BS EN 572-1-2004 pdf download.Glass in building Basic soda lime silicate glass products Part 1: Definitions and general physical and mechanical properties.
This Part of this BS EN 572 specifies arid classifies basic glass products, indicates their chemical composition, their main physical and mechanical characteristics and defines their general quality criteria.
Specific dimensions and dimensional tolerances, description of faults, quality limits and designation for each basic product type are not included in this Part, but are given in other Parts of this standard specific to each product type:
EN 572-2 Float glass
EN 572-3 Polished wired glass
EN 572-4 Drawn sheet glass
EN 572-5 Patterned glass
EN 572-6 Wired patterned glass
EN 572-7 Wired or unwired channel shaped glass
EN 572-8 Supplied and final cut sizes
EN 572-9 Evaluation of conformity/Product standard
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 410, Glass in building — Determination of luminous and solar characteristics of glazing
EN 572-2. Glass in building — Basic soda lime silicate glass products — Part 2: Float glass
EN 572-3. Glass in building — Basic soda lime silicate glass products — Part 3: Polished wired glass
EN 572-4. Glass in building — Basic soda lime silicate glass products — Part 4: Drawn sheet glass
EN 572-5. Glass in building — Basic soda lime silicate glass products — Part 5: Patterned glass
EN 572-6, Glass in building — Basic soda lime silicate glass products — Part 6: Wired patterned glass
EN 572-7, Glass in building — Basic soda lime silicate glass products — Part 7: Wired or unwired channel shaped glass
3 Terms and definitions
For the purposes of this European Standard, the following terms and definitions apply.
float
flat, transparent, clear or tinted soda-lime silicate glass having parallel and polished faces obtained by continuous casting and floatation on a metal bath
NOTE In French called ‘glace and in German ‘Floatglas’.
3.2
drawn sheet glass
flat, transparent, clear or tinted soda-lime silicate glass obtained by continuous drawing, initially vertically, of a regular thickness and with the two surfaces fire polished
NOTE Drawn sheet glass covers three products; new antique drawn sheet glass, drawn sheet glass for renovation and drawn sheet glass with minimum visual faults,
3.3
patterned glass
flat, translucent, clear or tinted soda-lime silicate glass obtained by continuous casting and rolling
3.4
wired patterned glass
flat, translucent, clear or tinted soda-lime silicate glass obtained by continuous casting and rolling which has a steel mesh welded at all intersections incorporated in the glass during its manufacturing process. The surfaces may be either patterned or plain
NOTE In German wired patterned glass with pain surfaces is called Drahtglas
3.5
polished wired glass
flat, transparent, clear soda-lime silicate glass having parallel and polished faces obtained by grinding and polishing the faces of wired patterned glass
3.6
wired or unwired channel-shaped glass
translucent, clear or tinted soda-lime silicate glass, wired or unwired, obtained by continuous casting and rolling, which is formed into a U shape during the manufacturing process
4 General principles
EN 572-1 shall be read in conjunction with Parts 2 to 9 of this European Standard.
6.3 Stability of physical and chemical characteristics
For basic glass products, the physical and chemical characteristics can be considered as remaining constant over time.
a) Since glass is insensitive to photochemical effects, the spectral properties (transmission of light and solar energy) of the basic glass products are not modified by direct or indirect solar radiation.
b) The surface of the glass used in building is virtually insensitive to attack from the environment.
NOTE WhHst the surface of the glass when installed in a building is virtually insensitive to attack from water care should be taken to protect the glass surface prior to installation. Inappropriate storage can result In waterfhumidity being drawn up between glass sheets. This concentrated environment can cause attack of the surface (see [1]).
6.4 General quality criteria and their evaluation
6.4.1 OptIcal
This criterion concerns the visibility of objects observed through the glass and only applies to transparent glass products.
The main faults that can affect the optical quality are distortion of the surface and lack of homogeneity in the body of the glass.
The optical quality shall be evaluated by means of a visual observation method.
6.4.2 Appearance
This criterion concerns the appearance of the product.
The visual quality can be affected by the presence of spot faults (bubbles, stones, etc.), linear! extended faults
(scuff marks, scratches, lines, deposits, impressions, etc.). pattern faults and wire faults.
Spot faults are evaluated by specifying numbers and dimensions.
Linear/extended faults are evaluated by visual observation.
Pattern faults and wire faults are evaluated by measuring deviation.BS EN 572-1-2004 pdf download.

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