WAX APPEARANCE POINT OF DISTILLATE FUELS: D3117
EXPLANATION
Wax appearance point is the temperature at which wax crystals begin to precipitate out of a fuel under specified cooling conditions. The presence of wax crystals in the fuel may restrict flow or plug the fuel filter. In critical fuel systems, wax appearance point may define the lower limits of acceptable operability. This test method is applicable to burner fuels, diesel fuels, and turbine engine fuels in the range from -26 to +2°C. It is applicable to dark colored oil if the stirrer can be seen under the illumination.
TEST SUMMARY
A specimen of distillate fuel is cooled under prescribed conditions while being stirred. The temperature at which wax first appears is considered the wax appearance point.
TEST PRECISION
Repeatability: 0.8° C
Reproducibility: 2.2° C
Bias has not been determined.
