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5. Freezing point (cloud point, set point, pour point and creep point)
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Point trouble
As the temperature drops, an opacity appears, due to kerosene crystallization, before the fluid (e.g. mineral-based) sets. This determines the cloud point.
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Freezing point
This is the temperature below which a cooled fluid, under prescribed test conditions, ceases to flow.
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Flow point
The pour point is the lowest temperature at which the fluid still flows when cooled, without agitation, under standardized conditions.
The natural drainage points for mineral oils vary greatly depending on their origin:
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Freezing point (cloud point, set point, pour point and creep point)
Flash point, fire point. Auto-ignition temperature
References
Standardization. Specifications
Association française de normalisation AFNOR
http://www. boutique.afnor.fr/
- Hydraulic transmissions – Fluids – Measurement of mineral oil filterability. Classification number : E48-690 - NF E 48-690 - 12-90
- Liquid petroleum products – Vapour pressure – Part 2: Determination of absolute vapour pressure (AVP)...
Hydraulic fluid analysis methods
Table 1 shows the equivalences between the various standards recommended by European and American standards bodies.
The numbers in the table refer to the comments below.
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