|Test items||Meaning of test items|
|Pour point (℃)||
The lowest temperature to maintain the flux status when being frozen
Viscosity increases when the temperature rapidly decreases in winter, and the wax content included in the fuel is emitted at the same time. Therefore, it blocks filter causing the fuel to be insufficiently supplied, lowering the spraying function, and badly influencing on the ignitionability and combustion.
Pour point is the feature that frequently becomes an issue in winter when transmitting the oil
|Flashing point (Tag, ℃)||
Temperature for instantaneously lighting on and off when approaching the flame to the oil by heating oil products
Criteria for judging the degree of danger in fire when saving, delivering, and using oil products
|Coefficient of viscosity (40 ℃, mm2/s)||
Related to the spraying feature of fuel. The lower the viscosity, the better the spraying feature is. It is also precisely sprayed accelerating heating and evaporation, reducing the delay of ignition, and hence improving combustion.
For the fuel sprayed by the spraying nozzle to be completely burnt, the efficacy of spraying shall be high. In addition, there is a need to maintain the viscosity in a certain level for this.
|Distillation characteristics (90% spilled temperature, ℃)||
Confirm the boiling point of the ingredients and identify rough components as well as volatility of oil products
If the 90% of spilled temperature is abnormally high, it means that there are oil components with high critical point that is inappropriate for complete combustion as it is evaporated from the wick. Therefore, there will be more of attachment of carbide on the wick with non-burnt oil.
In addition, if 90% spilled temperature is too low, the efficiency of the consumption of oil and fire power is low.
|Corrosion on copper plate (50 ℃, 3 h)||
Indirectly measure the sulfur content or oxidized substances as a cause of corrosion
|Water and precipitate (Volume %)||
If water is frozen below 0 ℃, fuel becomes oblique and frozen blocking the filter and causing problems on the devices using the fuel due to the corrosion of nozzle and fuel line/p>
|10% remaining carbon (weight %)||
Remaining carbon is the criterion for distinguishing the combustion and is related to the amount of carbon occurring in the carbonation room.
|Ash (weight, %)||
Left-over that is not burnt when completely burning the oil product
Metal becomes the oxide when it is burnt causing the abrasion on cylinder by producing deposit on the organization
|Sulfur content (weight, %)||
Cause the air pollution issues, deposit in the organization, and corrosion on the combustion system by SO2 occurring in the combustion
|Density @15 ℃ (kg/㎥)||
Density of oil product is used to measure the structure of hydrocarbon and also to calculate weight and content.
|Identifier additive (mg/L)||
In order to prevent the low priced oil priced from being mixed with relatively high priced oil products, identifier is added on the kerosene or byproduct fuel as a similar type of diesel