Cloudpoint

The term cloud point ( CP; English: cloud point ) indicates a cold property of diesel fuel and heating oil. He is the temperature in degrees Celsius at which a bare liquid product under defined test conditions by the formation of wax crystals is cloudy or cloudy (Tyndall effect). The cloud point may be used for extra light heating oil according to DIN 51603-1 up to be 3 ° C. For diesel fuel, the cloud point is not specified according to EN 590. However, brands have an internal specification - ranging from 5 ° C to -9 ° C ( for explanation, see Filtrierbarkeitsgrenze (cold filter plugging point) ) - depending on the season.

The cloud point alone is not meaningful for the operational capability of heating oil at low temperatures, because the deterioration initially has no effect on the applicability. Only the combination of cloud point and Filtrierbarkeitsgrenze, the temperature at which a test filter clogged, is crucial for the assessment of the low-temperature properties.

A similar method for kerosene is below freezing (English: Freezing Point (ISO 3013 ) ) described.

The cloud point made ​​in accordance with EN 23015th

Distinction between

The cloud point is often referred to as the cloud point. Colliding with the so-called cloud point ( turbidity point) per ASTM D 4176, which characterizes the behavior of the dissolved water in the mixture. The term focal point collides with DIN 51798 ( benzene " freezing " ), or with DIN 51782 ( refrigerant / refrigeration). In addition, " crystallization point " in some sources - incorrectly - used interchangeably for Freezing Point. The DIN standard is called " cloud point ".