ISO 8497:1994 PDF

Name: ISO 8497:1994 — Thermal insulation — Determination of steady-state thermal transmission properties of thermal insulation for circular pipes
SKU: ISO 8497:1994
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Thermal insulation — Determination of steady-state thermal transmission properties of thermal insulation for circular pipes

Название (английский):

ISO 8497:1994

Thermal insulation — Determination of steady-state thermal transmission properties of thermal insulation for circular pipes

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 16
Дата публикации:: 31 марта 1994 г.
Издание:: ISO IS 8497 edition 1 version 1
ICS:: 27.220

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Описание (английский):

Specifies apparatus performance requirements, but does not specify apparatus design. Applies to circular pipes, generally operating at temperatures above ambient. The type of specimen, temperatures and test conditions to which the standard applies are specified in the standard in detail.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 8497:1994 describes a standardized method for determining the steady‑state thermal transmission properties of thermal insulation for circular pipes. The standard applies to pipe insulation generally operating at temperatures above ambient and specifies apparatus performance requirements (but does not prescribe apparatus design). It focuses on measurements that are representative of end‑use pipe geometry and radial heat flow, addressing cases where flat‑plate methods are not adequate.

Key topics and technical requirements

Scope and applicability: Applies to circular pipe insulation specimens (rigid, semi‑rigid, flexible blanket, or loose‑fill) and to conditions where representative pipe geometry and possible air gaps are important.

Apparatus performance: Defines performance requirements for pipe test apparatus; two main apparatus types are covered:

Guarded‑end apparatus (controls axial end losses)
Calibrated/calculated‑end apparatus (uses corrections for axial heat transfer)

Measured properties and definitions:

Linear thermal transference (K1) - linear heat flow per unit temperature difference (heat loss per unit pipe length)
Linear thermal resistance (R1) and linear conductance (A1)
Thermal conductivity (λ) and thermal resistivity (r) for homogeneous materials under steady state
Areal properties (areal conductance/resistance) with guidance on their arbitrary nature for pipe geometry

Specimen and test conditions: Specifies specimen uniformity, permitted features (joints, jackets, metallic elements), test section length, and typical ambient operation (still air, commonly 15–35 °C). Allows operation up to the specimen’s maximum service temperature.

Procedure, calculations and corrections: Includes procedures for mounting, steady‑state measurement, end‑cap corrections, calculations to derive K1, R1 and λ, and guidance on test precision and accuracy.

Reporting: Requires full disclosure of specimen geometry, test temperatures, apparatus type and any calculations or corrections used.

Practical applications and users

Useful for manufacturers, independent testing laboratories and engineering specifiers who need reliable, end‑use representative thermal performance data for pipe insulation.

Common uses:

Selecting insulation products for hot and chilled pipework
Calculating heat loss per meter of insulated pipe for energy audits and thermal design
Product development, QA/QC and compliance testing when cylindrical geometry or air gaps affect performance
Comparing pipe test results with flat‑plate data where appropriate

Target users: thermal insulation engineers, HVAC designers, process engineers, product testing labs, and standards/quality personnel.

Related standards

ISO 7345 (thermal insulation - physical quantities and definitions)

ISO 8301 (guarded hot‑plate apparatus)

ISO 8302 (heat flow meter apparatus) These referenced documents provide complementary definitions and flat‑specimen test methods; ISO 8497 clarifies when pipe‑specific testing is required.

ISO 8497:1994 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Practical applications and users

Related standards

Технические детали

SIST EN ISO 7345:2018

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

ISO 8301:1991/Amd 1:2010

Thermal insulation — Determination of steady-state thermal resistance and related properties — Heat flow mete…

SIST ISO 8302:1997

Thermal insulation -- Determination of steady-state thermal resistance and related properties -- Guarded hot…

SIST EN ISO 8497:1997

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