食品级润滑油三个类别：
Three categories of food grade lube oil:
HI类食品级润滑油--指与食品发生偶然性接触的润滑油。该类润滑油多用于食品加工机械，依附于设备表面起防锈作用，在垫圈表面起隔离作用，或者用于存储罐的密封，也可以用于食品加工机械暴露于食物的机械部分的润滑。该部分的润滑油的成分定名为HX-1。
Class HI food grade lubricants - lubricants that are incidental to food. This kind of lubricating oil is mostly used in food processing machinery, which is attached to the surface of the equipment, plays an antirust function, plays an isolating effect on the surface of the washer, or is used for the seal of the storage tank, and can also be used for the lubrication of the mechanical parts of food processing machinery. The component of the lubricating oil in this part is named HX-1.
H2类食品级润滑油--该类润滑油不与食物直接接触，可用于机械设备的封闭系统内各部件的润滑、防锈和隔离等。
Class H2 food grade lubricants, which are not directly exposed to food, can be used for lubrication, rust prevention and isolation of various parts of a mechanical system.
H3类食品级润滑油--该类润滑油用于挂钩、起吊等相关设备的防锈、清洁等。该类设备在重复使用之前必须除油清洁。
Class H3 food grade lubricants - such lubricants are used for rust prevention and cleaning of related equipment such as hooks, lifting and so on. Such equipment must be cleaned up before oil is reused.