DIN EN 12939:2025-11
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; German and English version prEN 12939:2025 / Note: Date of issue 2025-10-10*Intended as replacement for DIN EN 12939 (2001-02).
| Fecha edición: |
2025-11-01
En Vigor
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| Idiomas disponibles: | Alemán, Inglés |
| Resumen: | 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. |
| Keywords: | Behaviour|Boards|Bushings|Checking equipment|Construction|Construction materials|Constructional products|Descriptions|Determination|Electrical appliances|Heat|Heat flow|Heat flow density|Heat transfer|Heat-measuring instruments|Instruments|Laboratory testing|Materials|Mathematical calculations|Measurement|Measuring equipment|Measuring instruments|Measuring plates|Measuring techniques|Plate apparatus|Preconditioning|Pretreatment|Resistors|Samples|Temperature differences|Test equipment|Test specimens|Testing|Thermal conductivity|Thermal protection|Thermal resistance|Thermal transmission coefficient|Thermal transmittance|Thermodynamic properties|Thickness |
| ICS: | 91.100.60 - Materiales para aislamiento térmico y acústico |
| CTN: |
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