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

Construction Products Directive5.2.2.4 Measurement of surface pre-stressThe manufacturer may also use surfacepre-stress measurement as a means ofproduct control. If this is done then all testspecimens shall be measured prior to testing.This will show the relationship betweensurface pre-stress and mechanical strength/fragmentation.Manufacturers with more than one productionline may perform the initial type test onspecimens from one line. The outcome valueof surface pre-stress measurement may thenbe used as reference for the other productionlines and shall be confirmed by factoryproduction control (FPC). This may also beapplied to new production lines.5.2.2.5 Heat strengthened patterned glassMeasurement of surface pre-stress can beundertaken as a means of product control(see Annex A – Table A.1 – 3.1.3 of 1863-2).The test should be undertaken as detailed inAnnex B.1.2.16Initial type testing of heat strengthenedpatterned glass may not be undertaken asa result of the wide variety of patternedsurfaces of patterned glass in accordancewith EN 572-5.Compliance of heat strengthened patternedglass shall be ensured by the sampling duringproduct control given in Annex A – Table A1– 3.1.4 together with either 3.1.5 or 3.1.6.If a manufacturer only heat strengthens a smallnumber of pattern types/thicknesses then it maybe worthwhile to subject test specimens to themechanical strength and fragmentation tests,(see 5.2.2.1).However, a manufacturer can produce theseproducts as long as they ensure by the factoryproduction control, especially product control,that they meet the requirements.Attachment 3: hEN Clause 6 Marking and labelling6.2 Product markingThe heat strengthened soda lime silicateglass product shall be marked in accordancewith Clause 11 of EN 1863-1.The manufacturer shall permanently mark with:• name or trade mark• EN 1863Attachment 4: hEN Annex A Factory production controlAnnex ATable A.1Factory production control requirementsThis is covered in the GEPVP seconddocument “Evaluation of conformity”.Table A1 applies to all types of heatstrengthened soda lime silicate glass.The generalities are covered in the GEPVPsecond document “Evaluation of conformity”.These cover:• Incoming raw materials• Process control• Product control