By R. A. Nadkarni
It's severe for trying out laboratory group of workers to be totally acquainted with the entire info of the exams they're acting. however it is usually vital for non-laboratory team of workers to grasp at the least the importance, merits, barriers, and precision of specific exams used to represent product caliber. basically by way of figuring out the professionals and cons of those checks can either providers and shoppers succeed in sound conclusions and agree at the acceptable caliber and function of a product.For the 1st time ever, the basic parts of all criteria analytical checks used to signify petroleum items and lubricants come in one designated quantity. short descriptions of the 350 checks defined, comprise rules concerned, try out precis, merits, barriers, and try precision information. the place on hand an identical exams from IP, ISO, JIS, DIN, and AFNOR also are referenced.
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Additional resources for Guide to Astm Test Methods for the Analysis of Petroleum Products and Lubricants (Astm Manual Series)
A sample is shaken with water and the aqueous layer is tested for acidity using methyl orange indicator (red color). Basicity can be determined using phenolphthalein indicator (pink color) instead of the methyl orange indicator. TEST PRECISION This is a pass-fail qualitative test and no precision or bias estimates can be made. 18 GUIDE TO A S T M TEST M E T H O D S FOR THE A N A L Y S I S OF P E T R O L E U M P R O D U C T S AND L U B R I C A N T S ACTIVE SULFUR IN CUTTING OILS: D 1662 EXPLANATION TEST SUMMARY This test measures the amount of sulfur available to react with metallic surfaces to form solid lubricating aids at the temperature of the test.
These laboratory test results have predicted as failures the known engine oils that have failed in the field due to the lack of oil pumpability. These documented field failing oils have all consisted of oils normally tested at -25~ These field failures are believed to be the result of the oil forming a gel structure that results in excessive yield stress or viscosity of the engine oil, or both. This test method covers the measurement of the yield stress and viscosity of engine oils after cooling at controlled rates over a period exceeding 45 h to a final test temperature between - 1 5 and -30~ The applicability to petroleum products other than engine oils has not been determined.
Any residual mineral acid in a petroleum product is undesirable. This test makes a qualitative determination of the acidity of hydrocarbon liquids and their distillation residues. The results are qualitative. Basicity determination can also be done by a small change in the procedure (see below). A sample is shaken with water and the aqueous layer is tested for acidity using methyl orange indicator (red color). Basicity can be determined using phenolphthalein indicator (pink color) instead of the methyl orange indicator.