This legislation vupòe define tolerances, flatness, machining of the edges, and the features to which must correspond 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
PREN 12600 Glass in building - Pendulum test - Impact test method for flat glass
and performance requirements.
The safety glass silicate-based sodo- calcium tempered is achieved through a sheet of monolithic glass and must match in case of rottoura to fragments with no sharp edges and rounded.
In the process of thermal curing may come to cause deformation of the surface of the sheet, these signs are defined staple marks, these deformations must still be within the tolerances specified for the realization of silicate glass, soda lime.
Remember that this production process will never generate a totally flat, so there may be processed to create two tipolgi of curvature:
The glass for the measurement of the bending is placed perpendicularly 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 room temperature.
For any work on the glass of soda lime silicate remembers that after the hardening activity should not be cut, sawn, or subject to processing edge so any activities to be undertaken on the plate must be strictly carried out the first of quenching; also for the realization of the holes must be taken into considerations slabs with a thickness exceeding AI4 mm, the hole diameter is recalled that misses possibly be less than the thickness of the sheet
Their position will be affected by:
nominal thickness of the sheet
sizes of the plate
diameter of the holes
sleep of the glass sheet
quantity of holes to be played back on the plate
We speak now of the fragmentation tests of the slabs the size of the samples to be tested must be: (refer to the Standard) and each specimen shall be hit with a tool steel tip with 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 how it should be placed the plate (test sample) is contained in Section 8.3 of the standard.
When the test will be listed fragments and verified their measurement measurement will be done by applying a mask detection of 50 +/- 1 MMAL order to verify precisely how many frmmenti were generated.
Also features glass that will be put to the test:
The marking that must have the soda lime silicate glass must be strictly the following:
name and logo of the manufacturer
number of the European standard of reference (in this case, EN 12150)