In the petroleum and chemical industries, seamless steel pipes play a vital role. Especially in high temperature and high pressure environments, the material and performance requirements for seamless steel pipes are even more stringent. Among them, 12Cr9MoI seamless steel pipes for petroleum cracking have become the industry leader with their unique performance and wide application fields.
First, the industrial performance of 12Cr9MoI seamless steel pipe for petroleum cracking
1. The product implementation of 12Cr9MoI seamless steel pipe: GB/T9948 seamless steel pipe for petroleum cracking
2. The chemical composition of 12Cr9MoI seamless steel pipe: carbon; ≤0.15, silicon: 0.25~1.0, manganese: 0.30~0.60, chromium: 8.0~10, molybdenum: 0.90~1.10, nickel: ≤0.60, copper: ≤0.20, phosphorus: not more than 0.025, sulfur: not more than 0.015 12Cr9MoI and 12Cr9MoNT chemical composition is basically the same.
3. The state of 12Cr9MoI seamless steel pipe: fully annealed or isothermal annealed. Tensile strength 460~640MPa, lower yield not less than 210, elongation after fracture not less than 20, longitudinal impact energy not less than 40, Brinell hardness not greater than 179HBW
4. The products of 12Cr9MoI seamless steel pipes shall meet the requirements of TSG D700 pressure pipe component type test specifications.
5. Product specifications of 12Cr9MoI seamless steel pipes: outer diameter 21.3mm~762mm, wall thickness: 2.0~140mm
6. Production methods of 12Cr9MoI seamless steel pipes: hot rolling, cold drawing, hot expansion, delivery status: heat treatment.
12Cr9MoI seamless steel pipes for petroleum cracking are widely used in key parts such as petroleum cracking furnace tubes, refining units, cracking units, hydrogen units, and heat exchangers due to their excellent corrosion resistance, high temperature stability, and good mechanical properties. In this equipment, seamless steel pipes not only carry high temperature and high pressure media but also withstand complex thermal stress, mechanical stress, and chemical corrosion, so their materials and processes are extremely demanding.
The manufacturing process of 12Cr9MoI seamless steel pipes is very strict. First, high-quality Cr-Mo alloy steel is selected as raw material, and after precise smelting and continuous casting processes, the purity and uniformity of the steel are ensured. Subsequently, a series of processes such as hot rolling, perforation, annealing, pickling, etc. are used to form seamless steel pipes with excellent performance. During the manufacturing process, the chemical composition, heat treatment process, and dimensional accuracy are strictly controlled to ensure that each steel pipe meets the standards and requirements.
In terms of performance, 12Cr9MoI seamless steel pipes perform well. Its tensile strength and yield strength are higher than those of ordinary steel pipes, and its elongation after fracture and impact absorption energy also show good toughness. In addition, the steel pipe also has good oxidation corrosion resistance and organizational stability and can operate stably for a long time under high temperatures and high pressure environments.
It is precisely because of these excellent properties that 12Cr9MoI seamless steel pipes have been widely used in the petroleum and chemical industries. In the process of oil cracking, the steel pipe can withstand high temperature and high pressure oil and gas mixture, maintain stable performance, and ensure the safe operation of the equipment. At the same time, in refining and cracking units, the steel pipe also plays a key role in ensuring the quality and output of the product.
In addition to the petroleum and chemical industry, 12Cr9MoI seamless steel pipe can also be used in other high temperature and high pressure environments, such as electricity, boilers, nuclear power, and other fields. In these fields, the steel pipe also performs well, providing a reliable guarantee for the stable operation of the equipment.
With the continuous development of the petroleum and chemical industry, the performance requirements for seamless steel pipes are also increasing. In the future, 12Cr9MoI seamless steel pipe will continue to optimize the manufacturing process and improve product quality to meet more stringent application requirements. At the same time, with the continuous emergence of new materials and new technologies, the application field of seamless steel pipes will also be further expanded.
In general, 12Cr9MoI seamless steel pipe for petroleum cracking plays an irreplaceable role in the petroleum and chemical industry with its excellent performance and wide application fields. With the continuous advancement of technology and the expansion of application fields, the steel pipe will continue to play its important role and provide strong support for the development of the industry.
Post time: May-09-2025