石油产品 - 润滑油过滤性的测定 - 第1部分:在水存在下的油的程序

[中文适用范围]： 本文件规定了在存在水分的情况下评估润滑油滤过性的程序。由于使用测试膜时可能不兼容，因此该程序仅适用于矿物基油；其他材料制成的流体（例如耐火流体） 本文件适用于粘度不超过 ISO 粘度等级（VG）100 的油，如 ISO 3448 中所定义。在所述范围内，由于粘度变化引起的滤过性变化包括在本文件规定的精度范围内。 对于某些液压油，由于使用了不可溶或部分可溶的添加剂，或者特别大的分子物质（例如一些粘度指数改进剂和一些摩擦改进添加剂），该程序不适用于这些油。 [外文原描述]： This document specifies a procedure for the evaluation of the filterability of lubricating oils in the presence of water. The procedure only applies to mineral-based oils, since fluids manufactured from other materials (e.g. fire-resistant fluids) can be incompatible with the specified test membranes. This document is applicable to oils of viscosity up to ISO viscosity grade (VG) 100, as defined in ISO 3448. Within the range described, the variation in filterability due to viscosity is included within the precision range of this document. The procedure is not suitable for some hydraulic oils on which specific properties are conferred by the use of insoluble or partially soluble additives, or by particularly large molecular species. These additives include some viscosity index modifiers and some friction modifying additives. This document can also be applied to oils of ISO viscosity grades (VG) 150, 220 and 320, as defined in ISO 3448, using the specified 3,0 µm rated membranes. These oils are widely used as heavy-duty lubricants in equipment such as paper making machines and rolling mills. Within the range described, the filterability as defined is not dependent on the viscosity of the oil.