- sales@liampipes.us
- Houston , USA
Home > Duplex Steel > Duplex Steel Coil Tubing
Liam Pipes and Tubes is a well-respected manufacturer and supplier of top-notch Duplex Steel Coil Tubing, located in Houston, USA. We focus on providing precision-engineered coil tubing solutions that boast impressive strength, corrosion resistance, and fatigue performance, even in tough conditions. Our Duplex grades, such as UNS S31803 and S32205, merge the advantages of austenitic and ferritic stainless steels, ensuring enhanced mechanical stability and a long service life. Built to meet ASTM and ASME standards, our coil tubing is commonly used in offshore, chemical, petrochemical, and heat exchanger applications. We also offer global delivery and can customize specifications to fit your project needs.
Duplex Steel Coil Tubing consists of about 22–23% chromium, 4.5–6.5% nickel, and 2.5–3.5% molybdenum, with the rest being iron and trace elements like nitrogen and manganese. This dual-phase structure provides high tensile strength (620–850 MPa), yield strength exceeding 450 MPa, and exceptional resistance to stress corrosion cracking, pitting, and crevice corrosion. Duplex coil tubing performs excellently in chloride-rich and high-pressure environments. Its balanced microstructure ensures better weldability, thermal conductivity, and fatigue strength compared to traditional stainless steels, making it perfect for dynamic and corrosive operating conditions.
| Specifications | ASTM A790 / ASME SA790, ASTM A789 / ASME SA A789 |
| Standard | ASTM, ASME and API |
| Coil Tubes Sizes | 1 / 2″ NB – 8″ NB |
| Duplex Tubes Sizes | 6″ NB – 24″ NB |
| Outer Diameter | 6.0-630mm |
| Thickness | 0.3mm – 50 mm |
| Schedule | SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS |
| Types | Heat Exchanger/ Instrumentation/ Precision Tubing/ Long Coiled Tubing/ Multi-core Coiled |
| Duplex | Coiled |
|---|---|
| Ni | 4.50 – 6.50 |
| Fe | 63.72 min |
| Cr | 22.0 – 23.0 |
| C | 0.030 max |
| Si | 1.00 max |
| Mn | 2.00 max |
| P | 0.030 max |
| S | 0.020 max |
| N | 0.14 – 0.20 |
| Grade | S31803 |
| Density (g/cm 3) | 7.805 |
| Density (lb/in 3) | 0.285 |
| Melting Point (°C) | 1420 – 1465 |
| Melting Point (°F) | 2588 – 2669 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Choosing Duplex Steel Coil Tubing from Liam Pipes and Tubes ensures superior quality and durability, offering outstanding corrosion resistance and high strength. Our dedication to delivering exceptional service and reliable products guarantees customer satisfaction across a wide range of industrial applications. With our expertise in Duplex steel solutions, you can trust us to provide a top-tier, customized piping solution that meets your specific requirements.
Liam Pipes and Tubes, one of the largest suppliers of Duplex Steel Coil Tubing in the Houston s, USA. Offers a wide range of high-quality pipes and tubes designed for various industrial applications. Their extensive inventory and dedication to exceptional service make them a trusted choice for Duplex steel products in the region, delivering reliable solutions to meet diverse project requirements.
Yes, we provide custom sizes for Duplex Steel Coil Tubing to meet your specific requirements. At Liam Pipes and Tubes, our team is dedicated to delivering tailored solutions for all your piping and tubing needs. For more information, please contact us at sales@liampipes.us.
Duplex Steel Coil Tubing is extensively utilized in applications that demand high mechanical strength, corrosion resistance, and the ability to handle pressure. In the oil and gas sector, it’s perfect for downhole tubing, chemical injection lines, and subsea umbilicals. In chemical and petrochemical facilities, it finds its place in instrumentation tubing, heat exchangers, and process control systems. The pulp and paper, marine, and power generation industries also rely on it for its durability and performance.
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