TS 6874 EN ISO 9251

TS 6874 EN ISO 9251 is a terminology standard for thermal insulation, focused on the terms and definitions used for heat transfer conditions and material properties. It helps ensure that the language used to discuss insulation performance is understood consistently, providing a common technical vocabulary for heat flow, material behavior, and related comparisons.

A common vocabulary for heat transfer and insulation materials

In thermal insulation practice, heat transfer is commonly discussed in terms of conduction, convection, and radiation, while material properties such as thermal conductivity, thermal resistance, density, porosity, and moisture-related behavior affect how insulation performs. In general technical use, clear terminology is essential because these concepts are not interchangeable. Vocabulary standards like this one reduce ambiguity in specifications, laboratory reports, design documents, and multilingual technical communication.

What this standard covers

Based on the supplied scope, this standard covers the definition of terms relating to heat transfer conditions and material properties used in thermal insulation. It is therefore a vocabulary document rather than a test method or a set of numerical performance limits. Such terminology standards support consistent usage across disciplines and languages, especially where insulation materials are specified, compared, or documented in international contexts.

• Definitions for core heat-transfer-related concepts
• Explanations of terms for insulation material properties
• Consistent technical language for documentation and communication
• Support for design, laboratory, and specification work