The stringent demands of the petrochemical industry
As an important pillar of the national economy, the petrochemical industry involves many complex and harsh working conditions in its production process. In the process of oil refining and chemical product synthesis, the pipeline system needs to withstand extreme environments such as high temperature, high pressure and strong corrosion.
In a high temperature environment, the medium temperature in the pipeline is often as high as hundreds of degrees Celsius, which places extremely high demands on the thermal stability of the pipeline material. If the material cannot withstand high temperatures, it may cause the pipeline to soften, deform or even rupture, leading to serious safety accidents. High pressure is also a major challenge facing petrochemical pipelines. The pipeline needs to withstand huge internal pressure, and leakage or bursting may occur if not handled with care.
In addition, various chemical substances used in petrochemical production, such as acids, alkalis, and salts, are extremely corrosive and will continuously corrode pipeline materials. Ordinary materials will be corroded and penetrated in such a highly corrosive environment in a short period of time, causing the pipeline to lose its ability to transport the medium, seriously affecting the continuity of production. Therefore, the petrochemical industry urgently needs a high-performance pipeline material to meet its complex and demanding working conditions.
Unique advantages of seamless steel tubes
1. Excellent stress resistance
Seamless tubes are made of high-quality steel and processed by special technology. They have a dense and uniform structure, giving them excellent compressive resistance. Generally speaking, the compressive strength of seamless steel tubes can reach 450-600 MPa, which is much higher than that of ordinary welded steel pipes.
In the high-pressure environment of petrochemical industry, such as the connecting pipes of equipment such as distillation towers and hydrogenation reactors in the oil refining process, and long-distance natural gas pipelines, seamless steel tubes can stably withstand huge internal pressure, ensure the safe and continuous transportation of the medium, and effectively reduce the risk of pipeline rupture and leakage due to excessive pressure.
2. Excellent corrosion resistance
In the production of seamless steel pipes, steel containing alloy elements such as chromium, nickel, and molybdenum is often used, or special surface treatment processes such as hot-dip galvanizing and anti-corrosion coating are used to make them have excellent corrosion resistance. When in contact with corrosive substances such as hydrogen sulfide and carbon dioxide contained in petroleum and natural gas, as well as chemical media such as acids, alkalis, and salts in chemical production, seamless steel pipes can form a dense oxide film or protective layer on the surface of the pipe, preventing the corrosive medium from further eroding the inside of the pipe, greatly extending the service life of the pipeline.
3. Excellent processing performance
Seamless steel pipes have good ductility and plasticity, and are easy to process. Through cold drawing, cold rolling, hot rolling, hot expansion and other processes, seamless steel pipes can be made into pipe fittings of different diameters, wall thicknesses and shapes, such as elbows, tees, reducers, etc., to meet the complex pipeline installation needs in petrochemical projects. In the construction of large-scale petrochemical plants, seamless steel pipes can be flexibly processed and connected according to different process flows and layout requirements to ensure accurate installation and efficient operation of the pipeline system.
Diverse applications of seamless steel tubes
1. Transportation pipeline
In the petrochemical industry, seamless steel tubes are ideal for oil and gas transportation. Their high strength and excellent sealing performance enable them to withstand the huge pressure during long-distance and large-diameter transportation, ensuring stable and safe transportation of energy. From oil field wellheads to refineries and to every corner of the city, seamless steel pipes have built a solid network for energy transportation, providing continuous power support for industrial production and residents' lives.
2. Cracking equipment
Oil cracking is a key link in oil processing and needs to be carried out under high temperature and high pressure conditions. Seamless steel pipes have become the best choice for cracking equipment pipelines due to their high temperature and high pressure resistance. For example, in the core equipment such as the atmospheric and vacuum distillation unit and catalytic cracking unit of the refinery, seamless steel pipes can stably transport high-temperature oil and gas mixtures, meet the stringent requirements for pipeline materials in the oil cracking process, and ensure the efficient progress of the cracking reaction.
3. Storage facilities
Seamless steel pipes are also commonly used in the manufacture of oil storage tanks. Their good sealing properties can effectively prevent oil leakage, avoid environmental pollution and waste of resources. At the same time, the high strength and corrosion resistance of seamless steel pipes can withstand chemical erosion during long-term storage of oil, ensuring the safety and reliability of storage facilities and reducing maintenance costs and potential risks.
Read more：Seamless Steel Tube: Both Economic and Environmental Protection
