RO
SR EN 12939:2002
Thermal performance of building materials and products - Determination of thermal resistance by means of guarded hot plate and heat flow meter methods - Thick products of high and medium thermal resistance
This standard gives the procedures to determine the thermal resistance of products the thicknesses of which exceed the maximum thickness for guarded hot plate or heat flow meter apparatus. In any case most of the procedures described in this standard require apparatus that allows tests on specimens up to 100 mm thick. This standard gives guidelines to assess the relevance of the thickness effect, i.e. to establish whether the thermal resistance of a thick product can or cannot be calculated as the sum of the thermal resistances of slices cut from the product, these guidelines complement the indications given in ISO 8302:1991 on the guarded hot plate apparatus.This standard describes testing conditions which prevent the onset of convection. which could take place in some products under the considered temperature differences and thicknesses.
Status :
Valid
Approval date : 10/31/2002
Publish date : 11/1/2002
Number of pages : 38
ICS : 91.100.60 Thermal and sound insulation materials
Technical Committee : 281 - Buildings thermal performance of and buildings components
- Normative reference SR EN 1946-2:2004
- Normative reference SR EN ISO 7345:2002
- Normative reference SR EN 12667:2002
- Normative reference SR EN ISO 9288:2002
- Normative reference SR EN 1946-3:2004