Standard No.:	SH/T 0024-1990
English Name:	Determination of precipitation number for lubricating oil
Chinese Name:	润滑油沉淀值测定法
Chinese Classification:	E34    Lubricating oil
Professional Classification:	SH    Professional Standard - Petrochemical
Issued by:	China Petrochemical Corporation
Issued on:	1991-03-27
Implemented on:	1992-4-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	2000 words
Price(USD):	204.0
Delivery:	via email in 1 business day

1 Subject Content and Application Scope This standard specifies the determination of the precipitation number of lubricating oils. This standard is applicable to lubricating oils. 2 Normative References GB/T 262 Petroleum Products-Determination of Aniline Point GB/T 1884 Crude Petroleum and liquid Petroleum Products-Laboratory Determination of Density-Hydrometer Method GB/T 1885 Petroleum Measurement Tables GB/T 4756 Petroleum Liquids-Manual Sampling GB/T 6536 Petroleum Products-Determination of Distillation 3 Method Summary At room temperature, take 10 mL of test specimen and dilute it until 100 mL with precipitation petroleum ether. After homogeneous mixing, rotate the centrifuge tube for 10 min under a relative centrifugal force between 600 ~ 700. And the millilitres of precipitate formed at the bottom of the centrifuge tube shall be regarded as the precipitation number of test specimen.

Contents 1 Subject Content and Application Scope 2 Normative References 3 Method Summary 4 Apparatus 5 Reagent 6 Test Procedures 7 Calculation 8 Precision 9 Report Appendix A Quality Requirements for Precipitation Petroleum Ether (Additional) Additional Explanations