density - is the weight of the substance, which is in the unit volume.The unit of measurement is the density (kg / m³) kilograms per cubic meter.From the group of the chemical composition depends on the density of the fuel.The smallest have a density of paraffin carbohydrates and the largest - aromatic and naphthenic carbohydrates.Fractional composition of oil has an impact on the density.The greater the density of fractions of fuel (oil), the higher the temperature of boiling regimes.In practice face dimensionless.This relative density which is the ratio of the density of the oil (fuel) at a certain temperature to the density of water taken in the same amount, at a temperature of four degrees Celsius.At 4 ° C the density of water is 1000 kg / m³.The relative density is determined at 20 ° C.
instrument that measures the density of the oil, called a hydrometer.
order to measure the density of a liquid in a container of oil hydrometer placed so that it is floating freely there.On a scale hydrometer shoot densities.Density can also be calculated using the formula: weight in kilograms divided by the volume in liters.
Accordingly, knowing the volume and hydrometer hydrometer to determine the density of oil, to determine the tonnage of oil can easily by multiplying density by volume.
Most often the density of petroleum products (diesel oil, machine oil, etc..) Is carried out using a hydrometer to plotnometrov or petroleum products.Compared with traditional instruments that determine the density of the oil (hydrometers), it has a lot of advantages of any plotnometr.In a very narrow range, you can measure the density of the hydrometer.If the liquid to be measured for each buy a hydrometer, you are, on the one hand, be able to save on the purchase of electronic densitometer, however, on the other hand, will have to buy new instead crashed hydrometers.But if you buy plotnometr, it will be more convenient means of measuring the density, you can use it for many years.Be sure to consider when buying plotnometra that any device of this kind, in addition to the laboratory, must necessarily be certified for explosion protection, because the measurements are carried out in hazardous areas.
Measuring the density of petroleum products is necessary in order to evaluate the fuel quality and to determine its amount.Quantification of mass calculation is oil by measuring its temperature, density and level (to calculate the volume).
calculated mass is because of these parameters it is only when the temperature changes will invariably change as the volume (level), and the density of the oil.
Lubricate all moving parts of the engine allows the engine oil.It covers the details of a protective film, which reduces friction and wear, so that the wheels more power is transmitted.It also protects against dirt, corrosion and harmful deposits engine parts.The oil is able to refresh the engine due to the fact that combustion takes away from excessive heat, passing it down to the sump.
mineral oils are simple oils used by man for decades.Produce them by purification of the crude oil, then the oil is mixed with various additives to prevent the formation of sludge, drugs that prevent wear and viscosity improvers.Mineral oils are relatively cheap and are averages.
in the laboratory produce synthetic oil.They are more expensive and get them through complex chemical processes.
semi-synthetic oils are a mixture of the first two.They average ratio of 20-30% synthetic oil and 70-80% mineral.
