- sales@ojaspipesandtubes.co.in
- Kolkata, Kolkata
Home > Duplex Steel > Duplex Steel Pipe
Ojas Pipes and Tubes stands out as a top manufacturer and supplier of high-performance Duplex Steel Pipes, proudly based in Kolkata, India. Crafted from top-notch duplex stainless steel grades like UNS S31803 and S32205, these pipes deliver an impressive mix of strength, corrosion resistance, and durability. Thanks to their unique austenitic-ferritic microstructure, Duplex Steel Pipes excel in tough environments with high chloride levels and mechanical stress. Ojas ensures these pipes meet global standards, providing precise dimensions, excellent weldability, and a long lifespan. They find applications across various industries, including oil & gas, marine, chemical processing, and power generation.
Duplex Steel Pipes are made up of about 22% Chromium, 5–6.5% Nickel, 3% Molybdenum, and a touch of Nitrogen, creating a dual-phase structure that boosts both mechanical strength and corrosion resistance. These pipes boast impressive tensile strength (~620 MPa), yield strength (~450 MPa), and an elongation of around 25%. They are highly resistant to pitting, crevice corrosion, and stress corrosion cracking caused by chlorides. With superior strength compared to austenitic stainless steels and good impact toughness, Duplex Steel Pipes are well-suited for high-pressure and corrosive environments, making them ideal for critical industrial applications that demand reliability.
| Standard | ASTM A790 / ASME SA790 UNS S31803, S32205, S32550, S32750, S32760 |
| Materials | ASTM A815 – UNS S31803 |
| Size | 1/2″NB TO 12 “NB IN |
| Seamless Pipes & Tubes Sizes | 1/2” NB – 8” NB |
| Welded Pipes & Tubes Sizes | 6” NB – 24” NB |
| Thickness | 0.5-45mm |
| Outer Diameter | 6.0-630mm |
| Dimensions | OD(6.0-630)*WT(0.5-45)mm |
| Schedule | SCH20, SCH30, SCH40, STD, SCH80 |
| Type | Welded / Fabricated / Seamless |
| Length | Single Random, Double Random & Cut Length. |
| Ni | Cr | Mo | Mn | Si | C | N | S | P | Fe | |
| MIN | 4.5 | 22.0 | 3.0 | – | – | – | 0.14 | – | – | – |
| MAX | 6.5 | 23.0 | 3.5 | 2.0 | 1.0 | 0.03 | 0.2 | 0.02 | 0.03 | Balance |
| S31803 / S32205 | Density | Melting Point | Yield Strength (0.2%Offset) | Tensile Strength | Elongation |
| 7.8 g/cm3 | 1350 °C (2460 °F) | Psi – 80000 , MPa – 550 | Psi – 116000 , MPa – 800 | 15 % |
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 Pipes from Ojas Pipes and Tubes ensures high quality and durability, as these pipes offer excellent corrosion resistance and strength. Our commitment to exceptional service and reliable delivery guarantees customer satisfaction across various industrial applications. Our expertise in stainless steel products ensures you receive a top-tier solution tailored to your needs.
Ojas Pipes and Tubes, one of the largest suppliers of Duplex Steel Pipes in Kolkata, India, offers a comprehensive range of high-quality pipes and tubes suitable for various industrial applications. Their extensive inventory and commitment to exceptional service make them a go-to choice for stainless steel products in the region.
Yes, we offer custom sizes for Duplex Steel Pipes to meet your specific requirements. Our team at Ojas Pipes and Tubes is committed to providing tailored solutions for all your Piping & tubing needs. For more details, contact us at sales@ojaspipesandtubes.co.in.
| Nominal pipe size up to 4 = ± 0.79 mm | 5 thru 8 = + 1.58 mm / – 0.79 mm 10 thru 18 = + 2.37 mm / – 0.79 mm | 20 thru 24 = + 3.18 mm / – 0.79 mm | ||
| Wall Thickness All Diameters = – 12.5% + tolerance not specified | Length + 6.40 mm / – 0 mm | Weight Weight = + 10% / – 1.5% |
| Wall | Sizes ( O.D.) |
|---|---|
| .010 | 1/16″ , 1/8″ , 3/16″ |
| .020 | 1/16″ , 1/8″ , 3/16″ , 1/4″ , 5/16″ , 3/8″ |
| .012 | 1/8″ |
| .016 | 1/8″ , 3/16″ |
| .028 | 1/8″ , 3/16″ , 1/4″ , 5/16″ , 3/8″ , 1/2″ , 3/4″ , 1″ , 1 1/2″ , 2″ |
| .035 | 1/8″ , 3/16″ , 1/4″ , 5/16″ , 3/8″ , 7/16″ , 1/2″ , 16″ , 5/8″ , 3/4″ , 7/8″ , 1″ , 1 1/4″ , 1 1/2″ , 1 5/8″ , 2″ , 2 1/4″ |
| .049 | 3/16″ , 1/4″ , 5/16″ , 3/8″ , 1/2″ , 16″ , 5/8″ , 3/4″ , 7/8″ , 1″ , 1 1/8″ , 1 1/4″ , 1 1/2″ , 1 5/8″ , 2″ , 2 1/4″ |
| .065 | 1/4″ , 5/16″ , 3/8″ , 1/2″ , 16″ , 5/8″ , 3/4″ , 7/8″ , 1″ , 1 1/4″ , 1 1/2″ , 1 5/8″ , 1 3/4″ , 2″ , 2 1/2″ , 3″ |
| .083 | 1/4″ , 3/8″ , 1/2″ , 5/8″ , 3/4″ , 7/8″ , 1″ , 1 1/4″ , 1 1/2″ , 1 5/8″ , 1 7/8″ , 2″ , 2 1/2″ ,3″ |
| .095 | 1/2″ , 5/8″ , 1″ , 1 1/4″ , 1 1/2″ , 2″ |
| .109 | 1/2″ , 3/4″ , 1″ , 1 1/4″ , 1 1/2″ , 2″ |
| .120 | 1/2″ , 5/8″ , 3/4″ , 7/8″ , 1″ , 1 1/4″ , 1 1/2″ , 2″ , 2 1/4″ , 2 1/2″ , 3″ |
| .125 | 3/4″ , 1″ , 1 1/4″ , 1 1/2″ , 2″ , 3″ , 3 1/4″ |
| .134 | 1″ |
| .250 | 3″ |
| .375 | 3 1/2″ |
Duplex Steel Pipes are widely utilized in oil & gas pipelines, offshore drilling platforms, chemical processing facilities, and marine settings, all thanks to their remarkable strength and resistance to corrosion. They are perfect for desalination plants, heat exchangers, pressure vessels, and piping in the pulp & paper industry. Their ability to withstand chloride stress corrosion and their robust mechanical performance make them a great fit for power generation plants and firefighting systems. Plus, they offer a cost-effective solution for various applications.
©2024 Ojas Pipes and Tubes . All Rights Reserved.
