本国际标准根据以下特性对褐煤进行分类:以无灰为基础计算的总含水量；以干燥、无灰为基础计算的焦油含量。表中给出了褐煤类型的类别号、组号和代码号。

Brown coals are classified in this International Standard according to the following properties: total moisture content calculated on the ash-free basis; tar hiels calculated on the dry, ash-free basis. In tables class numbers, group number and code numbers of brown coal types are given.