Overview
EN ISO 18096:2022 (CEN-adopted) specifies a standardized test method for determining the maximum service temperature of preformed pipe insulation used in building equipment and industrial installations. It defines the equipment, specimen preparation, test procedure and result expression used to decide the highest temperature at which a thermal insulating product continues to perform within specified limits (dimensional stability, thermal/mechanical properties, appearance and safety hazards such as internal self‑heating).
Key facts:
- Published as ISO 18096:2022 and endorsed by CEN as EN ISO 18096:2022 (supersedes EN 14707:2012).
- Applicable to a wide range of thermal insulating products for piping systems.
Key topics and requirements
- Test principle: one‑sided heat treatment of preformed pipe specimens to a candidate maximum service temperature; thickness is measured during heat exposure and length after cooling (procedure can be iterative).
- Apparatus: includes a hot pipe with uniform temperature in the measuring zone, end insulation, temperature sensors (accuracy ±1 % but not less than ±1 °C), flexible metal foil to apply a uniform pressure (example: 500 Pa), and a device for measuring thickness during the test (resolution 0.1 mm).
- Temperature control & heating rates: hot pipe must be controllable to within ±2 % or ±10 °C (whichever is smaller) over the central 60 % of pipe length; heating rates specified (examples in the standard: 50 °C/h and 300 °C/h).
- Specimen requirements: dimensions, number and conditioning (reference to ISO 12628 and ISO 16544 for dimensional and conditioning methods).
- Results & accuracy: thickness deformation versus time, additional observations (including internal self‑heating), and measurement accuracy aligned with ISO 5725‑2 guidance on repeatability and reproducibility.
- Material‑specific annexes: normative modifications/additions for mineral wool, polyethylene foam (PEF), flexible elastomeric foam (FEF), and phenolic foam products.
Applications
- Verifying the maximum service temperature rating for preformed pipe insulation used in:
- HVAC systems, hot water and steam distribution
- Process piping in industrial installations, refineries and chemical plants
- Building services and mechanical rooms
- Supporting product datasheets, performance claims, conformity assessment and product development.
Who should use this standard
- Insulation manufacturers and R&D labs validating product temperature limits
- Third‑party test laboratories and certification bodies
- Specifiers, consulting engineers and procurement teams requiring validated insulation temperature ratings
- Regulatory authorities and compliance assessors
Related standards
- ISO 12628 - dimensions of preformed pipe insulation
- ISO 16544 - conditioning to moisture equilibrium
- ISO 5725‑2 - accuracy (repeatability and reproducibility) of measurement methods
- EN 14707 - superseded by EN ISO 18096:2022
By applying EN ISO 18096:2022, stakeholders ensure consistent, repeatable determination of maximum service temperatures for preformed pipe insulation - supporting safer, more reliable thermal insulation selection and specification.