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Home > Duplex Steel > Duplex Steel Coil Tubing
Duplex Steel Coil Tubing is engineered to perform in extreme industrial environments where material failure is simply unacceptable. Designed with a powerful combination of high mechanical strength and exceptional corrosion resistance, this tubing delivers consistent reliability under the most demanding operating conditions. Its seamless coiled construction allows for long, continuous lengths, reducing the need for multiple joints and significantly lowering the risk of leakage or failure. Built to withstand high pressure, elevated temperatures, and aggressive chemicals, Duplex Steel Coil Tubing represents durability, precision, and operational confidence.
The Duplex Steel Coil Tubing features a unique dual-phase austenitic-ferritic structure, enriched with chromium, nickel, molybdenum, and nitrogen. This special composition grants it exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking, particularly in environments rich in chlorides or acids. On the mechanical side, the tubing boasts high tensile and yield strength, outstanding toughness, and excellent fatigue resistance. Its coiled design not only ensures flexibility but also maintains dimensional stability and pressure-handling capacity. The blend of corrosion resistance, mechanical strength, and adaptability makes Duplex Steel Coil Tubing a highly dependable choice for industrial applications that require compact and versatile piping solutions.
| 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 Samia 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.
Samia Pipes and Tubes, one of the largest suppliers of Duplex Steel Coil Tubing in the Tuniss, Tunisia. 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 Samia 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@samiapipes.com.
This type of tubing is extensively utilized in industries where corrosion resistance, mechanical strength, and flexibility are essential. In the oil and gas sector, it finds applications in flexible process lines, offshore platforms, and instrumentation systems. Chemical and petrochemical plants rely on it for transporting aggressive fluids and acids in space-efficient layouts. Power generation facilities use it in boilers, heat exchangers, and condensers. Moreover, it plays a crucial role in marine engineering, desalination plants, and various industrial process systems, providing efficient, space-saving piping solutions. Its combination of durability and corrosion resistance makes it a top choice for these demanding environments.
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