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Successful Development of 25% Chromium P110-Grade Extra-Heavy Wall Pipe by the Company
LH Metals Achieves Breakthrough in Heavy-Wall Super Duplex Steel Pipe Production
LH Metals has successfully developed 25Cr-P110 grade extra-heavy wall pipes (exceeding 30mm thickness), marking a significant advancement in super duplex steel manufacturing capabilities. This achievement fills the company's technical gap in thick-wall pipe production and represents a major stride in China's specialty steel sector.
Technical Highlights:
- Material Innovation
The 25% chromium super duplex steel (UNS S32750) demonstrates pitting resistance equivalent (PRE) >40, meeting NACE MR0175 standards for harsh offshore oil/gas environments.
- Process Breakthroughs
- Application Significance
Enables safer deepwater pipeline systems with 30% greater pressure tolerance compared to conventional P110 pipes.
Development Challenges Overcome:
- Initial production hurdles included:
- Unpredictable microstructure evolution in thick sections
- Stress concentration during cold-rolling of >30mm walls
- Maintaining corrosion resistance across entire pipe circumference
- The R&D team's systematic approach involved:
- Phase balance optimization through precise thermal-mechanical processing
- Novel deformation sequence reducing edge cracking risks
- Real-time monitoring with AI-assisted process control
This milestone reinforces LH Metals' position as an innovator in high-performance steel solutions, supporting global energy infrastructure development.