ASTM D2500 CLOUD POINT PDF

Filterability Cloud Point A number of tests are available to measure low temperature properties of fuels for diesel engines and to estimate their effect on vehicle low temperature operability. It is also a reasonable estimate of the low temperature operability limit of fuels that do not contain operability additives. The cloud point is defined as the temperature at which a cloud or a haze of wax crystals starts to appear in the fuel under the test conditions. These crystals can collect in filters and eventually lead to blockage of the fuel system. Fuel additives that improve low temperature operability usually have little impact on cloud point. These additives are used in diesel fuel to prevent agglomeration or modify these crystals in other ways to limit filter blockage.

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Filterability Cloud Point A number of tests are available to measure low temperature properties of fuels for diesel engines and to estimate their effect on vehicle low temperature operability. It is also a reasonable estimate of the low temperature operability limit of fuels that do not contain operability additives. The cloud point is defined as the temperature at which a cloud or a haze of wax crystals starts to appear in the fuel under the test conditions.

These crystals can collect in filters and eventually lead to blockage of the fuel system. Fuel additives that improve low temperature operability usually have little impact on cloud point.

These additives are used in diesel fuel to prevent agglomeration or modify these crystals in other ways to limit filter blockage. A number of different manual and automatic options for performing this test have been developed.

The sample is then poured into a test jar which is closed with a cork fitted with a thermometer measuring the sample temperature on the bottom of the jar. The sample is cooled in a cooling bath maintained at a constant temperature Figure 1 by placing the sample jar into a jacket that had previously been placed into the cooling bath to cool. The sample jar is not placed directly into the cooling bath. An air gap of about 5. Figure 1. Apparatus for ASTM D Depending on the starting sample temperature and the expected cloud point, a series of cooling baths may be required.

Each bath is maintained at a successively lower temperature. This provides a measure of control over the cooling rate of the sample. Note that the cooling rate of this test is not specified and is not constant throughout the test. Bath temperature requirements are outlined in Table 1 and Figure 2 illustrates how a typical sample temperature varies over the course of the test.

BUS EIREANN 103 TIMETABLE PDF

Punto de enturbiamiento

WarningExtremely ammable. Denatured, cannot be made non- toxic. Vapor harmful. NOTEAll dimensions are in milllimetres. No further reproductions authorized. Procedure 8. Remove any moisture present by a method such as ltration through dry lintless lter paper until the oil is perfectly clear, but make such ltration at a temperature of at least 14C above the approximate cloud point.

F5D7230 4 PDF

Cloud point

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