ISO 18413:2015规定了检查文件的内容，该文件规定了指定液压流体动力部件的清洁度要求以及用于评估其清洁度水平的检查方法。此外，还提供了相关提取方法和分析方法的指南。 确定任何特定部件的适当清洁度要求超出了ISO 18413:2015的范围。ISO 12669提供了一种确定液压系统所需清洁度的方法。ISO TR 10686提供了一种将部件所需清洁度与液压系统所需清洁度联系起来的方法。 就ISO 18413:2015而言，经批准的功能性液体被视为成分。 ISO 18413:2015适用于任何液压传动系统部件的湿润表面和体积上的颗粒污染。ISO 18413:2015未涵盖外观缺陷和液体或气体污染。 ISO 18413:2015并未解决与使用相关的危险材料、操作和设备可能产生的安全问题。ISO 18413:2015的使用者负责制定适当的安全和健康实践，并在使用前确定监管限制的适用性。

ISO 18413:2015 specifies the content of an inspection document that specifies both the cleanliness requirement for the specified hydraulic fluid power component and the inspection method to be used for evaluating its cleanliness level. In addition, guidelines for relevant extraction methods and analysis methods are given. Determination of what constitutes as an appropriate cleanliness level requirement for any particular component is beyond the scope of ISO 18413:2015. ISO 12669 provides a method of determining the required cleanliness of a hydraulic system. ISO TR 10686 provides a method of relating the required cleanliness of components to the required cleanliness of the hydraulic system. For the purposes of ISO 18413:2015, approved functional liquids are considered to be components. ISO 18413:2015 is applicable to the particulate contamination on the wetted surfaces and volumes of any hydraulic fluid power system component. Appearance defects and liquid or gaseous contamination are not covered by ISO 18413:2015. ISO 18413:2015 does not address safety problems that might arise from hazardous materials, operations, and equipment associated with its use. The user of ISO 18413:2015 is responsible for establishing appropriate safety and health practices and determining the applicability of regulatory limitations prior to use.