BS EN 12939-2001 建筑材料和产品的热性能.用护热板和热流计测定热阻.高和中热阻的厚产品

标准号：BS EN 12939-2001
中文标准名称：建筑材料和产品的热性能.用护热板和热流计测定热阻.高和中热阻的厚产品
英文标准名称：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
标准类型：Q04
发布日期：2001/1/15 12:00:00
实施日期：2001/1/15 12:00:00
中国标准分类号：Q04
国际标准分类号：91.100.60
适用范围：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.