What is the standard density of No. 0 diesel?
2 Answers
No. 0 diesel generally has a density between 0.8400--0.8600g/cm at the standard temperature of 20°C. Below are methods to identify the quality of No. 0 diesel: 1. Observe the color: Qualified No. 0 diesel is usually light yellow or yellow in color and appears clear and transparent. If the diesel appears cloudy, black, or colorless, it is likely unqualified. 2. Smell the odor: Qualified No. 0 diesel has a greasy or slightly pungent smell. If it has a foul odor, it is likely unqualified. 3. Check the density: Use a densitometer to measure. At room temperature, the specific gravity of No. 0 diesel is around 0.85. If the density is too high, it indicates the diesel has a high dry point, which can lead to incomplete combustion, black smoke, and carbon buildup in the engine during normal operation. If the density is too low, it suggests an excess of low-carbon components, which can cause knocking, poor acceleration, or an excessively low flash point during normal mechanical operation.
After driving for so many years, I'm quite familiar with the density standard for No. 0 diesel. According to the national standard GB19147, its density should be between 820 to 860 kilograms per cubic meter at 20°C. This density is crucial because it affects fuel consumption and engine performance. If the density is too high, say close to 860, the oil becomes too viscous, making cold starts difficult in winter and possibly causing failure to ignite. If the density is too low, around 820, the energy content is insufficient, leading to a surge in fuel consumption and more frequent, costly trips to the gas station during long journeys. I once tried fuel with abnormal density, and my car lacked power while burning more fuel—a big loss. The correct density range of 820-860 ensures smooth vehicle operation. When selecting fuel, check the gas station's quality inspection report to ensure the value falls within this range, saving money and protecting the engine. It's advisable to regularly check fuel quality to avoid damage from inferior fuel. Additionally, density is related to winter fluidity, with No. 0 diesel typically used in moderate seasons.
