Standard Test Method for Precipitation Number of Lubricating Oils
Standard Test Method for Precipitation Number of Lubricating OilsD0091-02R07E01ASTM|D0091-02R07E01|en-USStandard Test Method for Precipitation Number of Lubricating OilsStandardD91 Standard Test Method for Precipitation Number of Lubricating Oils>newBOS Vol. 05.01 Committee D02
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Significance and Use
Fully refined petroleum oils normally contain no naphtha insoluble material. Semirefined or black oils frequently contain some naphtha insoluble material (sometimes referred to as asphaltenes). This test measures the amount of naphtha insoluble material in the oil. This quantity is reported as the precipitation number.
Scope
1.1 This test method covers the determination of the precipitation number of steam cylinder stocks and black oils, and can be used for other lubricating oils.
1.2 The values stated in acceptable SI units are to be regarded as the standard.
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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