Core Conclusion: Thick-walled large-diameter seamless steel pipes excel in superior high-pressure resistance, strong structural stability, adaptability to harsh conditions, and long-term durability. They are the core pipe choice for high-pressure, heavy-load, and complex working environments, with comprehensive performance far exceeding that of welded pipes and thin-walled pipes.

1. Outstanding Pressure-Bearing and Load-Resisting Capacity

• The thick-walled design (typically wall thickness ≥10mm, diameter ≥200mm) significantly enhances compressive strength, enabling it to withstand ultra-high pressure (up to several hundred MPa) and severe pressure fluctuations. It is suitable for scenarios such as high-pressure fluid transmission and pressure vessels.

• The weldless structure eliminates weak points like weld cracking and corrosion, boasting excellent impact resistance and fatigue resistance. It can withstand complex mechanical environments such as heavy loads and vibrations (e.g., construction machinery, subsea pipelines).

  
  

2. Excellent Structural Integrity and Stability

• The seamless forming process ensures uniform overall pipe structure and small wall thickness deviation. Stress distribution is even under load, preventing deformation or failure, making it suitable for long-term service in harsh conditions.

• The large-diameter feature meets the demand for high-flow transmission (e.g., oil and gas, water conservancy projects). Meanwhile, the thick wall enhances pipe rigidity, reducing the number of supporting structures and lowering installation and project costs.

  
  

3. Adaptability to Various Harsh Working Conditions

• It has a wide temperature resistance range (-200℃~600℃), capable of handling extreme temperature scenarios such as high-temperature steam and low-temperature media. It can also be adapted to corrosive environments like acids, alkalis, and seawater through anti-corrosion treatments (e.g., chrome plating, spraying).

• The weldless design reduces the risk of corrosive medium penetration. The sufficient space for thick-walled coatings/lining further extends corrosion resistance life, making it suitable for high-corrosion fields such as chemical industry and marine engineering.

  
  

4. Long-Term Durability and Low Maintenance

• Its service life can reach 20-50 years (far longer than ordinary welded pipes), requiring no frequent maintenance or replacement. This significantly reduces long-term operation and maintenance costs, especially for hard-to-inspect scenarios such as long-distance pipelines and deep-buried pipes.
• It has strong processing adaptability, allowing customization and forming through cutting, welding, bending, and other processes to meet the needs of special structural designs (e.g., large equipment casings, bridge supports).