Thermal insulating products for building equipment and industrial installations - Determination of maximum service temperature

This European Standard specifies the equipment and procedures for determining the maximum service temperature of flat insulation products. It is applicable to thermal insulating products.

Wärmedämmstoffe für die Haustechnik und für betriebstechnische Anlagen - Bestimmung der oberen Anwendungsgrenztemperatur

Diese Europäische Norm legt Prüfeinrichtungen und Verfahren zur Bestimmung der oberen Anwendungs-grenztemperatur von ebenen Dämmprodukten fest. Sie gilt für Wärmedämmprodukte.

Produits isolants thermiques pour l'équipement du bâtiment et les installations industrielles - Détermination de la température maximale de service

La présente Norme européenne spécifie l'équipement et les modes opératoires servant à déterminer la température maximale de service des produits isolants plats. Elle s’applique aux produits isolants thermiques.

Toplotnoizolacijski proizvodi za opremo stavb in industrijske inštalacije - Ugotavljanje najvišje temperature servisiranja

Ta evropski standard določa opremo in postopke za ugotavljanje najvišje temperature servisiranja ploščatih izolacijskih proizvodov. Uporablja se za toplotnoizolacijske proizvode.

General Information

Status
Withdrawn
Public Enquiry End Date
30-May-2012
Publication Date
16-Jan-2013
Withdrawal Date
25-Sep-2022
Technical Committee
Current Stage
9900 - Withdrawal (Adopted Project)
Start Date
26-Sep-2022
Due Date
19-Oct-2022
Completion Date
26-Sep-2022

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Toplotnoizolacijski proizvodi za opremo stavb in industrijske inštalacije - Ugotavljanje najvišje temperature servisiranjaWärmedämmstoffe für die Haustechnik und für betriebstechnische Anlagen - Bestimmung der oberen AnwendungsgrenztemperaturProduits isolants thermiques pour l'équipement du bâtiment et les installations industrielles - Détermination de la température maximale de serviceThermal insulating products for building equipment and industrial installations - Determination of maximum service temperature91.100.60Thermal and sound insulating materialsICS:Ta slovenski standard je istoveten z:EN 14706:2012SIST EN 14706:2013en,fr,de01-marec-2013SIST EN 14706:2013SLOVENSKI
STANDARDSIST EN 14706:20061DGRPHãþD



SIST EN 14706:2013



EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 14706
October 2012 ICS 91.100.60 Supersedes EN 14706:2005English Version
Thermal insulating products for building equipment and industrial installations - Determination of maximum service temperature
Produits isolants thermiques pour l'équipement du bâtiment et les installations industrielles - Détermination de la température maximale de service
Wärmedämmstoffe für die Haustechnik und für betriebstechnische Anlagen - Bestimmung der oberen Anwendungsgrenztemperatur This European Standard was approved by CEN on 24 August 2012.
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14706:2012: ESIST EN 14706:2013



EN 14706:2012 (E) 2 Contents Page Foreword .41 Scope .52 Normative references .53 Terms and definitions .54 Principle .55 Apparatus .66 Test specimens .76.1 Dimensions of test specimens .76.2 Number of test specimens .76.3 Conditioning of test specimens .87 Procedure .87.1 Test conditions .87.2 Test procedure .88 Calculation and expression of results .98.1 Thickness deformation versus time .98.2 Dimensional changes .98.3 Additional tests and/or observations . 108.4 Internal self heating . 109 Accuracy of measurement . 1110 Test report . 12Annex A (normative)
Modifications of and additions to the general test method for mineral wool products . 13A.1 General . 13A.2 Test specimens . 13A.2.1 Conditioning of test specimens . 13A.2.2 Dimensions of test specimens . 13A.3 Procedure . 13A.3.1 Test conditions . 13A.3.2 Test procedure . 13A.4 Additional tests and/or observations . 14A.5 Test for internal self-heating . 14Annex B (normative)
Modifications of and additions to the general test method for cellular glass products . 16B.1 General . 16B.2 Apparatus . 16B.3 Test specimens . 16B.3.1 Conditioning of test specimens . 16B.3.2 Dimensions of test specimens . 16B.4 Test procedure . 16B.5 Additional tests and/or observations . 16B.5.1 Observations . 16B.5.2 Additional tests . 16Annex C (normative)
Modifications of and additions to the general test method for phenolic foam products . 17C.1 General . 17C.2 Test specimens . 17C.2.1 Dimensions of test specimens . 17SIST EN 14706:2013



EN 14706:2012 (E) 3 C.2.2 Conditioning of test specimens . 17C.3 Test procedure . 17C.4 Additional tests and/or observations . 17Annex D (normative)
Modifications of and additions to the general test method for polyethylene foam (PEF) and flexible elastomeric foam (FEF) products . 19D.1 General . 19D.2 Apparatus . 19D.3 Dimensions of the test specimens . 19D.4 Test procedure . 19D.5 Calculation and expression of results . 20Bibliography . 21 SIST EN 14706:2013



EN 14706:2012 (E) 4 Foreword This document (EN 14706:2012) has been prepared 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 April 2013, and conflicting national standards shall be withdrawn at the latest by April 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 14706:2005. The main technical changes that have been made in this new edition of EN 14706 are the following: a) Normative references have been updated; b) Figure 1 has been corrected; c) Clause 9, Accuracy of measurements has been revised; d) 5.1, Flat square or circular hot plate has been supplemented; e) 6.1, Dimensions of test specimens has been revised; f) A.3.1, Test conditions has been revised; g) A.5, Test for internal self-heating has been completed; h) C.4, Additional tests and/or observations has been completed; i) D.3, Dimensions of test specimens has been revised. This European Standard is one of a series of standards which specify test methods for determining dimensions and properties of thermal insulating materials and products. It 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 administrative provisions of the Member States relating to construction products (Directive 89/106/EEC) through the consideration of the essential requirements. This European 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. A similar standard is available for testing of preformed pipe insulation EN 14707, Thermal insulating products for building equipment and industrial installations — Determination of maximum service temperature for preformed pipe insulation. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 14706:2013



EN 14706:2012 (E) 5 1 Scope This European Standard specifies the equipment and procedures for determining the maximum service temperature of flat insulation products. It is applicable to thermal insulating products. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 823, Thermal insulating products for building applications — Determination of thickness EN 12085, Thermal insulating products for building applications — Determination of linear dimensions of test specimens EN 12429, Thermal insulating products for building applications — Conditioning to moisture equilibrium under specified temperature and humidity conditions EN 14303, Thermal insulation products for building equipment and industrial installations  Factory made mineral wool (MW) products - Specification ISO 5725-2:1994, Accuracy (trueness and precision) of measurement methods and results — Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method ISO 7884-1, Glass — Viscosity and viscometric fixed points — Part 1: Principles for determining viscosity and viscometric fixed points ISO 7884-7, Glass — Viscosity and viscometric fixed points — Part 7: Determination of annealing point and strain point by beam bending 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 maximum service temperature highest temperature at which the insulation product, when installed at the recommended thickness in a given application, continues to function within specified limits of performance [SOURCE: EN ISO 9229:2007, 2.6.9.1] Note 1 to entry: The required performance may be in the areas of dimensional stability, thermal properties, and mechanical properties as well as changes in appearance and resistance against creation of hazards such as internal self heating (see Annexes A and C and possible requirements in the relevant product standard). Note 2 to entry: In the present test procedure, which is used as a reference, the test specimen is exposed to a temperature difference going from ambient to the maximum service temperature. This may not reflect the actual application conditions when products are exposed to different temperatures on the two main faces, e.g. in multilayer systems or for faced products where the facing may limit the maximum service temperature. 4 Principle Measure thickness, length, and width after one sided heat treatment for a specified time period, at the maximum service temperature, achieved using a specified rate of temperature increase. The thickness of the test specimen is measured during heat treatment, and the length and width only after cooling to ambient temperature. The procedure may be an iterative process. SIST EN 14706:2013



EN 14706:2012 (E) 6 Additional requirements for assessing the maximum service temperature of specific materials are described in normative annexes to this European Standard or the relevant product standard or any other European Technical Specification. 5 Apparatus A general arrangement of the apparatus is indicated in Figure 1 and comprises: 5.1 Flat square or circular hot plate, with a uniform temperature distribution in the measuring zone on the hot face and a heat flux perpendicular to the face of the hot plate. The deviation from flatness of the hot plate shall not exceed 1 mm in the measuring zone at ambient temperature. The hot plate shall be capable of being controlled to within ± 2 % of a predetermined temperature or ± 10 °C, whichever is smaller. The hot plate shall be capable of being heated at 50 °C/h and/or 300 °C/h. If a small size equipment (e.g. Ø 100 mm) is used, the free movement of the test specimen during the test is critical and shall be controlled strictly. 5.2 Edge insulation, with a gap as small as possible (e.g. ≤ 1 mm/100 mm test specimen size) which will permit free movement during the test of the test specimen and of the pressure plate. 5.3 Square or circular pressure plate, with the same dimensions as the test specimen exerting the required load on the test specimen. 5.4 Device, e.g. electromechanical, for measuring the thickness of the test specimen during the test to the nearest 0,1 mm. When determining the thickness of the test specimen, the thermal movement of the apparatus (e.g. quartz rod) shall be taken into account up to the maximum service temperature. 5.5 Temperature sensors (e.g. thermocouples) capable of recording the hot plate temperature to the nearest ± 1 % in centigrade but not less than ± 1 °C, which are placed within grooves on the hot plate. SIST EN 14706:2013



EN 14706:2012 (E) 7 Dimensions in millimetres
Key 1 device for measuring thickness, e.g. electromechanical device 2 test specimen 3 pressure plate 4 edge insulation
5 hot plate 6 thermocouple 7 small gap Figure 1 — Example of an apparatus for determining maximum service temperature 6 Test specimens 6.1 Dimensions of test specimens a) Length and width: Test specimens shall be cut as squares or cylinders (as appropriate) and the cross section dimensions shall be as follows: 1) 100 mm × 100 mm (or diameter 100 mm) or 2) 150 mm × 150 mm (or diameter 150 mm) or 3) 200 mm × 200 mm (or diameter 200 mm) or 4) 300 mm × 300 mm (or diameter 300 mm). The length and width or diameter shall be as specified in the relevant product standard or in annexes to this European Standard. b) Thickness: The test specimen thickness shall be (100 ± 5) mm prepared by slicing if needed. In the absence of a product standard or any other European Technical Specification the dimensions may be agreed between parties. Testing may be performed on multilayer systems to simulate the conditions existing in the application. 6.
...

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Toplotnoizolacijski proizvodi za opremo stavb in industrijske inštalacije - Ugotavljanje najvišje temperature servisiranjaWärmedämmstoffe für die Haustechnik und für betriebstechnische Anlagen - Bestimmung der oberen AnwendungsgrenztemperaturProduits isolants thermiques pour l'équipement du bâtiment et les installations industrielles - Détermination de la température maximale de serviceThermal insulating products for building equipment and industrial installations - Determination of maximum service temperature91.100.60Thermal and sound insulating materialsICS:Ta slovenski standard je istoveten z:FprEN 14706kSIST FprEN 14706:2012en,fr,de01-april-2012kSIST FprEN 14706:2012SLOVENSKI
STANDARD



kSIST FprEN 14706:2012



EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
FINAL DRAFT
FprEN 14706
February 2012 ICS 91.100.60 Will supersede EN 14706:2005English Version
Thermal insulating products for building equipment and industrial installations - Determination of maximum service temperature
Produits isolants thermiques pour l'équipement du bâtiment et les installations industrielles - Détermination de la température maximale de service
Wärmedämmstoffe für die Haustechnik und für betriebstechnische Anlagen - Bestimmung der oberen Anwendungsgrenztemperatur This draft European Standard is submitted to CEN members for unique acceptance procedure. It has been drawn up by the Technical Committee CEN/TC 88.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
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.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. FprEN 14706:2012: EkSIST FprEN 14706:2012



FprEN 14706:2012 (E) 2 Contents Page Foreword .41 Scope .52 Normative references .53 Terms and definitions .54 Principle .55 Apparatus .66 Test specimens .76.1 Dimensions of test specimens .76.2 Number of test specimens .76.3 Conditioning of test specimens .87 Procedure .87.1 Test conditions .87.2 Test procedure .88 Calculation and expression of results .88.1 Thickness deformation versus time .88.2 Dimensional changes .98.3 Additional tests and/or observations .98.4 Internal self heating . 109 Accuracy of measurement . 1110 Test report . 12Annex A (normative)
Modifications of and additions to the general test method for mineral wool products . 13A.1 Introduction . 13A.2 Test specimens . 13A.2.1 Conditioning of test specimens . 13A.2.2 Dimensions of test specimens . 13A.3 Procedure . 13A.3.1 Test conditions . 13A.3.2 Test procedure . 13A.4 Additional tests and/or observations . 14A.5 Test for internal self-heating . 14Annex B (normative)
Modifications of and additions to the general test method for cellular glass products . 16B.1 Introduction . 16B.2 Apparatus . 16B.3 Test specimens . 16B.3.1 Conditioning of test specimens . 16B.3.2 Dimensions of test specimens . 16B.4 Test procedure . 16B.5 Additional tests and/or observations . 16B.5.1 Observations . 16B.5.2 Additional tests . 16Annex C (normative)
Modifications of and additions to the general test method for phenolic foam products . 17C.1 Introduction . 17C.2 Test specimens . 17C.2.1 Dimensions of test specimens . 17kSIST FprEN 14706:2012



FprEN 14706:2012 (E) 3 C.2.2 Conditioning of test specimens . 17C.3 Test procedure . 17C.4 Additional tests and/or observations . 17Annex D (normative)
Modifications of and additions to the general test method for polyethylene foam (PEF) and flexible elastomeric foam (FEF) products . 19D.1 Introduction . 19D.2 Apparatus . 19D.3 Dimensions of the test specimens . 19D.4 Test procedure . 19D.5 Calculation and expression of results . 20Bibliography . 21 kSIST FprEN 14706:2012



FprEN 14706:2012 (E) 4 Foreword This document (FprEN 14706:2012) has been prepared by Technical Committee CEN/TC 88 “Thermal insulating materials and products”, the secretariat of which is held by DIN. This document is currently submitted to the Unique Acceptance Procedure. This document will supersede EN 14706:2005. The main technical changes that have been made in this new edition of EN 14706 are the following ones: a) Normative references have been updated; b) Figure 1 has been corrected; c) Clause 9, Accuracy of measurements has been revised; d) 5.1, Flat square or circular hot plate has been supplemented; e) 6.1 Dimensions of test specimens has been revised; f) A.3.1, Test conditions has been revised; g) A.5, Test for internal self-heating has been completed; h) C.4, Additional tests and/or observations has been completed; i) D.3, Dimensions of test specimens has been revised. This European Standard is one of a series of standards which specify test methods for determining dimensions and properties of thermal insulating materials and products. It 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 administrative provisions of the Member States relating to construction products (Directive 89/106/EEC) through the consideration of the essential requirements. This standard contains the following 4 normative annexes:  Annex A — Modifications of and additions to the general test method for mineral wool products;  Annex B — Modifications of and additions to the general test method for cellular glass products;  Annex C — Modifications of and additions to the general test method for phenolic foam products;  Annex D — Modifications of and additions to the general test method for polyethylene foam (PEF) and flexible elastomeric foam (FEF) products. This European 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. A similar standard is available for testing of preformed pipe insulation EN 14707, Thermal insulating products for building equipment and industrial installations — Determination of maximum service temperature for preformed pipe insulation. kSIST FprEN 14706:2012



FprEN 14706:2012 (E) 5 1 Scope This European Standard specifies the equipment and procedures for determining the maximum service temperature of flat insulation products. It is applicable to thermal insulating products. 2 Normative references The following referenced documents are indispensable for the application 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. EN 823, Thermal insulating products for building applications — Determination of thickness EN 12085, Thermal insulating products for building applications — Determination of linear dimensions of test specimens EN 12429, Thermal insulating products for building applications — Conditioning to moisture equilibrium under specified temperature and humidity conditions ISO 5725-2:1995, Accuracy (trueness and precision) of measurement methods and results — Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method ISO 7884-1, Glass — Viscosity and viscometric fixed points — Part 1: Principles for determining viscosity and viscometric fixed points ISO 7884-7, Glass — Viscosity and viscometric fixed points — Part 7: Determination of annealing point and strain by beam bending 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 maximum service temperature highest temperature to which a thermal insulation product may be exposed at a given thickness and at which it will continue to function within specified limits of performance [EN ISO 9229:2007] NOTE 1 The required performance may be in the areas of dimensional stability, thermal properties, and mechanical properties as well as changes in appearance and resistance against creation of hazards such as internal self heating (see Annexes A and C and possible requirements in the relevant product standard). NOTE 2 In the present test procedure, which is used as a reference, the test specimen is exposed to a temperature difference going from ambient to the maximum service temperature. This may not reflect the actual application conditions when products are exposed to different temperatures on the two main faces, e.g. in multilayer systems or for faced products where the facing may limit the maximum service temperature. 4 Principle Measure thickness, length, and width after one sided heat treatment for a specified time period, at the maximum service temperature, achieved using a specified rate of temperature increase. The thickness of the test specimen is measured during heat treatment, and the length and width only after cooling to ambient temperature. NOTE The procedure may be an iterative process. kSIST FprEN 14706:2012



FprEN 14706:2012 (E) 6 Additional requirements for assessing the maximum service temperature of specific materials are described in normative annexes to this European Standard or the relevant product standard or any other European Technical Specification. 5 Apparatus A general arrangement of the apparatus is indicated in Figure 1 and comprises: 5.1 Flat square or circular hot plate, with a uniform temperature distribution in the measuring zone on the hot face and a heat flux perpendicular to the face of the hot plate. The deviation from flatness of the hot plate shall not exceed 1 mm in the measuring zone at ambient temperature. The hot plate shall be capable of being controlled to within ± 2 % of a predetermined temperature or ± 10 °C whichever is smaller. The hot plate shall be capable of being heated at 50 °C/h and/or 300 °C/h. If a small size equipment (e.g. Ø 100 mm) is used the free movement of the test specimen during the test is critical and shall be controlled strictly. 5.2 Edge insulation, with a gap as small as possible (e.g. ≤ 1 mm/100 mm test specimen size) which will permit free movement during the test of the test specimen and of the pressure plate. 5.3 Square or circular pressure plate, with the same dimensions as the test specimen exerting the required load on the test specimen. 5.4 Device, e.g. electromechanical for measuring the thickness of the test specimen during the test to the nearest 0,1 mm. When determining the thickness of the test specimen the thermal movement of the apparatus (e.g. quartz rod) shall be taken into account up to the maximum service temperature. 5.5 Temperature sensors (e.g. thermocouples) capable of recording the hot plate temperature to the nearest ± 1 % in centigrade but not less than ± 1 °C, which are placed within grooves on the hot plate. kSIST FprEN 14706:2012



FprEN 14706:2012 (E) 7
Key 1 Device for measuring thickness, e.g. electromechanical device 2 Test specimen 3 Pressure plate 4 Edge insulation
5 Hot plate 6 Thermocouple 7 Small gap Figure 1 — Example of an apparatus for determining maximum service temperature 6 Test specimens 6.1 Dimensions of test specimens a) Length and width: Test specimens shall be cut as squares or cylinders (as appropriate) and the cross section dimensions shall be as follows: 1) 100 mm × 100 mm (or diameter 100 mm) or 2) 150 mm × 150 mm (or diameter 150 mm) or 3) 200 mm × 200 mm (or diameter 200 mm) or 4) 300 mm × 300 mm (or diameter 300 mm). The length and width or diameter shall be as specified in the relevant product standard or in annexes to this European Standard. b) Thickness: The test specimen thickness shall be (100 ± 5) mm prepared by slicing if needed. NOTE 1 In the absence of a product standard or any other European Technical Specification the dimensions may be agreed between parties. NOTE 2 Testing may be performed on multilayer systems to simulate the conditions existing in the application. 6.2 Number of test specimens The number of test specimens shall be as specified in the relevant product standard. If the number is not specified, then at least three test specimens shall be used. NOTE In the absence of a product standard or any other European Tec
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