GEPVP CPD 4 (EN12150-2).EN.indd - Glass for Europe

Evaluation of conformity of“Thermally toughened soda lime silicate safety glass” to hE N 12150-2Attachment 2: hEN Clause 5 Evaluation of conformity5.2.2 Initial type testing of thermally toughenedsoda lime silicate safety glass5.2.2.1 GeneralTo establish if a product conforms to thedefinition of thermally toughened soda limesilicate safety glass, initial type testing shallconsist of:a) mechanical strength measurement inaccordance with EN 12150-1;b) fragmentation test in accordance withEN 12150-1.Mechanical strength shall meet the requirementin EN 12150-1 Clause 9.4 when determined inaccordance with Annex B.1.1 of EN 12150-2.The fragmentation test is detailed inEN 12150-1 Clause 8.5.2.2.2 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 floatglass, table 2b for coated float glassand table 2c for enamelled float glass.b) For fragmentation 5 test specimens perthickness are requiredInitial 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.155.2.2.3 Test resultsa) When the mechanical strength ismeasured, no measured value shallbe below that given in clause 9.4 ofEN 12150-1. However, if one valuefalls below then the manufacturer shallensure that the results relate to a 5 %probability of breakage at the lowerlimit of the 95 % confidence interval.b) In the fragmentation test, no testspecimen shall exhibit a fragmentationassessment that does not meetclauses 8.5 and 8.7 of EN 12150-1.