EN 14178-1:2004

Glass in building - Basic alkaline earth silicate glass products - Part 1: Float glass

This document defines and classifies basic alkaline earth silicate glasses for use in building. It indicates their chemical composition, main physical and mechanical properties, dimensional and minimum quality requirements (in respect of optical and visual faults).
This document applies to basic alkaline earth silicate glasses supplied in jumbo sizes, split sizes and final cut sizes.
This document does not apply to final cut sizes having a dimension less than 100mm or a surface area less than 0,05m².

Glas im Bauwesen - Basiserzeugnisse aus Erdalkali-Silicatglas - Teil 1: Floatglas

Diese Europäische Norm definiert und klassifiziert Basiserzeugnisse aus Erdalkali-Silicatglas für die Verwendung im Bauwesen. Sie enthält Angaben zu deren chemischer Zusammensetzung, den wesentlichen physikalischen und mechanischen Eigenschaften sowie zu Anforderungen an die Maße und Mindestanforderungen an die Qualität (in Bezug auf optische und sichtbare Fehler).
Diese Europäische Norm gilt für Basiserzeugnisse aus Erdalkali-Silicatglas, die in Bandmaßen, geteilten Bandmaßen und in Festmaßen geliefert werden.
Diese Europäische Norm gilt nicht für Festmaße, bei denen mindestens eine Kantenlänge weniger als 100 mm beträgt oder mit einer Oberfläche kleiner als 0,05 m2.

Verre dans la construction - Verre de silicate alcalinoterreux de base - Partie 1: Glace flottée

La présente Norme européenne définit et classe les verres de silicate alcalinoterreux de base utilisés dans la construction. Elle spécifie leur composition chimique, leurs caractéristiques physiques et mécaniques principales ainsi que leurs exigences minimales en matière de dimension et de qualité (pour ce qui concerne les défauts optiques et visuels).
La présente Norme européenne s'applique aux verres de silicate alcalinoterreux de base en tailles "jumbo", tailles intermédiaires et en dimensions découpées finales.
La présente Norme européenne ne s'applique pas aux dimensions découpées finales dont la dimension est inférieure à 100 mm ni aux superficies inférieures à 0,05 m2.

Steklo v stavbah - Osnovni izdelki iz zemljoalkalijskega silikatnega stekla – 1. del: Ravno steklo

General Information

• Status: Published
• Publication Date: 12-Oct-2004
• Withdrawal Date: 29-Apr-2005
• 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: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 13-Oct-2004
• Completion Date: 13-Oct-2004
• 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 14178-1:2005 - Glass in building - Basic alkaline earth silicate glass products - Part 1: Float glass

Relations

• Revised: prEN 14178-1 - Glass in building - Basic alkaline earth silicate glass products - Part 1: Float glass
• Effective Date: 18-Jan-2023

Overview

EN 14178-1:2004 - Glass in building: Basic alkaline earth silicate glass products - Part 1: Float glass is a CEN standard that defines, classifies and sets minimum requirements for basic alkaline earth silicate float glass used in building applications. The standard covers chemical composition, principal physical and mechanical characteristics, dimensional tolerances and minimum optical and visual quality acceptance levels for glass supplied in jumbo sizes, split sizes and final cut sizes (excluding final cut pieces under 100 mm or 0.05 m²).

Key topics and requirements

• Scope and definitions: Terms such as basic alkaline earth silicate glass, jumbo sizes, split sizes and final cut sizes are defined to ensure consistent specification and testing.
• Chemical composition: Typical constituent ranges are given (example: SiO2 55–70%, CaO 3–12%, K2O 5–14%, Al2O3 0–15%, ZrO2 0–8%, BaO/SrO 1–15%, others 0–10%).
• Physical & mechanical properties: Conventional design values are listed (density ≈ 2700 kg/m³, Young’s modulus ≈ 7.7×10¹⁰ Pa, refractive index ≈ 1.5, thermal expansion ~8×10⁻⁶/K). These are reference values for use in calculations where high precision is not required.
• Optical classification: Criteria for clear (untinted) glass are set using light transmittance measured per EN 410; mean transmittance thresholds are provided by nominal thickness to determine clear glass.
• Dimensional tolerances: Thickness measurement method, tolerances by nominal thickness, and length/width/squareness tolerances for jumbo, split and final cut sizes are specified.
• Quality and inspection:
  • Optical faults (measured with a zebra screen test) and visual faults (spot faults, linear/extended faults, edge defects) are described with observation conditions, measurement methods and acceptance levels.
  • Spot fault categories by nucleus size and rules for inspection distance/lighting ensure reproducible quality assessment.
• Referenced design guidance: The standard refers to other documents (e.g., EN 410, prEN 13474) for specific testing and design methods.

Applications and users

EN 14178-1:2004 is used by:

• Glass manufacturers for product classification and production quality control.
• Architects, façade and structural engineers for specifying float glass performance and transparency.
• Glazing contractors and fabricators for acceptance checks on jumbo/split/final-cut glass.
• QA/QC inspectors and testing labs for standardized optical and visual inspections prior to installation or further processing (tempering, insulating units).

Related standards

• EN 410 - Determination of luminous and solar characteristics of glazing (normative reference)
• prEN 13474 - Design method related to characteristic bending strength (referenced)

Keywords: EN 14178-1:2004, float glass, alkaline earth silicate glass, glass in building, optical faults, dimensional tolerances, jumbo sizes, split sizes, EN 410.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Steklo v stavbah - Osnovni izdelki iz zemljoalkalijskega silikatnega stekla – 1. del: Ravno stekloGlas im Bauwesen - Basiserzeugnisse aus Erdalkali-Silicatglas - Teil 1: FloatglasVerre dans la construction - Verre de silicate alcalinoterreux de base - Partie 1: Glace flottéeGlass in building - Basic alkaline earth silicate glass products - Part 1: Float glass81.040.20Steklo v gradbeništvuGlass in buildingICS:Ta slovenski standard je istoveten z:EN 14178-1:2004SIST EN 14178-1:2005en01-marec-2005SIST EN 14178-1:2005SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14178-1October 2004ICS 81.040.20 English versionGlass in building - Basic alkaline earth silicate glass products -Part 1: Float glassVerre dans la construction - Verre de silicate alcalinoterreuxde base - Partie 1: Glace flottéeGlas im Bauwesen - Basiserzeugnisse aus Erdalkali-Silicatglas - Teil 1: FloatglasThis European Standard was approved by CEN on 27 May 2004.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14178-1:2004: ESIST EN 14178-1:2005

Figure 1 — Relationship between length, width and direction of draw 3.3 jumbo sizes glass delivered in the following sizes: SIST EN 14178-1:2005

Nominal length H: 4500 mm, 5100 mm or 6000 mm
Nominal width B: 3210 mm NOTE The usual width is 3210 mm. Exceptional production requirements may cause this to be reduced but the nominal width is never below 3150 mm 3.4 split sizes glass delivered in the following size ranges:
Nominal length H: 1000 mm to 2550 mm
Nominal width B: 3210 mm NOTE The usual width is 3210 mm. Exceptional production requirements may cause this to be reduced but the nominal width is never below 3150 mm. 3.5 final cut size pane of glass that has been cut down to the dimensions being required either for installation or processing into a final product e.g. insulating glass units, thermally toughened safety glass, …of those dimensions 3.6 optical faults these are faults that lead to distortions in the appearance of objects observed trough the glass 3.7 visual faults faults, which alter the visual quality of the glass. They are spot faults and linear / extend faults 3.8 spot faults a spot fault is a nucleus, which is sometimes accompanied by a halo of distorted glass. The dimension of a spot fault comprising a nucleus with a halo is obtained by multiplying the dimension of the nucleus by a factor of approximately 3 3.9 linear / extended faults these faults can be on or in the glass, in the form of deposits, marks or scratches that occupy an extended length or area 3.10 edge defects these defects can occur on the edge of a cut size piece in the form of entrant and emergent faults and / or bevels 4 Chemical composition 4.1 Principal constituents The magnitude of the proportions by mass of the principal constituents of all the alkaline earth silicate glass products covered by this document is as follows:
Silicon Dioxide
SiO2
55 - 70 %
Calcium Oxide
CaO
3 - 12% SIST EN 14178-1:2005
Potassium Oxide
K2O
5- 14%
Aluminium Oxide
Al2O3
0 - 15 %
Zirconium Oxide
ZrO2
0– 8 %
Strontium Oxide
SrO
Barium Oxide
BaO
1– 15 %
Others
0 – 10 % 4.2 Tint Body tinted glass is obtained by the addition of suitable materials. 5 Physical and mechanical characteristics 5.1 General characteristics Conventional numerical values for the physical and mechanical characteristics of basic alkaline earth silicate glass products are given in Table 1. These values, for normal annealed glass without any further toughening, are not precise requirements with which the glass shall strictly comply, but are the generally accepted figures for use in calculations where a high degree of accuracy is not required.
Table 1 — General characteristic values of alkaline earth silicate glass Characteristic Symbol Value and unit Density (at 18oC) ρ 2700 kg/m3 Hardness (Knoop) HK0,1/20 5 – 6 Gpa Young's modulus (modulus of elasticity) E 7,7 x 1010 Pa
Poisson's ratio µ 0,2 Characteristic bending strength fg,kkkk 45 x 106 Pa [1] Specific heat capacity cp 0,7 x 103 J/(kg
...