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ISO 21901:2021

Thermal insulation — Test method for thermal diffusivity — Periodic heat method ISO 21901:2021

Publication date:   Feb 25, 2021

General information

90.93   Standard confirmed   Jul 30, 2026

ISO

ISO/TC 163/SC 1 Test and measurement methods

International Standard

27.220   Heat recovery. Thermal insulation

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Published

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Scope

This document specifies a periodic heat method for measurement of the thermal diffusivity of thermal insulation material in the shape of a flat plate.

Life cycle

NOW

PUBLISHED
ISO 21901:2021
90.93 Standard confirmed
Jul 30, 2026

REVISED BY

IN_DEVELOPMENT
ISO/PWI 21901




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