|Test items||Meaning of test items|
|Flashing point (℃)||
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
|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.
|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.
|Remaining carbon powder among 10% of remaining substances (weight, %)||
Remaining carbon is a criterion for judging the combustion. Therefore, it is related to the amount of carbon occurring in the combustion
|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
|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.
|Smoking point (mm)||
Height of flame to burn without causing the soot as a crition for the degree of burning kerosene
|Corrosion of copper plate (50 ℃, 3 h)||
Indirectly measure the sulfur content or oxidized substances as a cause of corrosion
|Color (Say bolt color)||
Color has been determined to distinguish from the boiler kerosene (red color). Does not mean much according to the quality criterion
|Identifier additives (㎎/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