EN ISO 23766:2024

Thermal insulating products for industrial installations - Determination of the coefficient of linear thermal expansion at sub-ambient temperatures (ISO 23766:2022)

This document specifies the equipment and procedures for determining the coefficient of linear thermal expansion at sub-ambient temperatures (−196 °C to 25 °C), subject to the possible temperature limitation of the test specimens. It is not applicable to products which experience dimensional changes during the test due to the loss of hydration water or which undergo other phase changes.

Wärmedämmstoffe für Industrieanlagen - Bestimmung des linearen Wärmeausdehnungskoeffizienten bei Temperaturen unterhalb der Umgebungstemperatur (ISO 23766:2022)

Produits isolants thermiques pour les installations industrielles - Détermination du coefficient de dilatation thermique linéique à des températures inférieures à la température ambiante (ISO 23766:2022)

Produits isolants thermiques pour les installations industrielles — Détermination du coefficient de dilatation thermique linéique à des températures inférieures à la température ambiante

Toplotnoizolacijski proizvodi za industrijske inštalacije - Določanje koeficienta linearne toplotne razteznosti pri temperaturah pod temperaturo okolja (ISO 23766:2022)

General Information

• Status: Published
• Publication Date: 07-May-2024
• ICS: 91.100.60 - Thermal and sound insulating materials
• Technical Committee: CEN/TC 88 - Thermal insulating materials and products
• Drafting Committee: CEN/TC 88/WG 10 - Building equipment and industrial installations
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 08-May-2024
• Due Date: 21-Dec-2025
• Completion Date: 08-May-2024
• Ref Project: SIST EN ISO 23766:2024 - Thermal insulating products for industrial installations - Determination of the coefficient of linear thermal expansion at sub-ambient temperatures (ISO 23766:2022)

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2024
Toplotnoizolacijski proizvodi za industrijske inštalacije - Določanje koeficienta
linearne toplotne razteznosti pri temperaturah pod temperaturo okolja (ISO
23766:2022)
Thermal insulating products for industrial installations - Determination of the coefficient of
linear thermal expansion at sub-ambient temperatures (ISO 23766:2022)
Wärmedämmstoffe für Industrieanlagen - Bestimmung des linearen
Wärmeausdehnungskoeffizienten bei Temperaturen unterhalb der
Umgebungstemperatur (ISO 23766:2022)
Produits isolants thermiques pour les installations industrielles - Détermination du
coefficient de dilatation thermique linéique à des températures inférieures à la
température ambiante (ISO 23766:2022)
Ta slovenski standard je istoveten z: EN ISO 23766:2024
ICS:
91.100.60 Materiali za toplotno in Thermal and sound insulating
zvočno izolacijo materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 23766
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2024
EUROPÄISCHE NORM
ICS 91.100.60
English Version
Thermal insulating products for industrial installations -
Determination of the coefficient of linear thermal
expansion at sub-ambient temperatures (ISO 23766:2022)
Produits isolants thermiques pour les installations Wärmedämmstoffe für Industrieanlagen - Bestimmung
industrielles - Détermination du coefficient de des linearen Wärmeausdehnungskoeffizienten bei
dilatation thermique linéique à des températures Temperaturen unterhalb der Umgebungstemperatur
inférieures à la température ambiante (ISO (ISO 23766:2022)
23766:2022)
This European Standard was approved by CEN on 5 May 2024.

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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 23766:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
The text of ISO 23766:2022 has been prepared by Technical Committee ISO/TC 163 "Thermal
performance and energy use in the built environment” of the International Organization for
Standardization (ISO) and has been taken over as EN ISO 23766:2024 by Technical Committee CEN/TC
88 “Thermal insulating materials and products” the secretariat of 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 November 2024, and conflicting national standards
shall be withdrawn at the latest by November 2024.
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 23766:2022 has been approved by CEN as EN ISO 23766:2024 without any modification.

INTERNATIONAL ISO
STANDARD 23766
First edition
2022-03
Thermal insulating products
for industrial installations —
Determination of the coefficient of
linear thermal expansion at sub-
ambient temperatures
Produits isolants thermiques pour les installations industrielles —
Détermination du coefficient de dilatation thermique linéique à des
températures inférieures à la température ambiante
Reference number
ISO 23766:2022(E)
ISO 23766:2022(E)
© ISO 2022
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: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 23766:2022(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Method A — Optical method .1
4.1 Principle . 1
4.2 Apparatus . 2
4.2.1 Light source system . 2
4.2.2 Light detector system . 2
4.2.3 Test chamber and cooling system . 2
4.2.4 Temperature-measuring instruments . 3
4.2.5 Equipment to prepare the test specimen . 3
4.3 Test specimen . 3
4.3.1 Dimensions of test specimens . 3
4.3.2 Preparation of test specimens . 3
4.3.3 Number of test specimens . . 3
4.4 Conditioning of test specimens . 3
4.5 Procedure . 4
5 Method B — Displacement method . 4
5.1 Principle . 4
5.2 Apparatus . 5
5.2.1 Sensor for distance . 5
5.2.2 Test chamber and cooling system . 5
5.2.3 Temperature-measuring instruments . 5
5.2.4 Equipment to prepare the test specimen . 5
5.3 Test specimen . 5
5.3.1 Dimensions of test specimens . 5
5.3.2 Preparation of test specimens . 5
5.3.3 Number of test specimens . . 6
5.4 Conditioning of test specimens . 6
5.5 Procedure . 6
6 Calculation and expression of results . 6
7 Accuracy of measurement.7
8 Test report . 7
Bibliography . 9
iii
ISO 23766:2022(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 t
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