GB/T 15224.3-2022 Translated English of Chinese Standard (GB/T15224.3-2022, GBT 15224.3-2022): Classification for quality of coal -- Part 3: Calorific value

This document specifies the classification, naming and inspection of coal calorific value according to the range of high calorific value on dry basis (Qgr,d). This document is applicable to the exploration and evaluation of coal resources. It guides the production, processing and utilization of coal.