We are looking to purchase heavy fuel oil (residue oil) with consistent quality, suitable for industrial, marine, and power plant use. The total required amount is 10,000 tons, with delivery arranged on CIF terms to Angola. We require suppliers who can provide detailed product specifications, quality certifications, and confirmation of availability. Offers should include pricing, payment terms, lead times, and shipping arrangements. We are interested in suppliers who can ensure consistent product quality and timely delivery. Flexibility in order quantities and the ability to provide documentation for evaluation is preferred. All proposals should be professionally documented, transparent, and include any relevant compliance or export information. Heavy fuel oil, also known as residue oil, is a thick, viscous petroleum product obtained from the distillation of crude oil. It is primarily used as a fuel for industrial boilers, power plants, ships, and large-scale heating applications. Heavy fuel oil is valued for its high energy content and cost-effectiveness compared to lighter fuels, making it an important component in the global energy and shipping sectors. Heavy fuel oil is classified based on its viscosity, density, and sulfur content. Common grades include high sulfur residual fuel oil and low sulfur marine fuel, which comply with environmental regulations for sulfur emissions. Residual oils are heavier than diesel or kerosene and require preheating before use. Their chemical composition can vary depending on the crude oil source and refining process. The main producing regions for heavy fuel oil include the Middle East, North America, Europe, and parts of Asia. Major exporters include Saudi Arabia, the United States, India, and the United Arab Emirates. Other notable suppliers include Brazil, South Korea, and Nigeria. These regions have large refineries and infrastructure capable of producing and distributing heavy residual fuels for industrial and maritime use. Heavy fuel oil is transported using tanker ships, pipelines, and rail, often in heated storage tanks to maintain flow properties. It is typically stored and handled with care due to its high viscosity and potential environmental impact. Proper transportation and storage practices are essential to prevent spills, contamination, and degradation of fuel quality. Leading global suppliers of heavy fuel oil include ExxonMobil, Chevron, Saudi Aramco, TotalEnergies, and Shell. These companies supply residue oils to industrial, maritime, and power generation markets worldwide. They emphasize product quality, compliance with environmental standards, and reliable delivery to meet global demand. Standard specifications for heavy fuel oil typically include viscosity, density, sulfur content, water content, and ash content. High-quality residue oil maintains consistent properties suitable for combustion in engines, boilers, and furnaces. Compliance with international fuel standards, such as ISO or MARPOL regulations, ensures safe and efficient use in industrial and marine applications.