EN 572-2:2012

Glass in building - Basic soda lime silicate glass products - Part 2: Float glass

This European Standard specifies dimensional and minimum quality requirements (in respect of optical and visual faults) for float glass, as defined in EN 572-1:2012, for use in building.
This European Standard applies only to float glass supplied in jumbo sizes (see Note 1), split sizes (see Note 2) and oversize plates (see Note 3).
NOTE 1   Jumbo sizes - PLF (plateau largeur de fabrication) - Bandmasse.
NOTE 2   Split sizes - DLF (dimension largeur de fabrication) - Geteilte Bandmasse.
NOTE 3   Oversize plates - these are plates where the nominal length, H, is greater than 6 000 mm. These plates are produced to special order.
EN 572-8 gives information on float glass in sizes (i.e. supplied and final cut sizes) other than those covered by this European Standard.

Glas im Bauwesen - Basiserzeugnisse aus Kalk-Natronsilicatglas - Teil 2: Floatglas

Diese Europäische Norm legt die Anforderungen an Maße und Mindestqualität (in Bezug auf optische und sichtbare Fehler) für Floatglas für das Bauwesen, wie es in EN 572-1:2012 definiert ist, fest.
Diese Europäische Norm ist nur für Floatglas, das in Bandmaßen (siehe Anmerkung 1), in geteilten Band-maßen (siehe Anmerkung 2) und in übergroßen Scheiben (siehe Anmerkung 3) geliefert wird, anwendbar.
ANMERKUNG 1   Bandmaße — Jumbo sizes — PLF (Plateau Largeur de Fabrication).
ANMERKUNG 2   Geteilte Bandmaße — Split sizes — DLF (Dimension Largeur de Fabrication).
ANMERKUNG 3   Übergroße Scheiben — dabei handelt es sich um Scheiben mit der Nennlänge, H, größer als 6 000 mm. Bei diesen Scheiben handelt es sich um Sonderanfertigungen.
EN 572 8 informiert über Floatglas in anderen als in dieser Europäischen Norm aufgeführten Liefer  und Festmaßen.

Verre dans la construction - Produits de base : verre de silicate sodo-calcique - Partie 2 : Glace flottée

La présente Norme européenne détermine les exigences dimensionnelles et les exigences qualitatives minimales (concernant les défauts optiques et les défauts d’aspect) s’appliquant à la glace flottée telle que définie dans le EN 572-1:2012, pour l’utilisation dans la construction.
La présente Norme européenne ne s’applique qu’à la glace flottée fournie en plateaux à largeur de fabrication (voir NOTE 1), en dimensions à largeur de fabrication (voir NOTE 2) et en plateaux grande longueur (voir NOTE 3).
NOTE 1   Jumbo sizes - PLF (plateau largeur de fabrication) - Bandmasse.
NOTE 2   Split sizes - DLF (dimension largeur de fabrication) - Geteilte Bandmasse.
NOTE 3   Plateaux grande longueur - Il s'agit de plateaux dont la longueur nominale, H, est supérieure à 6 000 mm. Ces plateaux font l'objet d'une commande spéciale.
L’EN 572-8 donne des informations sur les glaces flottées fournies dans des dimensions, c'est-à-dire des mesures livrées et des mesures découpées finales, autres que celles couvertes par la présente Norme européenne.

Steklo v gradbeništvu - Osnovni izdelki iz natrij-kalcijevega silikatnega stekla - 2. del: Ravno steklo

Ta evropski standard določa zahteve glede mer in minimalne kakovosti (v zvezi z optičnimi in vizualnimi napakami) za ravno steklo, kot je določeno v standardu FprEN 572-1:2011, za uporabo v gradbeništvu. Ta evropski standard se nanaša le na ravno steklo, dobavljeno v »jumbo« velikostih, razdeljenih ploščah in predimenzioniranih ploščah.

General Information

• Status: Published
• Publication Date: 17-Jul-2012
• Withdrawal Date: 30-Jan-2013
• ICS: 81.040.20 - Glass in building
• Technical Committee: CEN/TC 129 - Glass in building
• Drafting Committee: CEN/TC 129/WG 1 - Basic glass products
• Current Stage: 9060 - Closure of 2 Year Review Enquiry - Review Enquiry
• Start Date: 04-Mar-2018
• Completion Date: 04-Mar-2018
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Directive: 89/106/EEC - Construction products
• Mandate: M/135 - Mandate to CEN/CENELEC concerning the execution of standardization work for harmonized standards on flat glass, profiled glass and glass block products
• Ref Project: SIST EN 572-2:2012 - Glass in building - Basic soda lime silicate glass products - Part 2: Float glass

Relations

• Replaces: EN 572-2:2004 - Glass in Building - Basic soda lime slicate glass products - Part 2: Float glass
• Effective Date: 13-Aug-2011

Overview

EN 572-2:2012 - "Glass in building - Basic soda lime silicate glass products - Part 2: Float glass" (CEN) defines the dimensional and minimum quality requirements for float glass used in building applications. It applies to float glass supplied in jumbo sizes, split sizes, and oversize plates (nominal length H > 6 000 mm are special order). The standard complements EN 572‑1 (definitions and general properties) and EN 572‑8 (supplied and final cut sizes).

Key topics and technical requirements

• Scope & sizes
  • Jumbo: nominal lengths 4 500 mm, 5 100 mm or 6 000 mm; nominal width 3 210 mm (typical).
  • Split sizes: nominal length 1 000–2 550 mm; nominal width 3 210 mm.
  • Oversize plates: H > 6 000 mm (special order).
• Thickness measurement and tolerances
  • Actual thickness = average of four measurements (one at centre of each side) using a caliper micrometer (to 0.01 mm).
  • Tolerances (rounded to 0.1 mm): 2–6 mm ±0.2 mm; 8–12 mm ±0.3 mm; 15 mm ±0.5 mm; 19 & 25 mm ±1.0 mm.
• Length, width and squareness
  • Nominal length and width tolerances: ±5 mm.
  • Squareness limits (difference between diagonals) depend on sheet size and thickness and are specified in the standard.
• Optical faults (distortion)
  • Zebra test: black/white striped screen (25 mm stripes), back-lit, glass at ~4.5 m from screen, observer ~9 m away; required illuminance 400–1 200 lx.
  • Critical viewing angles defined by thickness: for 2 mm glass angle α ≥ 45° (zone D) / 40° (zone d); for ≥3 mm α ≥ 50° / 45°.
• Visual faults
  • Spot faults categorized A–D by halo/defect size: A >0.6–1.5 mm, B >1.5–3.0 mm, C >3.0–9.0 mm, D >9.0 mm.
  • Acceptance levels for jumbo and split sizes are given (examples: category B average 3 per pane, maximum 5 in any jumbo pane; split-size limits use averages per 20 m²).
  • Linear/extended faults acceptance also specified (average basis per 20 t / 20 m² depending on category).
• Measurement methods
  • Annex A defines a projection technique (point-source projector and screen) for measuring spot-fault size (halo included).

Applications and users

• Architects, façade engineers and specifiers selecting float glass for glazing and curtain walls.
• Glass manufacturers and quality control teams ensuring product conformity to European building glazing standards.
• Glaziers, window fabricators and building inspectors who verify dimensional tolerances, optical quality and acceptance criteria during procurement and installation.
• Procurement officers and compliance managers referencing EN 572‑2 in contracts and product data sheets.

Related standards

• EN 572-1:2012 - Definitions and general physical/mechanical properties.
• EN 572-8 - Float glass supplied and final cut sizes.
• Other parts of the EN 572 series (Parts 3–9) cover wired/patterned/glazing types and conformity evaluation.

Keywords: EN 572-2:2012, float glass, soda lime silicate glass, jumbo sizes, split sizes, oversize plates, dimensional tolerances, optical faults, spot faults, zebra test, glazing standard.

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2012
1DGRPHãþD
SIST EN 572-2:2004
Steklo v gradbeništvu - Osnovni izdelki iz natrij-kalcijevega silikatnega stekla - 2.
del: Ravno steklo
Glass in building - Basic soda lime silicate glass products - Part 2: Float glass
Glas im Bauwesen - Basiserzeugnisse aus Kalk-Natronsilicatglas - Teil 2: Floatglas
Verre dans la construction - Produits de base : verre de silicate sodocalcique - Partie 2:
Glace
Ta slovenski standard je istoveten z: EN 572-2:2012
ICS:
81.040.20 Steklo v gradbeništvu Glass in building
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 572-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2012
ICS 81.040.20 Supersedes EN 572-2:2004
English Version
Glass in building - Basic soda lime silicate glass products - Part
2: Float glass
Verre dans la construction - Produits de base : verre de Glas im Bauwesen - Basiserzeugnisse aus Kalk-
silicate sodo-calcique - Partie 2: Glace Natronsilicatglas - Teil 2: Floatglas
This European Standard was approved by CEN on 11 May 2012.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same
status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 572-2:2012: E
worldwide for CEN national Members.

Contents Page
Foreword .3
1 Scope .4
2 Normative references .4
3 Terms and definitions .4
4 Dimensional requirements .5
4.1 Thickness .5
4.1.1 General .5
4.1.2 Tolerances .6
4.2 Length, width and squareness .6
5 Quality requirements .7
5.1 General .7
5.2 Methods of observation and measurement .7
5.2.1 Optical faults .7
5.2.2 Visual faults .8
5.3 Acceptance levels .9
5.3.1 Optical faults .9
5.3.2 Spot faults .9
6 Designation . 10
Annex A (normative) Method for measuring spot fault size (including halo) . 11
A.1 Conditions of observation . 11
A.2 Measurement of the size of the spot fault including the halo . 12
Bibliography . 14

Foreword
This document (EN 572-2:2012) has been prepared by Technical Committee CEN/TC 129 “Glass in building”,
the secretariat of which is held by NBN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by January 2013, and conflicting national standards shall be withdrawn at
the latest by January 2013.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 572-2:2004.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.
This edition is a revision of EN 572-2:2004. The main changes in this edition are:
a) an enlargement of the scope to oversize plates;,
b) a new method of determination of squareness;,
c) a new method of measurement for spot fault (including halo) and an adaptation of the related
requirements.
This European Standard “Glass in building — Basic soda lime silicate glass products” consists of the following
parts:
 Part 1: Definitions and general physical and mechanical properties;
 Part 2: Float glass;
 Part 3: Polished wired glass;
 Part 4: Drawn sheet glass;
 Part 5: Patterned glass;
 Part 6: Wired patterned glass;
 Part 7: Wired or unwired channel shaped glass;
 Part 8: Supplied and final cut sizes;
 Part 9: Evaluation of conformity/Product standard.
According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
1 Scope
This European Standard specifies dimensional and minimum quality requirements (in respect of optical and
visual faults) for float glass, as defined in EN 572-1:2012, for use in building.
This European Standard applies only to float glass supplied in jumbo sizes (see Note 1), split sizes (see
Note 2) and oversize plates (see Note 3).
NOTE 1 Jumbo sizes — PLF (plateau largeur de fabrication) — Bandmasse.
NOTE 2 Split sizes — DLF (dimension largeur de fabrication) — Geteilte Bandmasse.
NOTE 3 Oversize plates – these are plates where the nominal length, H, is greater than 6 000 mm. These plates are
produced to special order.
EN 572-8 gives information on float glass in sizes (i.e. supplied and final cut sizes) other than those covered
by this European Standard.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
EN 572-1:2012, Glass in building — Basic soda lime silicate glass products — Part 1: Definitions and general
physical and mechanical properties
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 572-1:2012 and the following apply.
3.1
length, H, and width, B
defined with reference to the direction of draw of the float glass ribbon as shown in Figure 1

Key
1 direction of draw
Figure 1 — Relationship between length, width and direction of draw
3.2
jumbo sizes
glass delivered in the following sizes:
– nominal length H: 4 500 mm, 5 100 mm or 6 000 mm;
– nominal width B:  3 210 mm
Note 1 to entry: The usual width is 3 210 mm. Exceptional production requirements can cause this to be reduced but
the nominal width is never less than 3 150 mm.
3.3
split sizes
glass delivered in the followi
...