Thermal insulation material bulk density
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For the insulation project that our company is currently working on, the designed bulk density of the rock wool is 150 KG/M3 (1000*600*75*4 pieces per pack). The management company ignores the provisions of standard GB/T11835-2007; it requires that the weight of each sample pack taken for inspection be no less than 24.5 KG per pack, and that the average weight of such samples be no less than 26.5 KG per pack. As a result, 2/5 of the goods supplied by the manufacturer do not meet the requirements. According to standard GB50126--2008, the density of soft materials should not exceed 150 KG/M3. Could any experienced colleague give me some advice? What should we do?
In addition to meeting the **current relevant product standards**, the main physicochemical properties of thermal insulation materials must also have thermal conductivity and density that satisfy the relevant requirements in their actual state of use. It is not possible to simply determine whether a product is qualified based on density testing alone.
If other indicators are difficult to measure, they control the bulk density instead
I worked on a project before. The insulation material brought to the site appears to be of substandard quality. It’s yellow in color. And it’s rather scattered. The manufacturer also came to the site and explained it at that time. There was a long argument. It was later sent to a testing facility for inspection, and surprisingly, it passed. Later, construction proceeded normally! The poster isn’t likely to be from a insulation manufacturer. Please have the manufacturer handle the coordination!
Regarding insulation materials, the specifications vary by location: in some places there is an upper limit for bulk density, specifying a maximum value; the main concern is the weight of the insulated area. In other places, a minimum value is required. Based on the data you provided, the weight of one pack should be around 27 kg