本文件描述了一个简单的煤分类系统 -煤炭分析和测试的适当ISO标准程序选择指南， -煤炭在一些关键特性方面的国际比较， -煤的描述性分类。 该系统适用于所有等级的煤炭，但在某些类型煤炭的分类方面需要谨慎。 该系统可应用于范围广泛的代表性煤样，前提是说明了它们的确切性质。此类样品包括钻孔岩芯煤层剖面和复合样品、原煤（已开采）煤、洗煤、相似煤级和选定的指定粒度的混合煤。 该系统提供了一个广泛的框架，在此框架内可以对煤炭进行评估。为特定用途选择煤炭需要详细信息，以便预测煤炭在特定应用中的可能性能。 煤的ISO分析和测试程序的广泛列表可用于此目的。根据预期用途，选择用于评估煤炭的适当程序。

This document describes a simple classification system for coals providing — guidance on the selection of the appropriate ISO standard procedures for the analyses and testing of coals, — international comparison of coals in terms of some key characteristics, — descriptive categorization of coals. The system is applicable to coals of all ranks, but care is required in relation to the classification of some types of coal. The system can be applied to a wide range of representative coal samples, provided their exact nature is stated. Such samples include bore-core seam sections and composite samples, raw (as-mined) coal, washed coal, blends of coals of similar rank and selected, specified size fractions. The system provides a broad framework within which coals can be assessed. The selection of coals for a specific use requires detailed information that enables the likely performance of a coal in a particular application to be anticipated. The wide-ranging list of ISO analyses and test procedures for coals serve this purpose. The selection of the appropriate procedures to be used in assessing a coal depends on the intended use.