Selection of chemical dosing units for crude oil transport pipelines

Chemical dosing in crude oil transportation pipelines is intended to prevent issues such as corrosion, scaling, emulsification, and deposition that can occur during transport; these problems affect the safety, efficiency of the pipelines, as well as the quality of the crude oil. Therefore, chemical dosing in pipelines is an important step, which usually involves adding corrosion inhibitors, scale inhibitors, descaling agents, dehydrating agents, and antibacterial agents. The selection of a chemical dosing head (also known as a dosing unit or dosing pump) should be based on the following factors: 1. **Crude oil properties**: Appropriate chemicals are chosen according to the characteristics of the crude oil, such as its acidity, sulfur content, viscosity, and water content. 2. **Pipeline conditions**: Factors such as the material, diameter, length, flow rate, and temperature of the pipeline all affect the selection of the dosing head. 3. **Location of chemical dosing points**: Typically, chemical dosing points are located at crude oil production wells, gathering stations, or oil transfer pump stations. The installation location of the chemical dosing head should facilitate operation and maintenance, as well as ensure thorough mixing of the chemicals. 4. **Chemical type**: Chemical agents with different functions possess distinct physical and chemical properties, requiring the use of dosing equipment that is suitable for them. 5. **Dosage amount**: The capacity and flow rate range of the dosing equipment must meet the requirements of the actual dosage amount, including both continuous and intermittent dosing needs. 6. **Environmental factors**: Taking into account the operating environment (such as temperature, humidity, and flammability or explosiveness), the material and design of the dosing head must meet the corresponding environmental requirements. Regarding relevant specifications or technical documents, the regulations and standards in the Chinese mainland may include, but are not limited to, the following: GB (national standards), SY/T (petroleum industry standards) and other Chinese **standards or industry standards ； - API (American Petroleum Institute) standards ； - NACE (International Corrosion Engineers Society) standards. When it comes to selecting the chemical dosing unit, it may be necessary to consult standard documents related to the design, installation, and operation of equipment in the petroleum industry; at the same time, reference to the technical documentation provided by specific chemical suppliers as well as data on the performance of those chemicals may also be required. Before designing and selecting the equipment, it is generally recommended to consult with professional chemical service companies or equipment suppliers to ensure that the dosing equipment best suited to local conditions and the characteristics of the crude oil is chosen. .

Are there any specific guidelines? Could you share it?

Standards such as SY5317, GB/T 27867, and ISO3171 can be referred to. It is necessary to determine factors such as process conditions, filling methods, and properties of the medium. If you need further technical consultation, feel free to leave a message.