Duplex 2205 Capillary Tubing

Duplex 2205 capillary tubing is widely used in demanding environments where high strength, corrosion resistance, and precise dimensional control are required. Compared with standard austenitic stainless steels such as 316L, Duplex 2205 provides significantly improved resistance to chloride-induced stress corrosion cracking and higher mechanical strength.

Capillary tubing in small diameters requires strict control of outer diameter, inner diameter, and wall thickness to ensure consistent flow and pressure performance. Our Duplex 2205 capillary tubing is manufactured using advanced cold drawing and precision processing techniques, ensuring tight tolerances, smooth surface finish, and stable mechanical properties.

Duplex 2205 combines a balanced microstructure of austenite and ferrite, offering excellent resistance to pitting and crevice corrosion in chloride-rich environments such as seawater and offshore systems. This makes it particularly suitable for use in oil and gas, chemical processing, and subsea instrumentation applications.

In offshore operations, capillary tubing is often used for chemical injection lines, control systems, and monitoring equipment where reliability is critical. The enhanced strength of Duplex 2205 also allows for thinner wall designs without compromising pressure resistance, improving efficiency and reducing material costs.

Key Advantages

• Superior resistance to chloride-induced corrosion and stress cracking
• Higher strength compared with 316L stainless steel
• Tight dimensional tolerances for precision applications
• Excellent performance in offshore and subsea environments
• Suitable for high pressure and small diameter systems

Typical Specifications

• Material: Duplex 2205 (UNS S32205 / S31803)
• Outer Diameter: Custom small diameters available
• Wall Thickness: Precision controlled
• Form: Straight length or coil
• Surface: Annealed & Pickled / Bright Annealed

Applications

• Chemical injection capillary lines
• Offshore instrumentation systems
• Subsea control and monitoring lines
• Oil & gas precision tubing systems
• Laboratory and analytical equipment

Explore our related tubing solutions for high corrosion resistance and precision fluid control applications:

• 316L Capillary Tubing for Standard Instrumentation Applications
• Stainless Steel Capillary Tubing for General Precision Systems
• Duplex 2205 Control Line Tubing for Offshore and High Pressure Systems
• Duplex 2205 Coiled Tubing for Chemical Injection Lines
• Nickel Alloy Capillary Tubing for Extreme Corrosion Environments