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工业润滑油过去没有统一的粘度分类,由于产品和规格不同,粘度分类参差不一,给判别粘度的等级、对照产品之间的规格及选用润滑油等造成困难。国际标准化组织(International Organization for Standarzation)于1975年制定了ISO3448(工业润滑油粘度分类),并研究工业润滑油分类与规格问题,准备制订国际工业润滑油的统一规格。ISO3448规定以40℃粘度为基准,把从2～1500厘沲的粘度分成18个等级,每一级粘度较前一级增加50%,规定各级粘度范围为中心值的±10%(见附表ISO VG分类)。美、英、法等国已经采用了ISO粘度分类,日本的石油商社于78年4月着手研究采用ISO粘度分类,日本工业标准组织于78年6月结合ISO3448制定了JIS K2001(工业用
There is no uniform classification of industrial lubricants in the past, due to different products and specifications, viscosity classification varies, to determine the level of viscosity, control the product specifications and the choice of lubricating oil and other difficulties. The International Organization for Standarzation (ISO) formulated the ISO 3448 (Industrial Lubricant Viscosity Classification) in 1975 and studied the classification and specification of industrial lubricants in preparation for the development of a uniform specification for international industrial lubricants. ISO 3448 stipulates that the viscosities from 2 to 1500 centistokes should be divided into 18 grades based on the viscosity at 40 ° C and the viscosity of each grade should be increased by 50% compared with the previous grade, and the viscosity range at all levels should be ± 10% of the center value Table ISO VG classification). The United States, Britain, France and other countries have adopted the ISO viscosity classification, Japan’s oil trading company in April 78 to study the use of ISO viscosity classification, Japanese Industrial Standards Organization in June 78 with ISO3448 developed JIS K2001 (industrial