1.1本规程涵盖了I-B-1和I-B-2类样品的机械采集程序（规程D 2234/D 2234M） )以及利用机械采样系统的各种组件在系统内制备（减少和分割）总样本。 1.2本规程描述了煤的机械取样程序 (1) 按制备的大小和条件（例如，机械净化煤或原煤）和 (2) 通过采样特征。 1.3以国际单位制或英寸-磅单位表示的数值应单独视为标准值。在文本中，英寸-磅单位显示在括号中。每个系统中规定的值可能不是精确的等效值；因此，独立使用每个系统。 将两个系统的值合并可能会导致不符合标准。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 ====意义和用途====== 本规程旨在提供代表所采集煤炭的样本。由于煤炭的可变性和可用的机械采样设备种类繁多，在样品采集过程、采样系统规范设计、设备采购和已安装设备的验收测试的所有阶段都应谨慎。 从取样系统中移除并进一步准备后（实施规程D 2013 )，可以分析样本的许多不同参数。这些参数可以定义地块的价值、其满足规范的能力、其环境影响以及其他属性。

1.1 This practice covers procedures for the mechanical collection of a sample under Classification I-B-1 and I-B-2 (Practice D 2234/D 2234M ) and the within-system preparation (reduction and division) of gross samples utilizing various components of the mechanical sampling system. 1.2 This practice describes mechanical sampling procedures for coals (1) by size and condition of preparation (for example, mechanically cleaned coal or raw coal) and (2) by sampling characteristics. 1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text the inch-pound units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, use each system independently of the other. Combining values from the two systems may result in nonconformance with the standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== It is intended that this practice be used to provide a sample representative of the coal from which it is collected. Because of the variability of coal and the wide variety of mechanical sampling equipment available, caution should be used in all stages of the sample collection process, the design of sampling system specifications, the equipment procurement and the acceptance testing of installed equipment. After removal from the sampling system and further preparation (Practice D 2013 ), the sample may be analyzed for a number of different parameters. These parameters may define the lot's value, its ability to meet specifications, its environmental impact, as well as other properties.