江苏省苏州市市场监管局公布2025年车用汽油产品质量市级监督抽查情况公告（第81期）

Product Overview and Industry Distribution - Automotive gasoline is a crucial petroleum product, derived from the refining of light petroleum fractions, characterized as a transparent or semi-transparent, volatile, and flammable hydrocarbon mixture [3] - The main components of gasoline include C5 to C12 aliphatic hydrocarbons and cycloalkanes, with a high octane rating indicating better anti-knock performance, suitable for high-compression engines [3] - The demand for automotive gasoline has significantly increased due to rapid economic development and the growth of the automotive industry in China, posing new challenges for gasoline quality [3] Industry Overview - The East China, Northeast, and Northwest regions are the primary production areas for refined oil in China, accounting for approximately 70% of the national total supply [4] - Major refining enterprises in East China include Jinling Petrochemical, Yangzi Petrochemical, and others, while Northeast and Northwest regions are home to major PetroChina refineries, contributing 21.1% and 15.9% of the national output, respectively [4] - In Jiangsu, key gasoline production companies include Jinling Petrochemical, Yangzi Petrochemical, and others, primarily located in cities like Nanjing and Taizhou [4] Inspection Basis and Items - The main inspection standard for automotive gasoline quality is GB17930-2016 [5] - Key inspection items include octane rating, density, lead content, distillation range, gum content, sulfur content, copper strip corrosion, mechanical impurities and moisture, benzene content, aromatic content, olefin content, and alcohols and ethers [5] Supervision and Inspection Results - A total of 100 batches of automotive gasoline were planned for inspection, all sourced from the circulation field, with a 0% non-conformity rate indicating overall good quality [6] - Sulfur content in gasoline is a significant impurity that can lead to environmental pollution and engine corrosion, affecting the lifespan of equipment [6] - Copper strip corrosion tests are conducted to assess the corrosive effects of gasoline on copper, with national standards requiring corrosion levels not exceeding grade 1 [7] - The density of gasoline is critical, as it affects engine performance; too low a density can cause knocking, while too high can lead to incomplete combustion and carbon buildup [7]