ISO 6334:2023

INTERNATIONAL ISO
STANDARD 6334
First edition
2023-12
Thermal insulation products for
building equipment and industrial
installations — Expanded perlite
products — Specification
Isolation thermique pour les équipements de bâtiments et les
installations industrielles — Produits de perlite expansée —
Spécifications
Reference number
© ISO 2023
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Published in Switzerland
ii
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, symbols, units and abbreviated terms . 3
3.1 Terms and definitions . 3
3.2 Symbols, units and abbreviated terms . 3
3.2.1 Symbols and units . 3
3.2.2 Abbreviated terms for declared properties . 4
3.2.3 Abbreviated terms . 4
4 Requirements . 4
4.1 General . 4
4.2 For all applications . 4
4.2.1 Thermal conductivity . 4
4.2.2 Dimensions and tolerances . 5
4.2.3 Dimensional stability . 5
4.2.4 Fire properties . 5
4.2.5 Durability characteristics . 5
4.3 For specific applications . 6
4.3.1 General . 6
4.3.2 Maximum service temperature (ST) . 6
4.3.3 Compressive stress or strength . 6
4.3.4 Trace quantities of water-soluble ions and the pH-value . 7
4.3.5 Water vapour diffusion resistance . 7
4.3.6 Short-term water absorption by partial immersion . 7
5 Test methods . 7
5.1 Sampling . 7
5.2 Conditioning. 7
5.3 Testing . 8
5.3.1 General . 8
5.3.2 Thermal conductivity . 9
5.3.3 Maximum service temperature (ST) . 9
5.3.4 Fire properties . 9
6 Designation code . .10
7 Evaluation of conformity . .10
8 Marking and labelling .11
Annex A (normative) Factory production control .12
Annex B (informative) Additional properties .13
Annex C (informative) Preparation of the test specimens to measure thermal conductivity .15
Bibliography .16
iii
Foreword
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electrotechnical standardization.
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described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
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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
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iv
INTERNATIONAL STANDARD ISO 6334:2023(E)
Thermal insulation products for building equipment and
industrial installations — Expanded perlite products —
Specification
1 Scope
This document specifies the requirements for factory-made expanded perlite products which are used
for thermal insulation of industrial installations and building equipment with an operating temperature
from 23 °C to ~ 1 000 °C.
The products are manufactured in the form of boards, pipe sections, segments, prefabricated ware and
special ware.
This document describes product characteristics and includes procedures for testing, evaluation of
conformity, marking and labelling.
Products covered by this document are also used in prefabricated thermal insulation systems and
composite panels; the structural performance of systems incorporating these products is not covered.
This document does not specify the required level or class of a given property required to be achieved
by a product in order to demonstrate fitness for purpose in a particular application. The levels required
for a given application can be found in regulations and invitations to tender.
This document is not applicable to:
a) products with a declared thermal conductivity greater than 0 072 W/(m⋅K) at 70 °C;
b) products intended to be used for the insulation of the building structure;
c) the acoustical aspects
1) direct airborne sound insulation, and
2) impact noise transmission index.
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 1182, Reaction to fire tests for products — Non-combustibility test
ISO 1716, Reaction to fire tests for products — Determination of the heat of combustion (calorific value)
ISO 2477, Shaped insulating refractory products — Determination of permanent change in dimensions on
heating
ISO 8302, Thermal insulation — Determination of steady-state thermal resistance and related properties
— Guarded hot plate apparatus
ISO 8497, Thermal insulation — Determination of steady-state thermal transmission properties of thermal
insulation for circular pipes
ISO 8894-1, Refractory materials — Determination of thermal conductivity — Part 1: Hot-wire methods
(cross-array and resistance thermometer)
ISO 9053, Acoustics — Determination of airflow resistance
ISO 9229, Thermal insulation — Vocabulary
ISO 11654, Acoustics — Sound absorbers for use in buildings — Rating of sound absorption
ISO 12570, Hygrothermal performance of building materials and products — Determination of moisture
content by drying at elevated temperature
ISO 12576-1, Thermal insulation — Insulating materials and products for buildings — Conformity control
systems — Part 1: Factory-made products
ISO 13787, Thermal insulation products for building equipment and industrial installations —
Determination of declared thermal conductivity
ISO 21129, Hygrothermal performance of building materials and products — Determination of water-
vapour transmission properties — Box method
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 29467, Thermal insulating products for building applications — Determination of squareness
ISO 29468, Thermal insulating products for building applications — Determination of flatness
ISO 29469:2022, Thermal insulating products for building applications — Determination of compression
behaviour
ISO 29470, Thermal insulating products for building applications — Determination of the apparent density
ISO 29472, Thermal insulating products for building applications — Determination of dimensional stability
under specified temperature and humidity conditions
ISO 29767, Thermal insulating products for building applications — Determination of short-term water
absorption by partial immersion
ISO 5017, Dense shaped refractory products — Determination of bulk density, apparent porosity and true
porosity
ISO 8841, Dense, shaped refractory products — Determination of permeability to gases
ISO 20392, Thermal-insulating materials — Determination of compressive creep
ISO 16537, Thermal insulating products for building applications — Determination of shear behaviour
ISO 12628, Thermal insulating products for building equipment and industrial installations —
Determination of dimensions, squareness and linearity of preformed pipe insulation
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 12629, Thermal insulating products for building equipment and industrial installations —
Determination of water vapour transmission properties of preformed pipe insulation
ISO 18099, Thermal insulating products for building equipment and industrial installations —
Determination of the coefficient of thermal expansion
ISO 12623, Thermal insulating products for building equipment and industrial installations —
Determination of short-term water absorption by partial immersion of preformed pipe insulation
3 Terms, definitions, symbols, units and abbreviated terms
3.1 Terms and definitions
For the purposes of this document the terms and definitions given in ISO 9229 and the following apply.
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/
3.1.1
production line
equipment that produces products in a continuous process
Note 1 to entry: For initial type test (ITT) and factory production control (FPC), each line is considered separately.
3.1.2
production unit
equipment that produces products in a discontinuous process
Note 1 to entry: For initial type test (ITT) and factory production control (FPC), units using the same process in
one factory are considered together (as one production line).
3.2 Symbols, units and abbreviated terms
3.2.1 Symbols and units
Symbol Quantity Unit
d inside diameter of pipe section mm
b width mm
t thickness mm
t declared thickness of the product mm
D
S deviation from linearity mm
lin
l length mm
S deviation from squareness of boards on length and width mm/m
b
S deviation from squareness of boards on thickness mm
t
S deviation from squareness for pipe insulation mm
p
S deviation from flatness mm
max
Δε relative change in length %
l
Δε relative change in width %
b
Δε relative change in thickness %
t
λ thermal conductivity W/(m·K)
λ declared thermal conductivity W/(m·K)
D
μ water vapour diffusion resistance factor —
σ bending strength kPa
m
ρ apparent density kg/m
a
3.2.2 Abbreviated terms for declared properties
Abbreviated term Declared property
CS(5/Y) declared level for compressive stress at 5 % deformation
Cl declared level for chloride content
F declared level for fluoride content
Na declared level for sodium
K declared level for potassium content
pH declared level for pH
L declared class for length tolerances
MU declared value for water vapour diffusion resistance factor
P declared value for flatness tolerances
S declared class for squareness tolerances
ST declared level for maximum service temperature
T declared class for thickness tolerances
W declared class for width tolerances
3.2.3 Abbreviated terms
Abbreviated term Full term
EP Expanded perlite
ITT Initial type test
ML Manufacturer's literature
FPC Factory production control
ST Service temperature
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 the requirements of 4.3, as appropriate.
The test methods to be used for determination of each property are given in Table 4, 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 4.
For FPC, see Annex A.
4.2 For all applications
4.2.1 Thermal conductivity
The thermal conductivity values shall be declared by the manufacturer at reference mean temperatures
covering the product ST range. The following conditions apply:
— the measured values shall be expressed with three significant figures;
— the declared conductivity curve shall be given as a limit curve, as defined in ISO 13787.
4.2.2 Dimensions and tolerances
4.2.2.1 Linear dimensions
The length, l, width, b, and thickness, t, of boards and the dimensions of pipe sections and prefabricated
ware shall be declared. When determined, no test result shall deviate from the declared values by more
than the tolerance given in Table 1.
Table 1 — Dimensional tolerances
Form of delivery Length Width Thickness Inside
...