石油产品和相关产品 运动粘度的测定 稳定型粘度计法

[中文适用范围]： 本文件规定了使用 Stabinger 型粘度计通过计算透明和不透明液体石油产品和原油的动态粘度 η 和密度 ρ 来确定运动粘度 ν 的程序。使用本文件中所述程序获得的结果取决于样品的流变行为。本文件主要适用于剪切应力和剪切速率成比例的液体（牛顿流动行为）。如果粘度随剪切速率发生显著变化，则除非剪切速率相似，否则无法与其他测量方法进行比较。仅针对第 13 条中描述的材料、密度范围和温度确定了精度。该测试方法可应用于更广泛的粘度、密度、温度和材料。精度和偏差可能适用于第 13 条中未列出的材料。 [外文原描述]： This document specifies a procedure for the determination of kinematic viscosity, ν , by calculation from dynamic viscosity, η , and density, ρ , of both transparent and opaque liquid petroleum products and crude oils using the Stabinger type viscometer. The result obtained using the procedure described in this document depends on the rheological behaviour of the sample. This document is predominantly applicable to liquids whose shear stress and shear rate are proportional (Newtonian flow behaviour). If the viscosity changes significantly with the shear rate, comparison with other measuring methods is not possible except at similar shear rates. The precision has been determined only for the materials, density ranges and temperatures described in Clause 13. The test method can be applied to a wider range of viscosity, density, temperature and materials. It is possible that the precision and bias are applicable for materials which are not listed in Clause 13.