標準號：BS 4231-1992
中文標準名稱：工業液體潤滑劑粘度等級分類
英文標準名稱：Classification for viscosity grades of industrial liquid lubricants
標準類型：J21
發布日期：1992/12/15 12:00:00
實施日期：1992/12/15 12:00:00
中國標準分類號：J21
國際標準分類號：75.100
適用范圍：This International Standard establishes a system of viscosity classification for industrial liquid lubricants and related fluids. This includes mineral oils used as lubricants, hydraulic fluids, electrical oils and for other applications The usual method for kinematic-viscosity determination is that specified in ISO 3104, but this may give anomalous results when used with non-Newtonian fluids (i.e. those whose coefficient of viscosity varies significantly with rate of shear). For such fluids, it is therefore important to state the particular method by which viscosity has been de-termined. It is also recognized that there may be some pure chemicals and naturally occurring products, used as lubricants, which will not fall within this classifi-cation.