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With the continuous growth in China's industrial gas demand, technical requirements for pressure pipeline systems in air separation plants are increasing. Innovative applications of metal hoses and expansion joints have become critical breakthroughs in ensuring equipment safety and improving energy efficiency.
Technological Innovation: Performance Breakthroughs under Extreme Conditions
Air separation plants operate at temperatures ranging from -196°C to 300°C, posing severe challenges to conventional pipeline systems. The newly developed multi-layer stainless steel corrugated metal hoses feature vacuum insulation and corrugated compensation designs, increasing axial compensation capacity to ±30mm/m and vibration absorption efficiency by 45%.
Industry Standards: Comprehensive Safety Regulation Upgrades
The 2024 revised Technical Specifications for Cryogenic Pressure Pipeline Components mandates:
Expansion joints in liquid oxygen pipelines must be equipped with anti-static devices
Burst pressure of metal hoses must reach 8 times working pressure
100% non-destructive testing for all welds
Application Cases: Large-scale Air Separation Projects
At a 200,000 Nm³/h air separation project in Ningxia, the use of new hinge-type expansion joint assemblies successfully resolved cold shrinkage compensation challenges in -196°C liquid nitrogen pipelines, reducing system leakage rate to 0.02‰, 60% lower than conventional designs.
Market Trends: Intelligence and Sustainability Synergy
Industry data shows China's air separation metal hose market exceeded 1.8 billion RMB in 2024, with:
Smart monitoring products accounting for 35%
Recyclable metal composite material usage growing by 120%
