ISO 16293-2:2017

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

ISO 16293-2:2017 specifies dimensional and minimum quality requirements (in respect of optical and visual faults) for float glass for use in building, as defined in ISO 16293‑1. ISO 16293-2:2017 applies to float glass supplied in stock sizes and final cut sizes.

Verre dans la construction — Verre de silicate sodocalcique — Partie 2: Glace

General Information

• Status: Published
• Publication Date: 29-Mar-2017
• ICS: 81.040.20 - Glass in building
• Technical Committee: ISO/TC 160/SC 1 - Product considerations
• Drafting Committee: ISO/TC 160/SC 1/WG 1 - Basic glass products
• Current Stage: 9092 - International Standard to be revised
• Completion Date: 21-Jun-2022

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 16293-2
First edition
2017-03
Glass in building — Basic soda lime
silicate glass products —
Part 2:
Float glass
Verre dans la construction — Verre de silicate sodocalcique —
Partie 2: Glace
Reference number
ISO 16293-2:2017(E)
©
ISO 2017

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ISO 16293-2:2017(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
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ii © ISO 2017 – All rights reserved

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ISO 16293-2:2017(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Dimensional requirements . 3
4.1 Thickness . 3
4.1.1 General. 3
4.1.2 Tolerances . 3
4.2 Length, width and squareness . 4
4.2.1 Jumbo and split sizes . 4
4.2.2 Supplied and final cut sizes . 4
5 Quality requirements . 5
5.1 General . 5
5.2 Methods of observation and measurement . 5
5.2.1 Optical faults . 5
5.2.2 Visual faults . 6
5.2.3 Edge defects for final cut sizes . 7
5.3 Acceptance levels . 8
5.3.1 Optical faults . 8
5.3.2 Spot faults . 8
5.3.3 Linear/extended faults . 8
5.3.4 Edge defects for final cut sizes . 9
6 Designation . 9
Annex A (informative) Method for measuring the halo size of spot fault .10
Bibliography .12
© ISO 2017 – All rights reserved iii

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ISO 16293-2:2017(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO’s adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: w w w . i s o .org/ iso/ foreword .html.
The committee responsible for this document is ISO/TC 160, Glass in building, Subcommittee SC 1,
Product considerations.
A list of all parts in the ISO 16293 series can be found on the ISO website.
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INTERNATIONAL STANDARD ISO 16293-2:2017(E)
Glass in building — Basic soda lime silicate glass
products —
Part 2:
Float glass
1 Scope
This document specifies dimensional and minimum quality requirements (in respect of optical and
visual faults) for float glass for use in building, as defined in ISO 16293-1.
This document applies to float glass supplied in stock sizes and final cut sizes.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 16293-1 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at http:// www .iso .org/ obp
3.1
length
H
dimension of the straight edge of the glass parallel to the direction of draw of the glass ribbon
Note 1 to entry: See Figure 1.
[SOURCE: ISO 11485-1:2011, 2.26, modified]
l
H
Key
l direction of draw
H length
B width
Figure 1 — Relationship between length, width and direction of draw
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B

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ISO 16293-2:2017(E)

3.2
width
B
dimension of the edge of the glass perpendicular to the direction of the glass ribbon
Note 1 to entry: See Figure 1.
3.3
stock sizes
glass sizes that are intended to be re-cut to obtain final cut sizes (3.7)
Note 1 to entry: Stock sizes can be jumbo sizes, split sizes or supplied sizes.
3.4
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 below 3 150 mm.
Note 2 to entry: The usual maximum length is 6 000 mm. Oversize plates where the nominal length, H, is greater
than 6 000 mm, can be produced to special order.
3.5
split sizes
glass delivered in the following size ranges:
   Nominal length H: 1 000 mm to 2 550 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 below 3 150 mm.
3.6
supplied size
pane of glass that has been supplied as raw material for cutting down to a size for installation, delivered
in the following size ranges:
   Nominal length H: any;
   Nominal width B: <3 210 mm
Note 1 to entry: In some cases, nominal width can be B < 3 810 mm
3.7
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
Note 1 to entry: The minimum final cut size shall have dimensions H or B not less than 100 mm and a minimum
2
surface area of not less than 0,05m .
3.8
optical faults
faults which lead to distortions in the appearance of objects observed through the glass
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ISO 16293-2:2017(E)

3.9
visual faults
faults which alter the visual quality of the glass
Note 1 to entry: Visual faults include spot faults and linear/extended faults.
3.10
spot fault
defect in the glass having a limited size and being composed of a nucleus, which can be accompanied by
a halo (3.11) of distorted glass
3.11
halo
area of glass locally distorted, generally around a nucleus
3.12
linear/extended faults
faults which can be on or in the glass, in the form of deposits, marks or scratches that occupy an
extended length or area
3.13
edge defect
defect which can occur on the edge of a glass sheet in the form of entrant and emergent faults
and/or bevels
4 Dimensional requirements
4.1 Thickness
4.1.1 General
The actual thickness shall be the average of four measurements, taken to the nearest 0,01 mm
...