SEDIMENT TESTS SEDIMENT IN CRUDE AND FUEL OILS: ASTM D473
(Equivalent Test Methods: IP 53, ISO 3735, DIN 51789, and AFNOR M07-063)
GENERAL
There are several sediment tests that differ from each other only in details of the procedure such as the solvent used, time, or speed of centrifugation, or both.
EXPLANATION
A knowledge of the sediment content of crude and fuel oils is important both to the refining operations and the buying or selling of the oil.
TEST SUMMARY
An oil sample contained in a refractory thimble is extracted with hot toluene until the residue reaches a constant mass.
TEST PRECISION
In the sediment range 0 to 0.4 % sediment, the repeatability is 0.017 + 0.255X, and reproducibility is 0.033 + 0.255X, where X is the average sediment result in percent. Precision on recycled oils and crank case oils is unknown.
