本SAE推荐实施规程旨在促进和认可 ISO（国际标准化组织）的使用 污染物代码是表示颗粒物水平的通用方法 液压油中的污染物，并用于规定可接受的清洁度限值。 该编码系统获得了全球认可，因为它提供了 简单、无误、有意义且一致的沟通方式 在供应商和用户之间。

This SAE Recommended Practice has been formulated to advance and endorse the use of the ISO (International Organization for Standardization) Solid Contaminant Code as the universal means for expressing the level of particulate contaminant in hydraulic fluid and for specifying acceptable limits of cleanliness. Worldwide approval was gained for this coding system because it provides a simple, unmistakable, meaningful, and consistent means of communication between suppliers and users.