EN ISO 4803:2023

SLOVENSKI STANDARD
01-maj-2023
Laboratorijska steklovina - Borosilikatne steklene cevi (ISO 4803:2021)
Laboratory glassware - Borosilicate glass tubing (ISO 4803:2021)
Laborgeräte aus Glas - Rohre aus Borosilicatglas (ISO 4803:2021)
Verrerie de laboratoire - Tubes en verre borosilicaté (ISO 4803:2021)
Ta slovenski standard je istoveten z: EN ISO 4803:2023
ICS:
71.040.20 Laboratorijska posoda in Laboratory ware and related
aparati apparatus
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 4803
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2023
EUROPÄISCHE NORM
ICS 71.040.20
English Version
Laboratory glassware - Borosilicate glass tubing (ISO
4803:2021)
Verrerie de laboratoire - Tubes en verre borosilicaté Laborgeräte aus Glas - Rohre aus Borosilicatglas (ISO
(ISO 4803:2021) 4803:2021)
This European Standard was approved by CEN on 10 March 2023.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4803:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
The text of ISO 4803:2021 has been prepared by Technical Committee ISO/TC 48 "Laboratory
equipment” of the International Organization for Standardization (ISO) and has been taken over as
which is held by DIN.
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 September 2023, and conflicting national standards
shall be withdrawn at the latest by September 2023.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 4803:2021 has been approved by CEN as EN ISO 4803:2023 without any modification.

INTERNATIONAL ISO
STANDARD 4803
Second edition
2021-10
Laboratory glassware — Borosilicate
glass tubing
Verrerie de laboratoire — Tubes en verre borosilicaté
Reference number
ISO 4803:2021(E)
ISO 4803:2021(E)
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 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
iii
ISO 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 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 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 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 alkali-earth 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 are needed.
v
INTERNATIONAL STANDARD ISO 4803:2021(E)
Laboratory glassware — Borosilicate glass tubing
1 Scope
This document specifies requirements for borosilicate 3,3 glass tubing according to ISO 3585 for
laboratory apparatus in an outer diameter range from 4 mm to 300 mm. This document defines
dimensions, material, denomination, designation, requirements and inspection methods.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
ISO 719, Glass — Hydrolytic resistance of glass grains at 98 °C — Method of test and classification
ISO 3585, Borosilicate glass 3.3 — Properties
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Designation
Tubing shall be designated by type of glass, outer diameter, wall thickness and name of the man
...