ISO/FDIS 4803

Laboratory glassware -- Borosilicate glass tubing

Verrerie de laboratoire -- Tubes en verre borosilicaté

General Information

• Status: Published
• ICS: 71.040.20 - Laboratory ware and related apparatus
• Technical Committee: ISO/TC 48 - Laboratory equipment
• Drafting Committee: ISO/TC 48/WG 6 - Non-volumetric glass and plastic ware
• Current Stage: 5020 - FDIS ballot initiated: 2 months. Proof sent to secretariat
• Start Date: 17-Jun-2021
• Completion Date: 17-Jun-2021

RELATIONS

• Revised: ISO 4803:1978 - Laboratory glassware -- Borosilicate glass tubing
• Effective Date: 11-Nov-2017

Standards Content (sample)

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 4803
ISO/TC 48
Laboratory glassware — Borosilicate
Secretariat: DIN
glass tubing
Voting begins on:
2021­06­17
Verrerie de laboratoire — Tubes en verre borosilicaté
Voting terminates on:
2021­08­12
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/FDIS 4803:2021(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. ISO 2021
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ISO/FDIS 4803:2021(E)
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© ISO 2021

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ii © ISO 2021 – All rights reserved
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ISO/FDIS 4803:2021(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Designation ................................................................................................................................................................................................................ 1

5 Material .......................................................................................................................................................................................................................... 1

5.1 General ........................................................................................................................................................................................................... 1

5.2 Hydrolytic resistance ......................................................................................................................................................................... 1

5.3 Thermal coefficient of expansion ............................................................................................................................................ 1

6 Range of sizes and tolerances ................................................................................................................................................................. 2

6.1 Diameter and wall thickness ....................................................................................................................................................... 2

6.1.1 Determination of outer diameter ...................................................................................................................... 2

6.1.2 Determination of wall thickness ........................................................................................................................ 2

6.2 Wall thickness difference (Siding) ......................................................................................................................................... 2

6.3 Length ............................................................................................................................................................................................................. 2

6.4 Straightness ............................................................................................................................................................................................... 2

6.5 Ovality ............................................................................................................................................................................................................. 4

Bibliography ................................................................................................................................................................................................................................ 8

© ISO 2021 – All rights reserved iii
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ISO/FDIS 4803:2021(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 non­governmental, 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 of 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 www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 48, Laboratory equipment.

This second edition cancels and replaces the first edition (ISO 4803:1978), which has been technically

revised.
The main changes compared to the previous edition are as follows:
— update of the dimensions and tolerances;

— inclusion of a comprehensive and precise description of the mentioned quality characteristics and

determination methods.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2021 – All rights reserved
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ISO/FDIS 4803:2021(E)
Introduction

Borosilicate glass is a class of glass, which is classified in ISO 12775. Borosilicate glasses show

properties such as a very high hydrolytic resistance, a very high acid resistance and a medium alkali

resistance. Borosilicate glasses can contain alkali earths or be free of alkali earths. The alkali­earth free

−6 −1

borosilicate glasses have a very low coefficient of mean linear thermal expansion alpha of 3,3 × 10 K

(in the temperature range from 20 °C to 300 °C). They were first developed in 1887 and constitute since

then an industrial standard, which is reflected by the standardization of the composition, chemical and

physical properties of the material in ISO 3585.

These special characteristics make this glass preferable for technical purposes with high chemical and

thermo shock resistance. The field of application is mainly laboratories for chemical, pharmaceutical

and food industries as well as other technical applications where these properties

...