SIST EN ISO 12624:2022

Thermal insulating products for building equipment and industrial installations - Determination of trace quantities of water soluble chloride, fluoride, silicate, sodium ions and pH (ISO 12624:2022)

This standard speci-fies the equipment and procedures for determi-ning trace quantities of the water soluble chloride, fluoride, silicate and sodium ions in an aqueous extract of the product. It also describes a procedure for the determination of the pH of the aqueous extract. The standard is applicable to thermal insula-ting products.
NOTE   The determination of these parameters may be relevant for thermal insula-ting products intended for application to stainless austenitic steel surfa-ces. The presence of chloride, fluoride, silicate and sodium ions under certain conditions may influen-ce the risk of stress corrosion cracking. See informative annex B for further information.

Wärmedämmstoffe für die Haustechnik und für betriebstechnische Anlagen - Bestimmung des Gehalts von wasserlöslichen Chlorid-, Fluorid-, Silikat- und Natrium-Ionen und des pH-Wertes (ISO 12624:2022)

Diese Internationale Norm legt Prüfeinrichtungen und Verfahren zur Bestimmung des Gehalts von wasser-löslichen Chlorid-, Fluorid-, Silikat- und Natrium-Ionen eines wässrigen Extrakts des Produkts fest. Sie beschreibt außerdem ein Verfahren zur Bestimmung des pH-Werts des wässrigen Extrakts. Diese Internationale Norm gilt für Wärmedämmstoffe.
ANMERKUNG Die Bestimmung dieser Parameter kann für Wärmedämmstoffe relevant sein, die zur Anwendung auf Oberflächen aus austenitischem, nichtrostendem Stahl vorgesehen sind. Die Anwesenheit von Chlorid-, Fluorid-, Silikat- und Natrium-Ionen kann unter bestimmten Bedingungen das Risiko der Spannungsrisskorrosion beeinflussen. Siehe Anhang B für weitere Informationen.

Produits isolants thermiques pour l'équipement du bâtiment et les installations industrielles - Détermination des faibles quantités d'ions chlorure, fluorure, silicate et sodium solubles dans l'eau et mesure du pH (ISO 12624:2022)

Le présent document spécifie les équipements nécessaires et les modes opératoires à suivre pour déterminer les faibles quantités d’ions chlorure, fluorure, silicate et sodium solubles dans l’eau, ainsi que le pH d’un extrait aqueux du produit. Il s’applique aux produits isolants thermiques.
NOTE          La détermination de ces paramètres peut s’appliquer aux produits isolants thermiques appliqués sur des surfaces d’acier inoxydable austénitique. La présence d’ions chlorure, fluorure, silicate et sodium sous certaines conditions peut avoir une influence sur les risques de fissuration par corrosion sous contrainte. Voir Annexe B pour plus d’informations sur l’utilisation générale du présent document.

Toplotnoizolacijski proizvodi za opremo stavb in industrijske inštalacije - Ugotavljanje sledi vodotopnih kloridnih, fluoridnih, silikatnih in natrijevih ionov ter vrednosti pH (ISO 12624:2022)

Ta standard določa opremo in postopke za ugotavljanje sledi vodotopnih kloridnih, fluoridnih, silikatnih in natrijevih ionov v vodnem ekstraktu proizvoda. Opisuje tudi postopek za ugotavljanje vrednosti pH vodnega ekstrakta. Standard se uporablja za toplotnoizolacijske proizvode.
OPOMBA: Ugotavljanje teh parametrov je lahko relevantno za toplotnoizolacijske proizvode, namenjene za uporabo pri površinah iz avstenitnega nerjavnega jekla. Prisotnost kloridnih, fluoridnih, silikatnih in natrijevih ionov pod določenimi pogoji lahko vpliva na tveganje pokanja zaradi napetostne korozije. Za dodatne informacije glej informativni dodatek B.

General Information

• Status: Published
• Public Enquiry End Date: 15-Jul-2021
• Publication Date: 09-Oct-2022
• ICS: 91.100.60 - Thermal and sound insulating materials
• Technical Committee: TOP - Thermal insulation
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 26-Sep-2022
• Due Date: 01-Dec-2022
• Completion Date: 10-Oct-2022
• Ref Project: EN ISO 12624:2022 - Thermal insulating products for building equipment and industrial installations - Determination of trace quantities of water-soluble chloride, fluoride, silicate, sodium ions and pH (ISO 12624:2022)

Relations

• Replaces: SIST EN 13468:2002 - Thermal insulating products for building equipment and industrial installations - Determination of trace quantities of water soluble chloride, fluoride, silicate, sodium ions and pH
• Effective Date: 01-Nov-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 12624:2022
01-november-2022
Nadomešča:
SIST EN 13468:2002
Toplotnoizolacijski proizvodi za opremo stavb in industrijske inštalacije -
Ugotavljanje sledi vodotopnih kloridnih, fluoridnih, silikatnih in natrijevih ionov ter
vrednosti pH (ISO 12624:2022)
Thermal insulating products for building equipment and industrial installations -
Determination of trace quantities of water soluble chloride, fluoride, silicate, sodium ions
and pH (ISO 12624:2022)
Wärmedämmstoffe für die Haustechnik und für betriebstechnische Anlagen -
Bestimmung des Gehalts von wasserlöslichen Chlorid-, Fluorid-, Silikat- und Natrium-
Ionen und des pH-Wertes (ISO 12624:2022)
Produits isolants thermiques pour l'équipement du bâtiment et les installations
industrielles - Détermination des faibles quantités d'ions chlorure, fluorure, silicate et
sodium solubles dans l'eau et mesure du pH (ISO 12624:2022)
Ta slovenski standard je istoveten z: EN ISO 12624:2022
ICS:
91.100.60 Materiali za toplotno in Thermal and sound insulating
zvočno izolacijo materials
SIST EN ISO 12624:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 12624:2022

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SIST EN ISO 12624:2022


EN ISO 12624
EUROPEAN STANDARD

NORME EUROPÉENNE

September 2022
EUROPÄISCHE NORM
ICS 91.100.60 Supersedes EN 13468:2001
English Version

Thermal insulating products for building equipment and
industrial installations - Determination of trace quantities
of water-soluble chloride, fluoride, silicate, sodium ions
and pH (ISO 12624:2022)
Produits isolants thermiques pour les équipements de Wärmedämmstoffe für die Haustechnik und für
bâtiments et les installations industrielles - betriebstechnische Anlagen - Bestimmung des Gehalts
Détermination des faibles quantités d'ions chlorure, von wasserlöslichen Chlorid-, Fluorid-, Silikat- und
fluorure, silicate et sodium solubles dans l'eau et Natrium-Ionen und des pH-Wertes (ISO 12624:2022)
mesure du pH (ISO 12624:2022)
This European Standard was approved by CEN on 7 August 2022.

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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 12624:2022 E
worldwide for CEN national Members.

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SIST EN ISO 12624:2022
EN ISO 12624:2022 (E)
Contents Page
European foreword . 3

2

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SIST EN ISO 12624:2022
EN ISO 12624:2022 (E)
European foreword
This document (EN ISO 12624:2022) has been prepared by Technical Committee ISO/TC 163 "Thermal
performance and energy use in the built environment" in collaboration with 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 March 2023, and conflicting national standards shall
be withdrawn at the latest by September 2025.
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.
This document supersedes EN 13468:2001.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. 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 12624:2022 has been approved by CEN as EN ISO 12624:2022 without any modification.

3

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SIST EN ISO 12624:2022

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SIST EN ISO 12624:2022
INTERNATIONAL ISO
STANDARD 12624
Second edition
2022-08
Thermal insulating products for
building equipment and industrial
installations — Determination of trace
quantities of water-soluble chloride,
fluoride, silicate, sodium ions and pH
Produits isolants thermiques pour les équipements de bâtiments et
les installations industrielles — Détermination des faibles quantités
d'ions chlorure, fluorure, silicate et sodium solubles dans l'eau et
mesure du pH
Reference number
ISO 12624:2022(E)
© ISO 2022

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SIST EN ISO 12624:2022
ISO 12624:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© 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 2022 – All rights reserved

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SIST EN ISO 12624:2022
ISO 12624:2022(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 1
5.1 General information. 1
5.2 Preparation of aqueous extracts . 2
5.3 Analyses . . 2
5.4 Materials . 2
6 Test specimens . 3
6.1 General . 3
6.2 Dimensions of test specimens . 3
6.3 Number of test specimens . 3
6.4 Conditioning of test specimens . 3
7 Procedure .3
7.1 Test conditions . 3
7.2 Test procedure . 3
7.2.1 Preparation of the leaching solution . 3
7.2.2 Chloride determination . 4
7.2.3 Fluoride determination . 5
7.2.4 Silicate determination . 5
7.2.5 Sodium determination . 6
7.2.6 pH determination by use of pH meter . 6
8 Calculation and expression of results . 6
8.1 General . 6
−
8.2 Chloride (Cl ) . 6
8.2.1 Ion chromatography . 6
8.2.2 Silver nitrate titration. 7
−
8.3 Fluoride (F ) . 7
− −
8.4 Silicate (SiO ) . 7
3
+
8.5 Sodium (Na ) . 8
8.6 pH . 8
9 Accuracy of measurement.8
10 Test report . 9
Annex A (normative) Spectrophotometric determination of fluoride with zirconium
SPADNS .10
Annex B (informative) General information related to the use of this document .11
Annex C (informative) Example of borosilicate glass equipment to prepare leaching
solutions for thermal insulating products that float .12
iii
© ISO 2022 – All rights reserved

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SIST EN ISO 12624:2022
ISO 12624:2022(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 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 163, Thermal performance and energy use
in the built environment, Subcommittee SC 1, Test and measurement methods, in collaboration with the
European Committee for Standardization (CEN) Technical Committee CEN/TC 88, Thermal insulating
materials and products, in accordance with the Agreement on technical cooperation between ISO and
CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 12624:2011), which has been technically
revised.
The main changes are as follows:
— EN 13468:2001 and ISO 12624:2011 have been merged into one document;
— Clause 3, Terms and definitions, has been added and the numbering of the following clauses has
been changed accordingly;
— editorial revisions.
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 2022 – All rights reserved

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SIST EN ISO 12624:2022
INTERNATIONAL STANDARD ISO 12624:2022(E)
Thermal insulating products for building equipment
and industrial installations — Determination of trace
quantities of water-soluble chloride, fluoride, silicate,
sodium ions and pH
1 Scope
This document specifies the equipment and procedures for determining trace quantities of the water-
soluble chloride, fluoride, silicate and sodium ions in an aqueous extract of the product. It also describes
a procedure for the determination of the pH of the aqueous extract. It is applicable to thermal insulating
products.
NOTE The determination of these parameters can be relevant for thermal insulating products intended
for application to stainless austenitic steel surfaces. The presence of chloride, fluoride, silicate and sodium ions
under certain conditions can influence the risk of stress corrosion cracking. See Annex B for further information
on general use of this document.
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 10136-1, Glass and glassware — Analysis of extract solutions — Part 1: Determination of silicon dioxide
by molecular absorption spectrometry
ISO 10136-2, Glass and glassware — Analysis of extract solutions — Part 2: Determination of sodium oxide
and potassium oxide by flame spectrometric methods
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 Principle
Test specimens of the insulating product are boiled or heated in deionized water to leach out soluble
ions. Tests to determine water-soluble chloride, fluoride, silicate and sodium ions are performed on
aliquots of the filtered aqueous extract. A pH value is determined on one of the aliquots.
5 Apparatus
5.1 General information
All equipment and working instruments used for this purpose shall be free of soluble chloride, fluoride,
silicate, sodium ions and grease. Chloride-free solvents shall be used to clean equipment and working
1
© ISO 2022 – All rights reserved

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SIST EN ISO 12624:2022
ISO 12624:2022(E)
instruments (avoid chlorinated solvents). During the performance of the analytic procedure, extraneous
sources of these ions shall be reduced or eliminated.
5.2 Preparation of aqueous extracts
5.2.1 1 000 ml borosilicate glass flask.
5.2.2 Water condenser.
5.2.3 Heater, conforming to the requirements of 8.2.
5.2.4 Prewashed
...

SLOVENSKI STANDARD
oSIST prEN ISO 12624:2021
01-julij-2021
Toplotnoizolacijski proizvodi za opremo stavb in industrijske inštalacije -
Ugotavljanje sledi vodotopnih klorovih, fluorovih, silikatnih in natrijevih ionov ter
vrednosti pH (ISO/DIS 12624:2021)
Thermal insulating products for building equipment and industrial installations -
Determination of trace quantities of water soluble chloride, fluoride, silicate, sodium ions
and pH (ISO/DIS 12624:2021)
Wärmedämmstoffe für die Haustechnik und für betriebstechnische Anlagen -
Bestimmung des Gehalts von wasserlöslichen Chlorid-, Fluorid-, Silikat- und Natrium-
Ionen und des pH-Wertes (ISO/DIS 12624:2021)
Produits isolants thermiques pour l'équipement du bâtiment et les installations
industrielles - Détermination des faibles quantités d'ions chlorure, fluorure, silicate et
sodium solubles dans l'eau et mesure du pH (ISO/DIS 12624:2021)
Ta slovenski standard je istoveten z: prEN ISO 12624
ICS:
91.100.60 Materiali za toplotno in Thermal and sound insulating
zvočno izolacijo materials
oSIST prEN ISO 12624:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 12624:2021

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oSIST prEN ISO 12624:2021
DRAFT INTERNATIONAL STANDARD
ISO/DIS 12624
ISO/TC 163/SC 1 Secretariat: DIN
Voting begins on: Voting terminates on:
2021-05-13 2021-08-05
Thermal insulating products for building equipment
and industrial installations — Determination of trace
quantities of water soluble chloride, fluoride, silicate,
sodium ions and pH
Produits isolants thermiques — Détermination des faibles quantités d'ions chlorure, fluorure, silicate et
sodium solubles dans l'eau et mesure du pH
ICS: 91.100.60
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 12624:2021(E)
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 SUPPORTING DOCUMENTATION. ISO 2021

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oSIST prEN ISO 12624:2021
EN ISO 12624:2021(X)
ISO/DIS 12624:2021(E)

Contents
Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 1
5.1 Preparation of aqueous extracts . 2
5.2 Analyses . 2
5.3 Materials . 2
6 Test specimens. 2
6.1 General . 2
6.2 Dimensions of test specimens . 3
6.3 Number of test specimens. 3
6.4 Conditioning of test specimens . 3
7 Procedure . 3
7.1 Test conditions . 3
7.2 Test procedure . 3
8 Calculation and expression of results. 6
−
8.1 Chloride (Cl ) . 7
−
8.2 Fluoride (F ) . 7
−−

8.3 Silicate (SiO ) . 8
3
+
8.4 Sodium (Na ) . 8
8.5 pH 8
9 Accuracy of measurement . 8
10 Test report . 9
Annex A (normative) Spectrophotometric determination of fluoride with zirconium
SPADNS . 11
A.1 Principle . 11
A.2 Apparatus . 11
A.3 Reagents . 11
A.4 Calibration . 11
A.5 Procedure . 11
A.6 Interferences . 12
Annex B (informative) General information related to the use of this International
COPYRIGHT PROTECTED DOCUMENT
Standard . 13
© ISO 2021
Annex C (informative) Example of ion chromatography equipment . 14
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
Annex D (informative) Example of borosilicate glass equipment to prepare leaching
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
solutions for thermal insulating products that float . 15
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]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
© ISO 2021 – All rights reserved iii
Published in Switzerland
ii © ISO 2021 – All rights reserved

---------------------- Page: 4 ----------------------
oSIST prEN ISO 12624:2021
ISO/DIS 12624:2021(E)
Contents
Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 1
5.1 Preparation of aqueous extracts . 2
5.2 Analyses . 2
5.3 Materials . 2
6 Test specimens. 2
6.1 General . 2
6.2 Dimensions of test specimens . 3
6.3 Number of test specimens. 3
6.4 Conditioning of test specimens . 3
7 Procedure . 3
7.1 Test conditions . 3
7.2 Test procedure . 3
8 Calculation and expression of results . 6
−
8.1 Chloride (Cl ) . 7
−
8.2 Fluoride (F ) . 7
−−

8.3 Silicate (SiO ) . 8
3
+
8.4 Sodium (Na ) . 8
8.5 pH 8
9 Accuracy of measurement . 8
10 Test report . 9
Annex A (normative) Spectrophotometric determination of fluoride with zirconium
SPADNS . 11
A.1 Principle . 11
A.2 Apparatus . 11
A.3 Reagents . 11
A.4 Calibration . 11
A.5 Procedure . 11
A.6 Interferences . 12
Annex B (informative) General information related to the use of this International
Standard . 13
Annex C (informative) Example of ion chromatography equipment . 14
Annex D (informative) Example of borosilicate glass equipment to prepare leaching
solutions for thermal insulating products that float . 15

© ISO 2021 – All rights reserved iii

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oSIST prEN ISO 12624:2021
ISO/DIS 12624:2021(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 the European Committee of Standardization (CEN) Technical
Committee CEN/TC 88, Thermal insulating materials and products, in collaboration with ISO Technical
Committee ISO/TC 163, Thermal performance and energy use in the built environment, Subcommittee
SC 1, Test and measurement methods, in accordance with the Agreement on technical cooperation
between ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 12624:2011), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— combination of EN 13468:2001 and ISO 12624:2011 in one document;
— Clause 3, Terms and definitions, was added and the numbering of the following clauses was changed
accordingly;
— editorial revision.
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.
This International Standard is one of a series of standards which specify test methods for determining
dimensions and properties of thermal insulating materials and products. The original EN 13468
supports a series of product standards for thermal insulating materials and products which derive from
the Council Directive of 21 December 1988 on the approximation of laws, regulations and
iv © ISO 2021 – All rights reserved

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oSIST prEN ISO 12624:2021
ISO/DIS 12624:2021(E)
administrative provisions of the Member States relating to constructive products (Directive
89/106/EEC) through the consideration of the essential requirements.
This International Standard is one of a series of Standards on test methods for products used to insulate
building equipment and industrial installations which is comprised of the following group of
International Standards:
Respective
ISO standard Title
EN standard
ISO 12623 Thermal insulating products for building equipment and industrial EN 13472:2012
installations — Determination of short-term water absorption by
partial immersion of preformed pipe insulation
ISO 12624 Thermal insulation products — Determination of trace quantities of EN 13468:2001
water soluble chloride, fluoride, silicate, sodium ions and pH
ISO 12628 Thermal insulating products for building equipment and industrial EN 13467:2018
installations — Determination of dimensions, squareness and linearity
of preformed pipe insulation
ISO 12629 Thermal insulating products for building equipment and industrial EN 13469:2012
installations — Determination of water vapour transmission
properties of preformed pipe insulation
ISO 18096 Thermal insulating products for building equipment and industrial EN 14707:2012
installations — Determination of maximum service temperature for
preformed pipe insulation
ISO 18097 Thermal insulating products for building equipment and industrial EN 14706:2012
installations — Determination of maximum service temperature
ISO 18098 Thermal insulating products for building equipment and industrial EN 13470:2001
installations — Determination of the apparent density of preformed
pipe insulation
ISO 18099 Thermal insulating products for building equipment and industrial EN 13471:2001
installations — Determination of the coefficient of thermal expansion

A further series of existing European Standards on test methods was adopted by ISO. This “package” of
standards comprises the following group of interrelated standards:
Respective
ISO standard Title
EN standard
ISO 12344 Thermal insulating products for building applications — EN 12089
Determination of bending behaviour
ISO 12968 Thermal insulation products for building applications — EN 13495
Determination of the pull-off resistance of external thermal insulation

composite systems (ETICS) (foam block test)
ISO 29465 Thermal insulating products for building applications — EN 822
Determination of length and width
ISO 29466 Thermal insulating products for building applications — EN 823
Determination of thickness
ISO 29467 Thermal insulating products for building applications — EN 824
Determination of squareness
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oSIST prEN ISO 12624:2021
ISO/DIS 12624:2021(E)
Respective
ISO standard Title
EN standard
ISO 29468 Thermal insulating products for building applications — EN 825
Determination of flatness
ISO 29469 Thermal insulating products for building applications — EN 826
Determination of compression behaviour
ISO 29470 Thermal insulating products for building applications — EN ISO 29470
Determination of the apparent density
ISO 29471 Thermal insulating products for building applications — EN 1603
Determination of dimensional stability under constant normal
laboratory conditions (23 °C/50 % relative humidity)
ISO 29472 Thermal insulating products for building applications — EN 1604
Determination of dimensional stability under specified temperature
and humidity conditions
ISO 29764 Thermal insulating products for building applications — EN 1605
Determination of deformation under specified compressive load and
temperature conditions
ISO 29765 Thermal insulating products for building applications — EN 1607
Determination of tensile strength perpendicular to faces
Thermal insulating products for building applications —
ISO 29766 EN 1608
Determination of tensile strength parallel to faces
ISO 29767 Thermal insulating products for building applications — EN ISO 29767
Determination of short-term water absorption by partial immersion
ISO 29768 Thermal insulating products for building applications — EN 12085
Determination of linear dimensions of test specimens
ISO 29769 Thermal insulating products for building applications — EN 12430
Determination of behaviour under point load
ISO 29770 Thermal insulating products for building applications — EN 12431
Determination of thickness for floating-floor insulating products
ISO 29771 Thermal insulating materials for building applications — EN 13820
Determination of organic content
ISO 29803 Thermal insulation products for building applications — EN 13497
Determination of the resistance to impact of external thermal
insulation composite systems (ETICS)
ISO 29804 Thermal insulation products for building applications — EN 13494
Determination of the tensile bond strength of the adhesive and of the
base coat to the thermal insulation material
ISO 29805 Thermal insulation products for building applications — EN 13496
Determination of the mechanical properties of glass fibre meshes
ISO 16534 Thermal insulating products for building applications — EN ISO 16534
Determination of compressive creep
ISO 16535 Thermal insulating products for building applications — EN ISO 16535
Determination of long-term water absorption by immersion
ISO 16536 Thermal insulating products for building applications — EN ISO 16536
Determination of long-term water absorption by diffusion
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oSIST prEN ISO 12624:2021
ISO/DIS 12624:2021(E)
Respective
ISO standard Title
EN standard
ISO 16537 Thermal insulating products for building applications — EN 12090
Determination of shear behaviour
ISO 16544 Thermal insulating products for building applications — Conditioning EN 12429
to moisture equilibrium under specified temperature and humidity
conditions
ISO 16545 Thermal insulating products for building applications — EN 13793
Determination of behaviour under cyclic loading
ISO 16546 Thermal insulating products for building applications — EN 12091
Determination of freeze-thaw resistance
This International Standard has been prepared for products used to insulate building equipment and
industrial installations, but it may also be applied to products used in other areas.
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oSIST prEN ISO 12624:2021

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oSIST prEN ISO 12624:2021
DRAFT INTERNATIONAL STANDARD ISO/DIS 12624:2021(E)
Thermal insulating products for building equipment and
industrial installations — Determination of trace quantities of
water soluble chloride, fluoride, silicate, sodium ions and pH
1 Scope
This International Standard specifies the equipment and procedures for determining trace quantities of
the water soluble chloride, fluoride, silicate and sodium ions in an aqueous extract of the product. It also
describes a procedure for the determination of the pH of the aqueous extract. This International
Standard is applicable to thermal insulating products.
NOTE The determination of these parameters may be relevant for thermal insulating products intended for
application to stainless austenitic steel surfaces. The presence of chloride, fluoride, silicate and sodium ions under
certain conditions can influence the risk of stress corrosion cracking. See Annex B for further information.
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 10136-1, Glass and glassware — Analysis of extract solutions — Part 1: Determination of silicon
dioxide by molecular absorption spectrometry
ISO 10136-2, Glass and glassware — Analysis of extract solutions — Part 2: Determination of sodium
oxide and potassium oxide by flame spectrometric methods
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
4 Principle
Test specimens of the insulating product are boiled or heated in deionized water to leach out soluble
ions. Tests to determine water soluble chloride, fluoride, silicate and sodium ions are performed on
aliquots of the filtered aqueous extract. A pH value is determined on one of the aliquots.
5 Apparatus
All equipment and working instruments used for this purpose shall be free of soluble chloride, fluoride,
silicate, sodium ions, and grease. Chloride-free solvents shall be used to clean equipment and working
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oSIST prEN ISO 12624:2021
ISO/DIS 12624:2021(E)
instruments (avoid chlorinated solvents). During the performance of the analytic procedure, extraneous
sources of these ions shall be reduced or eliminated.
5.1 Preparation of aqueous extracts
5.1.1 1 000 ml borosilicate glass flask.
5.1.2 Water condenser.
5.1.3 Heater, complying with the requirements of 8.2.
5.1.4 Prewashed filter, diameter of pores 0,45 µm.
5.1.5 Cork borer, having a diameter which enables taking the specified mass for the test specimen.
5.1.6 Disposable gloves.
5.1.7 Plastic bag or container.
5.1.8 Balance, permitting reading to ± 0,01 g.
5.2 Analyses
5.2.1 Ion chromatography equipment (IC). See Annex C for an example of suitable equipment.
5.2.2 Titration equipment with automatic end point.
5.2.3 Atomic Absorption Spectrophotometer (AAS).
5.2.4 Atomic Emission Spectrometer with Inductively Coupled Plasma (ICP-AES).
5.2.5 Spectrophotometer.
5.2.6 pH meter/millivolt meter.
5.2.7 Fluoride ion selective electrode.
NOTE Any device providing the same result with at least the same accuracy can be used.
5.3 Materials
5.3.1 Deionized water, conductivity less than 0,5 µS/cm.
5.3.2 0,01 N sodium chloride (NaCl).
5.3.3 0,01 N silver nitrate (AgNO ).
3
6 Test specimens
6.1 General
To ensure that the results are representative of the product, care shall be taken that the test specimens
are not subjected to any outside contamination.
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