UNI EN ISO 12241 : 2009
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
THERMAL INSULATION FOR BUILDING EQUIPMENT AND INDUSTRIAL INSTALLATIONS - CALCULATION RULES
27-09-2022
22-01-2009
Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions and symbols
3.1 Terms and definitions
3.2 Definition of symbols
3.3 Subscripts
4 Calculation methods for heat transfer
4.1 Fundamental equations for heat transfer
4.2 Surface temperature
4.3 Prevention of surface condensation
4.4 Determination of total heat flow rate for
plane walls, pipes and spheres
5 Calculation of the temperature change in pipes,
vessels and containers
5.1 Longitudinal temperature change in a pipe
5.2 Temperature change and cooling times in pipes,
vessels and containers
6 Calculation of cooling and freezing times of stationary
liquids
6.1 Calculation of the cooling time for a given
thickness of insulation to prevent the freezing
of water in a pipe
6.2 Calculation of the freezing time of water in a pipe
7 Determination of the influence of thermal bridges
7.1 General
7.2 Calculation of correction terms for plane surfaces
7.3 Calculation of correction terms for pipes
8 Underground pipelines
8.1 General
8.2 Calculation of heat loss (single line) without
channels
8.3 Other cases
Annex A (normative) - Thermal bridges in pipe insulation
Annex B (informative) - Projecting thermal bridges of
roughly constant cross-section
Annex C (informative) - Examples
Bibliography
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