ISO 24285:2022

Overview

ISO 24285:2022 - Thermal insulation for building equipment and industrial installations - Cellular glass products - Specification - defines requirements, test methods, designation, marking and labelling for factory-made cellular glass thermal insulation used on building services and industrial installations. The standard covers products manufactured as slabs, faced or unfaced boards, pipe sections, segments and prefabricated ware and applies to an operating temperature range of approximately −265 °C to +430 °C. It excludes products with a declared thermal conductivity greater than 0.065 W/(m·K) and products intended for insulating the building structure.

Key technical topics and requirements

• Product forms and scope: Slabs, boards, tapered/flat products, pipe shells, segments and prefabricated items produced from blocks by sawing, cutting or trimming.
• Thermal conductivity (λ): Manufacturers must declare a conductivity curve (typically −170 °C to 350 °C where applicable) and provide λ(10 °C). Values are expressed with three significant figures and rounded upwards to 0.001 W/(m·K). Declared λ must meet the levels in the standard (≤ 0.065 W/(m·K) limit).
• Mechanical and durability properties: Compression strength, bending strength, point load, compressive creep and long‑term water absorption are specified with required test methods and specimen counts.
• Dimensional and physical properties: Dimensions, squareness, flatness, thickness, pipe linearity and trace quantities of water‑soluble ions (and pH) are addressed.
• Hygrothermal and vapour properties: Water vapour diffusion resistance and moisture measurement procedures are referenced.
• Fire behaviour and service temperatures: Reaction-to-fire test references and maximum/minimum service temperature determination are included.
• Testing and factory production control (FPC): Clause 6 details sampling, conditioning and testing; Annex A covers FPC requirements for manufacturers.
• Designation, marking and labelling: The standard establishes a designation code and required labelling information to ensure clarity for procurement and installation.

Practical applications and users

ISO 24285:2022 is primarily used by:

• Manufacturers of cellular glass insulation to define product specifications and FPC.
• Specifiers and consulting engineers selecting insulation for building services and industrial process lines (cryogenic to high-temperature applications).
• Procurement and project teams requiring clear designation, marking and test evidence for purchased insulation.
• Testing laboratories and conformity assessors carrying out thermal, mechanical and durability tests referenced in the standard.
• Insulation contractors and installers who need product data for correct application on pipework, HVAC equipment and industrial installations.

Related standards (select references within ISO 24285)

The standard references several test and measurement standards, for example:

• ISO 8301, ISO 8302 (thermal resistance measurement)
• ISO 8497 (cylindrical specimen thermal testing)
• ISO 13787 (declared thermal conductivity)
• ISO 29465 / ISO 29466 / ISO 29469 (dimensions, thickness, compression)
• ISO 11925‑2 / ISO 1182 (fire tests)

Keywords: ISO 24285:2022, cellular glass, thermal insulation, thermal conductivity, factory-made insulation, pipe insulation, insulation testing, specification, FPC.