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BS EN ISO 12629:2022

BS EN ISO 12629:2022

$102.76

Thermal insulating products for building equipment and industrial installations. Determination of water vapour transmission properties of preformed pipe insulation

Published By Publication Date Number of Pages
BSI 2022 20
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This document specifies the equipment and procedure for determining the water vapour transmission properties in the steady state under specified test conditions for test specimens of preformed pipe insulation. It is applicable to thermal insulating products. It is intended to be used for homogeneous materials (see NOTE below) and for products which can have integral skins or adhered facings of some different material. NOTE      A material is considered to be homogeneous in terms of mass distribution if its density is approximately the same throughout, i.e. if the measured density values are close to its mean density.

PDF Catalog

PDF Pages PDF Title
2 National foreword
4 European foreword
6 Foreword
7 1 Scope
2 Normative references
3 Terms, definitions, symbols, units and subscripts
3.1 Terms and definitions
8 3.2 Symbols and units
9 3.3 Subscripts
4 Principle
5 Apparatus
10 6 Test specimens
6.1 General
6.2 Dimensions of the test specimen
6.3 Number of test specimens
6.4 Conditioning of test specimens
11 7 Procedure
7.1 Test conditions
12 7.2 Preparation of specimen and test assembly
7.3 Test procedure
13 8 Calculation and expression of results
8.1 Water vapour flow rate
8.2 Density of water vapour flow rate
14 8.3 Water vapour permeance
8.4 Water vapour resistance
8.5 Water vapour permeability
15 8.6 Water vapour diffusion resistance factor
8.6.1 General
8.6.2 Calculation of δa
16 8.6.3 Calculation of δ
17 8.6.4 Calculation of μ
9 Accuracy of measurement
10 Test report
19 Bibliography

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BS EN ISO 12629:2022
$102.76