1.1 本规程涵盖了在制造、储存和交付点对沥青进行取样的程序。 1.2 以国际单位制表示的数值应视为标准。括号中的值仅供参考。 1.3 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 具体警告说明见第节 12 . 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 5.1 采样与测试同样重要。如果采样不正确，材料的样本将出现错误，分析将无法代表材料的真实特性，并且可能不可能或不可行地采集另一个样本；然而，如果正确地采集样本并且分析有误，则可以容易地对原始样本进行另一次分析。 5.2 取样可用于以下两种目的之一: 5.2.1 尽可能接近所采样材料体积的平均值，或 5.2.2 确定材料特性的最大变化。 5.3 一个好的抽样计划具有以下特点: 5.3.1 它保护消费者不受不良材料的影响。 5.3.2 它保护生产商不被拒绝一批好的材料。 5.3.3 它为消费者提供了长期保护。 5.3.4 它鼓励制片人控制自己的过程。 5.3.5 它最大限度地降低了采样、检测和管理的成本。 5.3.6 它提供有关产品质量的信息。 5.4 采样完整性-- 当一个人取一个样品时，他试图用该样品代表一批或多批材料。不同形式的沥青以及不同类型容器中的沥青需要有不同的采样计划和适当的采样设备。每个抽样计划的设计都应确保其实现其目标，即确定一批或一批材料的特性或质量。

1.1 This practice covers procedures for sampling pitch at points of manufacture, storage, and delivery. 1.2 The values stated in SI units are to be regarded as standard. The values in parentheses are for information only. 1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific warning statements are given in Section 12 . 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 Sampling is as important as testing. If the sampling is improperly done, the sample of the material will be in error, and the analysis will not represent the true properties of the material, and it may be impossible or impracticable to take another sample; whereas, if the sample is properly taken and the analysis is in error, another analysis can readily be made of the original sample. 5.2 Samples may be taken for either of the following two purposes: 5.2.1 To represent as nearly as possible an average of the bulk of the materials sampled, or 5.2.2 To ascertain the maximum variation in characteristics which the material possesses. 5.3 A good sampling plan has the following characteristics: 5.3.1 It protects the consumer against the acceptance of a bad batch of material. 5.3.2 It protects the producer against the rejection of a good batch of material. 5.3.3 It gives long-range protection to the consumer. 5.3.4 It encourages the producer to keep his process in control. 5.3.5 It minimizes the cost of sampling, inspection of testing, and administration. 5.3.6 It provides information concerning the quality of the product. 5.4 Sampling Integrity— When one takes a sample, one is attempting to represent a batch or lot of material with that sample. Different forms of pitch, and pitch in different types of containers, need to have different sampling plans and appropriate sampling equipment. Each sampling plan should be designed so that it accomplishes its objective, which is to ascertain the characteristics or quality of a batch or lot of material.