ISO 22482:2021

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 22482
ISO/TC 163/SC 3
Thermal insulation products —
Secretariat: SCC
Aerogel blankets for buildings —
Voting begins on:
2021­09­01 Determination of physical properties
Voting terminates on:
2021­10­27
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 22482:2021(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 22482:2021(E)

COPYRIGHT PROTECTED DOCUMENT
© 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
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ii © ISO 2021 – All rights reserved

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ISO/FDIS 22482:2021(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, symbols and abbreviated terms . 2
3.1 Terms and definitions . 2
3.2 Symbols and units . 2
3.3 Abbreviated terms . 2
3.3.1 Abbreviated terms . 2
3.3.2 Abbreviated terms for declared properties . 3
4 Requirements . 3
4.1 General . 3
4.2 For all applications . 3
4.2.1 Linear dimensions . 3
4.2.2 Density . 4
4.2.3 Thermal conductivity . . 4
4.3 Specific applications . 4
4.3.1 Reaction to fire . 4
4.3.2 Water absorption . . 4
4.3.3 Compressive strength . 4
4.3.4 Corrosiveness to steel . 5
4.3.5 Resistance to fungi . 5
4.3.6 Flexibility . 5
5 Test methods . 5
5.1 Sampling . 5
5.2 Conditioning . 6
5.3 Testing . 6
5.3.1 General. 6
5.3.2 Thermal conductivity . . 6
6 Designation code . 7
7 Evaluation of conformity . 7
8 Marking and labelling . 7
Annex A (normative) Factory production control . 9
Annex B (normative) Determination of the aged values of thermal conductivity due to moisture .10
Annex C (normative) Determination of the thermal conductivity in relation to moisture content 12
Bibliography .14
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ISO/FDIS 22482:2021(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 163, Thermal performance and energy use
in the built environment, Subcommittee SC 3, Thermal insulation products, components and systems.
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.
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ISO/FDIS 22482:2021(E)

Introduction
Aerogel insulations are widely used globally because of their superior properties including ease of
handling and effective insulating performance. Testing of aerogel insulation to meet sustainable
construction needs provides users with a basis for choosing the insulation.
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FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 22482:2021(E)
Thermal insulation products — Aerogel blankets for
buildings — Determination of physical properties
1 Scope
This document specifies the requirements for factory-made aerogel blankets, which are used for the
thermal insulation of building applications. This document specifies insulation that exhibits thermal
insulating performance through high porosity and nano-sized pores by compounding aerogel with net-
like fibrous material, e.g. polyester, glass fibre, ceramic fibre. The products are delivered as a blanket
type.
This document describes product characteristics and includes procedures for testing, evaluation of
conformity and marking and labelling.
This document does not specify the required level of a given property to be achieved by a product to
demonstrate fitness for purpose in a particular application.
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 846:2019, Plastics — Evaluation of the action of microorganisms
ISO 8301, Thermal insulation — Determination of steady-state thermal resistance and related properties —
Heat flow meter apparatus
ISO 8302, Thermal insulation — Determination of steady-state thermal resistance and related properties —
Guarded hot plate apparatus
ISO 10456, Building materials and products — Hygrothermal properties — Tabulated design values and
procedures for determining declared and design thermal values
ISO 12576­1, Thermal insulation — Insulating materials and products for buildings — Conformity control
systems — Part 1: Factory-made products
ISO 12624, Thermal insulating products for building equipment and industrial installations —
Determination of trace quantities of water soluble chloride, fluoride, silicate, sodium ions and pH
ISO 16535, Thermal insulating products for building applications — Determination of long-term water
absorption by immersion
ISO 29465, Thermal insulating products for building applications — Determination of length and width
ISO 29466, Thermal insulating products for building applications — Determination of thickness
ISO 29469, Thermal insulating products for building applications — Determination of compression
behaviour
ISO 29470, Thermal insulating products for building applications — Determination of the apparent density
ISO 29767, Thermal insulating products for building applications — Determination of short-term water
absorption by partial immersion
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ISO/FDIS 22482:2021(E)

3 Terms, definitions, symbols and abbreviated terms
For the purposes of this document, the following terms and definitions apply.
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 https:// www .electropedia .org/
3.1 Terms and definitions
3.1.1
aerogel
insulating material that has high porosity derived from a nanoporous structure formed by replacement
of the liquid component of a gel with air
3.1.2
aerogel blanket
aerogel insulation which has been made into a blanket by combining aerogel (3.1.1) with a flexible
matrix material as carrier
3.2 Symbols and units
Symbol Quantity Unit
b width mm
L length mm
t thickness mm
λ thermal conductivity W/(m·K)
Δλ ageing increment of thermal conductivity (λ ­ λ ) W/(m·K)
a a i
λ declared thermal conductivity as determined by ISO 10456, and W/(m·K)
D
expressed with two significant digits
λ time averaged value of thermal conductivity over 25 years W/(m·K)
a
λ mean thermal conductivity W/(m·K)
mean
λ mean of the aged values of thermal conductivity W/(m·K)
mean,a
λ mean of the initial values of thermal conductivity W/(m·K)
mean,i
λ 90 % fractile with a confidence level of 90 % for the thermal W/(m·K)
90/90
conductivity
k factor related to the number of test results of aged thermal ­
a
conductivity
k factor related to the number of test results of initial thermal ­
i
conductivity
s estimate of the standard deviation of the thermal conductivity W/(m·K)
λ
s estimate of the standard deviation of the aged values of thermal W/(m·K)
λ,a
conductivity
s estimate of the standard deviation of the initial values of ther­ W/(m·K)
λ,i
mal conductivity
3.3 Abbreviated terms
3.3.1 Abbreviated terms
Abbreviated term Meaning
ABI Aerogel blanket insulation
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ISO/FDIS 22482:2021(E)

Abbreviated term Meaning
ITT Initial type test
FPC Factory production control
3.3.2 Abbreviated terms for declared properties
Abbreviated term Declared property
CS(Y) Declared level for compressive strength
CS(10) Declared level for compressive strength at 10 % deformation
Cl Declared level for chloride content
T Declared level for thickness
4 Requirements
4.1 General
Product properties shall be assessed in accordance with Clause 5. To be in conformance with this
document, products shall meet the requirements of 4.2 and 4.3, as appropriate.
The test methods for determination of each property are given in Table 5, which also shows the required
test specimen dimensions and the minimum number of test specimens required to give one test result.
One test result for a product property is the average of the measured values on the number of test
specimens given in Table 5.
4.2 For all applications
4.2.1 Linear dimensions
Length and width shall be measured in accordance with ISO 29465 for each of the four specimens.
A minimum of four measurements shall be made for each dimension. Each value shall be within the
tolerances specified in Table 1.
The thickness of aerogel insulation shall be measured in accordance with ISO 29466 by using a square
plate under pressure of not less than 250 Pa and shall be subject to the tolerances detailed in Table 1.
The pressure employed during measurement shall be disclosed.
Tighter tolerances can be necessary for certain applications; this shall be agreed to by the supplier and
purchaser.
Table 1 — Dimensional tolerances
Length Width Thickness
(%) (%) (%)
±5 ±5 T1 −0 / +3
T2 −0 / +5
T3 −0 / +10
T4 −0 / +15
T5 −0 / +20
If more restrictive tolerances are required, these shall be agreed between purchaser and supplier.
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ISO/FDIS 22482:2021(E)

4.2.2 Density
Densi
...