The certification of the thermal conductivity of a resin bonded glass fibre board: ERM®-FC440a, ERM®-FC440b and ERM®-FC440c
This report describes the production of ERM-FC440, which is a resin-bonded glass fibre insulation material certified for its thermal conductivity in dependence of the temperature. This material was produced and certified in accordance with ISO 17034:2016 and ISO Guide 35:2017.
Commercially available glass fibre insulation material was purchased. Tracks from processing were removed by sanding and the material was cut into units suitable for measurement. The CRM is available in in sizes of 30 cm x 30 cm, 50 cm x 50 cm and 60 cm x 60 cm.
Between-unit homogeneity was quantified and stability during dispatch and storage was assessed in accordance with ISO Guide 35:2017. Within-unit homogeneity was assessed to determine the minimum sample size. The minimum sample size is 20 cm x 20 cm.
The material was characterised by an interlaboratory comparison of laboratories of demonstrated competence and adhering to ISO/IEC 17025:2017. All datasets were found technically valid and the certified value, thermal conductivity as a function of temperature, was obtained by linear least squares regression of all data points.
Uncertainties of the certified values were calculated in accordance with ISO 17034:2016 and ISO Guide 35:2017 and include uncertainties related to possible inhomogeneity, instability and characterisation.
The materials is intended for the quality control and assessment of method performance for guarded hot plate measurements as well as for calibration of heat flow meter instruments. As with any reference material, it can be used for establishing control charts or validation studies.
Before release of the CRM, the certification project was subjected to peer-review involving both internal and external experts.
LINSINGER Thomas;
2021-10-26
Publications Office of the European Union
JRC126677
978-92-76-42259-4 (online),
1831-9424 (online),
EUR 30859 EN,
OP KJ-NA-30859-EN-N (online),
https://publications.jrc.ec.europa.eu/repository/handle/JRC126677,
10.2760/759309 (online),
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