Standard Test Method for Wax Appearance Temperature and Wax Disappearance Temperature of Petroleum Products and Liquid Fuels

Importancia y uso:

5.1 The wax appearance temperature of petroleum products and liquid fuels is an indicator of the lowest temperature of their utility for certain applications. Wax crystals of sufficient quantity can plug filters or impede flow in some fuel systems.

5.2 The wax disappearance temperature of petroleum products and liquid fuels is an indicator of the warmest temperature to remove thermal history. Wax crystals of sufficient quantity can plug filters or impede flow in some fuel systems.

5.3 NIR light scattering technology is useful for recognition of wax crystal formation in dark and opaque fuels, and the cloud point in transparent fuels.

5.4 The wax appearance temperature is an earlier indicator of wax crystal formation than pour point and has better resolution than pour point.

5.5 This test method can determine the temperature of the test specimen at which wax crystals have formed sufficiently to be observed with a resolution of 0.1 °C.

Subcomité:

D02.07

Volúmen:

05.05

Número ICS:

75.160.20 (Liquid fuels)

Palabras clave:

cloud point; constant cooling rate; crude oil; marine fuel; Peltier; petroleum products; residual fuel; thermoelectric; wax appearance temperature; wax crystals; wax disappearance temperature;