ISO 6743-3:2003确立了D系列、空气压缩机、气体压缩机和制冷压缩机中使用的润滑剂的详细分类。 ISO 6743-3:2003的目的是为空气、气体和制冷压缩机提供一系列合理的国际上最常用的润滑剂，而无需通过规范或产品说明进行不必要的限制。 本分类的主要目的是描述和推广最适合特定应用的润滑剂类型，尤其是固定式空气压缩机，目的是尽可能降低火灾和爆炸风险。 ISO 5388中给出了相关的安全规则。 ISO 6743-3:2003应与ISO 6743-99一起阅读。

ISO 6743-3:2003 establishes the detailed classification of lubricants for use in family D, air compressors, gas compressors and refrigeration compressors. The intention of ISO 6743-3:2003 is to provide a rationalized range of the most commonly used internationally available lubricants for air, gas and refrigeration compressors, without resorting to unnecessary restriction by specifications or products description. The primary intention of this classification is to describe and promote the use of the type of lubricant which is best suited for the particular application, specifically with stationary air compressors, with the aim of reducing as far as possible the risks of fire and explosion. Relevant safety rules are given in ISO 5388. ISO 6743-3:2003 should be read in conjunction with ISO 6743-99.