ONORM EN ISO 12241 : 2008
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.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
17-12-2022
12-01-2013
1 Scope
2 Normative references
3 Definitions, symbols and abbreviations
3.1 Physical quantities, symbols and units
3.2 Subscripts
4 Calculation methods for heat transfer
4.1 Fundamental equations for heat transfer
4.2 Surface temperature
4.3 Prevention of surface condensation
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
7 Thermal bridges
8 Underground pipelines
8.1 Calculation of heat loss (single line)
9 Tables and Diagrams
Annex A (informative) Comments on thermal conductivity
Annex B (informative) Examples
B.1 Calculation of the necessary insulation thicknesses
for a double layered wall of a firebox
B.2 Heat flow rate and surface temperature of an
insulated pipe
B.3 Temperature drop in a pipe
B.4 Temperature drop in a container
B.5 Cooling and freezing times in a pipe
B.6 Underground pipeline
B.7 Required insulation thickness to prevent surface
condensation
Annex C (informative) Bibliography
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