(Equivalent Test Methods: IP 375 and ISO 10307)
EXPLANATION
Appreciable amounts of sediment in a residual fuel oil can foul the handling facilities, and give problems in burner mechanisms. Sediment can accumulate in storage tanks, on filter screens, or on burner parts, resulting in obstruction of the oil flow from the tank to the burner. This test method is applicable up to sediment levels of 0.40 m/m % for distillate fuel oils containing residual components, and to 0.50 m/m % in residual fuel oils having a maximum viscosity of 55 cSt at 100° C. Some fuels may exceed the maximum filtration time specified in the test due to factors other than the presence of significant quantities of insoluble organic or inorganic material.
TEST SUMMARY
A 10-g sample of oil is filtered through the prescribed apparatus at 100° C. After washing with the solvent, and drying, the total sediment on the filter medium is weighed. The test is to be carried out in duplicate.
TEST PRECISION
Where X is the average of the test result in m/m %.
The bias of this test method has not been determined.