This legislation vupòe define tolerances, flatness, machining of the edges, and the characteristics which must be paid in case of fragmentation.
This legislation has the other riferimentile following standards:
EN 572-1 Glass in building - Basic soda lime silicate glass products:
Definitions and general physical and mechanical properties
EN 572-2 Glass in building - Basic soda lime silicate glass products: Float
EN 572-4 Glass in building - Basic soda lime silicate glass products: Drawn
EN 572-5 Glass in building - Basic soda lime silicate glass products:
EN 673 Glass in building - Determination of thermal transmittance
(U value) - Calculation Method
EN 1096-1 Glass in building - Coated glass - Definitions and classification
RES 12600 Glass in building - Pendulum test - Impact test method for flat glass
and performance requirements.
The safety glass based tempered soda lime silicate is realized through a sheet of monolithic glass and must match in case of rottoura fragments with no sharp edges and rounded.
In the process of thermal hardening can come to create deformations of the plate surface, these signs are defined signs of stapling, these deformations must still be within the tolerances specified for the realization of silicate glass, soda lime.
It should be noted that the production process can never generate a totally flat, then you will be able to come to create two tipolgi of curvature:
The glass for the measurement of the bending is placed perpendicular to the ground and kept in vertical position by holding the longer sides, the deformations must be verified lumgo the edges of the glass and along its diagonal, said measurement must be carried out at ambient temperature.
For any work on the glass of soda lime silicate remember that after the work hardening should not be cut, sawn, or subjected to processing board so any activities to be undertaken on the document must be strictly carried out the activity before quenching; also for the realization of the holes should be taken into considerations slabs with thickness exceeding AI4 mm, the hole diameter is recalled that misses possibly be less than the thickness of the slab
Their positioning will be affected by:
nominal thickness of the slab
magnitudes of the slab
diameter of the holes
sleep of the glass sheet
quantity of holes to be played on the slab
We speak now of the fragmentation tests of the plates the size of the samples to be tested must be: (please refer to the norm) and each specimen shall be struck with a steel tool with tip in a point located to13 mm from the edge and the middle of the longer side of the same specimen.
How to espi of sharp tools and should be placed as the plate (specimen) is contained in Section 8.3 of the standard.
At the end of the test will be listed in the fragments and tested their measurement, the measurement will be carried out by applying a mask of detection of 50 + / -1 MMAL order to verify exactly how many frmmenti will be generated.
Also characteristics of glass that will be put to the test:
The marking shall indicate that the glass is soda lime silicate must be strictly follows:
name and mark of the manufacturer
number of European reference standard (in this case EN 12150)