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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 15224.2-2021 |
Classification for quality of coal—Part 2: Sulfur content 煤炭质量分级 第2部分：硫分 |
China National Standards coal—Part |
 English PDF |
| GB/T 15224.1-2018 |
Classification for quality of coal—Part 1: Ash 煤炭质量分级 第1部分：灰分 |
China National Standards coal—Part |
English PDF |
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