN 1863-1 Clause 9 when determined inaccordance with Annex B.1.1 of EN 1863-2.Fragmentation test is detailed in EN 1863-1Clause 8.Initial type testing is undertaken on float glass,both coated and uncoated if appropriate.The tables detail the number of test specimensrequired for the 4-point mechanical strengthtest.[If a larger range of thicknesses is produced,than the table covers, then the manufacturermay wish to consider 2 specimens perthickness. This will give proof that all thicknessesmeet the strength requirement.]For all products/thicknesses fragmentation testsmust be undertaken.15
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GEPVP CPD 6 (EN1863-2) EN.indd - Glass for Europe

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