石油产品——润滑油可过滤性的测定第2部分:干油的程序

[中文适用范围]： 本文件规定了测定干式润滑液压油过滤性的程序。这些方法仅适用于矿物油基液压油，因为由其他材料（如阻燃流体）制成的流体可能与指定测试膜不兼容。 这些方法适用于粘度不超过 ISO 粘度等级 (VG) 100 的液体，如 ISO 3448 中所定义。这些油被广泛用作液压流体，在所述范围内，由于粘度引起的过滤性变化包括在本文件的精度范围内。 这些方法不适用于某些具有特定性能的液压油，这些性能是由于使用了不可溶或部分可溶的添加剂，或由特别大的分子物质赋予的。这些添加剂包括一些粘度指数改进剂和一些摩擦改良添加剂。 这些方法也可用于 ISO 粘度等级 (VG) 150、220 和 320 的油，如 ISO 3448 中所定义，使用指定的 3.0μm 等级膜。这些油被广泛用作纸浆机和轧机等设备中的重型润滑油。在所述范围内，所定义的过滤性不依赖于油的粘度。 [外文原描述]： This document specifies a procedure for the evaluation of the filterability of dry lubricating oils. 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. These oils are widely used as hydraulic fluids, and 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.