ISO 23993:2008 PDF

Name: ISO 23993:2008 — Thermal insulation products for building equipment and industrial installations — Determination of design thermal conductivity
SKU: ISO 23993:2008
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Thermal insulation products for building equipment and industrial installations — Determination of design thermal conductivity

Название (английский):

ISO 23993:2008

Thermal insulation products for building equipment and industrial installations — Determination of design thermal conductivity

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 31
Дата публикации:: 24 января 2008 г.
Издание:: ISO IS 23993 edition 1 version 1
ICS:: 27.220

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Описание (английский):

ISO 23993:2008 gives methods to calculate design thermal conductivities from declared thermal conductivities for the calculation of the thermal performance of building equipment and industrial installations. These methods are valid for operating temperatures from -200 °C to +800 °C. The conversion factors, established for the different influences, are valid for the temperature ranges indicated in the relevant clauses or annexes.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview - ISO 23993:2008 (Thermal insulation design thermal conductivity)

ISO 23993:2008 provides methods to derive design thermal conductivity values from declared thermal conductivities for thermal insulation used in building equipment and industrial installations. The standard covers operating conditions from −200 °C to +800 °C and defines a system of conversion factors to account for real-world influences on insulation performance. Where applicable, an additional term is included to represent regular insulation-related thermal bridges (for example, spacers).

Key topics and technical requirements

Declared vs. design thermal conductivity

Declared thermal conductivity is the laboratory value determined under reference conditions (see ISO 13787).
Design thermal conductivity is the value used in performance calculations adjusted to service conditions.

Conversion-factor approach

Design values are obtained by applying multiplicative conversion factors to declared values and adding a term for regular thermal bridges (Δλ).
Conversion factors cover identified influences; they can be taken from Annex A or derived from measured data (e.g., EN 12667, ISO 8497).

Principal influences accounted for

Temperature non-linearity / temperature difference
Moisture content
Ageing
Compression (mechanical load)
Convection within the material
Thickness effects
Regular joints and insulation-related thermal bridges (spacers)

Annexes and guidance

Annex A: normative conversion factors
Annex B: worked examples
Annex C: approximate values and guidance for practical use

Normative references

ISO 13787, ISO 7345, ISO 8497, ISO 9229, ISO 9053 and related documents for definitions and test procedures.

Applications and who uses ISO 23993

Thermal engineers and energy modelers use the standard to convert laboratory thermal conductivity data into accurate design inputs for heat-loss, process insulation, and energy-efficiency calculations.

Insulation manufacturers and product certifiers apply it to declare performance and derive conservative design values for datasheets.

Plant designers, HVAC and piping engineers employ design λ values to size insulation systems for building services and industrial installations.

Testing laboratories and consultants use the conversion methodology when test conditions differ from in-service conditions.

Related standards

ISO 13787 - Determination of declared thermal conductivity

ISO 7345 - Thermal insulation: physical quantities and definitions

ISO 8497 - Thermal transmission properties for circular pipes

ISO 9229 - Thermal insulation vocabulary

ISO 9053 - Airflow resistance test methods

ISO 23993:2008 enables consistent, traceable, and conservative conversion of lab thermal conductivity data into practical design values for a wide range of temperatures and service conditions, supporting reliable thermal-performance and energy-efficiency assessments.

ISO 23993:2008 PDF

Abstract

Похожие стандарты

Overview - ISO 23993:2008 (Thermal insulation design thermal conductivity)

Key topics and technical requirements

Applications and who uses ISO 23993

Related standards

Технические детали

SIST EN ISO 13787:2003

Thermal insulation products for building equipment and industrial installations - Determination of declared t…

SIST EN ISO 8497:1997

Thermal insulation - Determination of steady-state thermal transmission properties of thermal insulation for…

SIST EN ISO 7345:2018

Thermal performance of buildings and building components - Physical quantities and definitions (ISO 7345:2018)

SIST EN ISO 9229:2020

Thermal insulation - Vocabulary (ISO 9229:2020)

SIST EN ISO 9053-2:2020

Acoustics - Determination of airflow resistance - Part 2: Alternating airflow method (ISO 9053-2:2020)

SIST EN ISO 23993:2011

Thermal insulation products for building equipment and industrial installations - Determination of design the…