Home / Standards / GB/T 2998-2015 GB/T 2998-2015 Active Test method for bulk density and true porosity of shaped insulating refractory products 定形隔热耐火制品体积密度和真气孔率试验方法 Standard Type GBT ICS 81.080 CCS Q40 Status 现行 Issue Date 2015-12-10 Implementation 2017-01-01 Responsible Dept 国家标准委 Drafting Unit N/A