GB/T 2998-2015 specifies the test method for the volume density and true porosity of shaped insulated refractory products. It details the required equipment, such as Balance, caliper, boiling device, etc. After the sample is prepared, the volume density and true porosity are calculated according to the standard formula by measuring the size, mass and mass change before and after boiling. The method is operated with specifications and accurate data. It provides a reliable basis for manufacturers to control the mass of products, ensure the thermal insulation performance and structural Stability of shaped insulated refractory products in high temperature environments, and help related industries to select and apply accurate materials.