GB9948 No. 20 seamless steel pipe for oil cracking

In the modern petrochemical industry, the use of seamless steel pipes is increasingly widespread. Among these, the No. 20 seamless steel pipe for petroleum cracking stands out with its excellent performance and broad application fields. This article explores the material characteristics, production process, and application areas of the No. 20 seamless steel pipe for petroleum cracking.

Implementation Standard

The No. 20 seamless steel pipe for petroleum cracking adheres to the GB/T 9948 standard for seamless steel pipes. It must also comply with the TSG D7002 pressure pipeline component type test rules.

Mechanical Properties: Tensile strength of 410~530 MPa, yield strength of ≥245 MPa, and elongation after fracture of ≥20.

Production Method: Hot rolling and heat treatment.

Material Characteristics

The No. 20 seamless steel pipe is crafted from high-quality carbon structural steel, which undergoes precise smelting, rolling, and other processes. This results in:

High Strength and Toughness: Ensures durability under harsh conditions.

Good Corrosion Resistance: Maintains stability under high temperatures, high pressure, and hydrogen environments.

Special Surface Treatment: Enhances corrosion resistance, maintaining pipeline integrity and safety over long-term use.

Production Process

The production of No. 20 seamless steel pipe involves advanced technologies to ensure superior performance:

Hot Rolling or Cold Rolling: Ensures smooth inner and outer walls, free from defects like cracks and bubbles.

Precise Sizing and Heat Treatment: Ensures uniform wall thickness and accurate dimensions.

Strict Quality Inspection: Guarantees that the steel pipe meets relevant standards and requirements.

Application Fields

The No. 20 seamless steel pipe for petroleum cracking is extensively used in the petrochemical industry, particularly for fluid transportation in challenging environments such as high temperatures, high pressures, and hydrogen conditions. Its applications include:

Petroleum Cracking Units: Withstands extreme conditions to ensure stable fluid transport and improved production efficiency.

Natural Gas Transportation, Marine Engineering, and Mining: Meets the corrosion resistance and strength requirements.

Boilers and Heat Exchangers: Handles high temperature and pressure environments to ensure normal equipment operation.

Chemical and Electric Power Industries: Beneficial due to its excellent corrosion resistance.

Future Prospects

With ongoing technological advancements, the performance and application fields of the No. 20 seamless steel pipe for petroleum cracking are expected to expand. Future developments may include:

Advanced Materials and Processes: Further improvements in strength, corrosion resistance, and service life.

New Energy and Environmental Protection Fields: Expanded applications in rapidly developing sectors.

Conclusion

The No. 20 seamless steel pipe for petroleum cracking has become a crucial material in the modern petrochemical industry, thanks to its exceptional performance and wide-ranging applications. As technology progresses and application areas broaden, this seamless steel pipe will continue to play an essential role, supporting the development of the petrochemical industry and beyond.