Definition and purpose:
Pipeline pipe refers to a pipeline that connects pumps, valves, or control systems, used for transporting liquids, gases, or solid powders.
Pipeline pipes include seamless and welded pipes, with flat ends, threaded ends, and socket ends at the pipe ends; The connection methods include end welding, clamp connection, socket connection, etc.
Pipeline pipes are used for the transportation of gas, water, and oil in the petroleum and natural gas industry.
Materials and Technical Specifications:
The main materials of pipeline pipes include L245, L290, L360, L415, L480, GR B. X42, X46, X56, X65, X70, X80, X100 and other steel grades.
The mechanical properties of pipeline pipes vary according to different standards and product grades. For example, pipeline pipes under the API 5L GB/T9711.2 standard have clear requirements for yield strength and tensile strength.
The chemical composition of pipeline pipes is strictly limited, with clear ranges for the content of elements such as carbon, sulfur, and phosphorus.
Technological progress:
China has made progress in basic research on the application of high-grade pipeline steel and steel pipes, including the manufacturing technology of X70/X80 series hot-rolled coils and large-diameter thick walled spiral submerged arc welded pipes.
The research has solved key technical problems of X90~X120 high-grade pipeline steel and steel pipes, such as yield strength ratio, strain aging, low-temperature toughness, etc.
Classification and Characteristics:
Pipeline pipes can be classified according to their different tempering temperatures, including low-temperature tempering, medium temperature tempering, and high-temperature tempering. Each tempering treatment has its specific purpose and application.
Pipeline pipes have the characteristics of corrosion resistance, low temperature resistance, and cold weather resistance.
Application:
Pipeline pipes are widely used in major transportation projects such as the West East Gas Pipeline.