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BS EN 16012:2012+A1:2015

BS EN 16012:2012+A1:2015

$167.15

Thermal insulation for buildings. Reflective insulation products. Determination of the declared thermal performance

Published By Publication Date Number of Pages
BSI 2015 36
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This European Standard describes a set of procedures for using existing standardized CEN or ISO test and calculation methods to determine the declared thermal performance of reflective insulation products. This European Standard supports and does not replace existing CEN or ISO test methods.

This European Standard applies to any thermal insulation product that derives a proportion of its claimed thermal properties from the presence of one or more reflective or low emissivity surfaces together with any associated airspace(s). It does not replace the existing procedures for the determination of the thermal performance of products already covered by an existing harmonized product standard where the declared value of these products does not specifically include any claims attributable to the emissivity of the facing.

PDF Catalog

PDF Pages PDF Title
4 Contents Page
6 Foreword
7 Introduction
8 1 Scope
2 Normative references
9 3 Terms, definitions, symbols and units
3.1 Terms and definitions
3.2 Symbols and units
10 4 Description of product types
4.1 Product classification
4.2 Product Type 1
11 Figure 1 — Example of insulation material with reflective facing on each side
4.3 Product Type 2
Figure 2 — Example of bubble foil insulation with reflective surfaces
4.4 Product Type 3
12 Figure 3 – Example of stitched multi-foil insulation
4.5 Product Type 4
Figure 4 – Example of multiple layers of product Type 4 under flooring
13 5 Methods of assessment
5.1 General
5.2 Thickness measurement
5.3 !Test specimens”
5.3.1 Size and number of specimens
5.3.2 Conditioning and specimen preparation”
5.4 Determination of thermal resistance – outline
14 5.5 Determination of core thermal resistance of Product Type 1
5.5.1 Product thickness greater than 20 mm
5.5.1.1 Thermal resistance expected to be greater than 0,5 m² K/W
5.5.1.2 Thermal resistance expected to be 0,5 m² K/W or less
5.5.2 Product thickness less than or equal to 20 mm
5.5.2.1 Thermal resistance expected to be greater than 0,5 m² K/W
5.5.2.2 Thermal resistance expected to be 0,5 m² K/W or less
15 5.5.3 For all thicknesses and nominal thermal resistances
5.6 Determination of core thermal resistance of Product Type 2
5.6.1 Product Type 2 with surface indentations less than 2 mm in depth
5.6.2 Product Type 2 with surface indentations greater than or equal to 2 mm, but less than 5 mm in depth
5.6.3 Product Type 2 with surface indentations 5 mm in depth or greater
5.6.4 For all thicknesses and/or nominal thermal resistances
5.7 Determination of core thermal resistance of Product Type 3 (METHOD C)
5.7.1 Principle
5.7.2 Determination of the need for specimen conditioning
16 5.7.3 Air cavity and specimen installation
17 Figure 5 — Typical test element used to measure the thermal resistance of an insulated air cavity
18 5.7.4 Hot box test conditions
5.7.5 Allowance for heat transfer around the specimen (Edge surround)
19 Figure 6 — Heat transfer around the specimen perimeter
20 Table 1 — Linear thermal transmittance for insulated cavity in a surround panel
5.7.6 Calculating the core thermal resistance of the product
5.8 Determination of the thermal performance of Product Type 4
21 5.9 Emissivity
5.9.1 General
5.9.2 Measurement of emissivity
5.9.2.1 Procedure
5.9.2.2 Size and number of specimens
5.9.2.3 Specimen preparation and conditioning
22 6 Uncertainty
6.1 General
6.2 Thickness measurements
6.3 Use of surface thermocouples on thin samples in a guarded hot plate or in heat flow meter measurement
6.4 Use of dummy insulation specimens
6.5 Derivation of the core resistance of a Type 3 Product from hot box measurements
23 7 Expression of results
7.1 Results derived from hot plate and emissivity measurements (Products Type 1 & 2)
7.2 Results derived from hot box and emissivity measurements (Product Types 1, 2 & 3)
7.3 Results derived from emissivity measurements only (product Type 4)
24 8 Report
25 Annex A (normative)
Figure A.1 – Decision making flow chart for identification of product types
26 Annex B (normative)
Figure B.1 – Selection of test methodology for product type 1 when using a hot plate method
27 Annex C (normative)
Figure C.1 – Selection of the measurement technique for product type 2
28 Annex D (normative) Measurement of emissivity using a Thermal Infra-Red apparatus
D.1 Principle of the hemispherical blackbody radiator0F )
Figure D.1 — Schematic diagram of typical thermal infra-red apparatus
D.2 Description of suitable hemispherical blackbody radiator and specimen holder
29 Figure D.2 — Arrangement of thermal infra-red apparatus and specimen
D.3 Calibration standards
30 D.4 Calculation of the emissivity
D.5 Sampling and preparation of the test specimens
D.5.1 Sampling
D.5.2 Dimensions and numbers of specimens
D.5.3 Conditioning of specimens for ageing
D.6 Procedure for measurement of specimens
31 D.7 Expression of results
32 Annex E (normative) “Dummy specimen” technique for the heat flow meter apparatus
E.1 Principle
E.2 Procedure
Figure E.1 — Schematic diagram of dummy specimen arrangement
33 Figure E.2 — Schematic diagram of dummy specimen arrangement with specimen under test
E.3 Specimens of low thermal resistance
E.4 Calibration
34 Bibliography

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BS EN 16012:2012+A1:2015
$167.15