- sales@ojaspipesandtubes.co.in
- Kolkata, Kolkata
Home > Duplex Steel > Duplex Steel Pipe
Ojas Pipes and Tubes, located in Kolkata, India, stands out as a leading manufacturer and supplier of Super Duplex Steel Welded Pipes, providing cutting-edge piping solutions for tough industrial settings that face high levels of corrosion. These pipes are crafted to meet international standards like ASTM A790 and UNS S32750/S32760, blending impressive mechanical strength with remarkable resistance to pitting, crevice corrosion, and stress corrosion cracking. Ojas is committed to precision in fabrication, ensuring excellent weld integrity and consistent quality in every pipe they produce. Commonly found in offshore, petrochemical, and desalination projects, Ojas’s Super Duplex welded pipes deliver long-lasting performance and cost efficiency, even in the most challenging conditions.
Super Duplex Steel Welded Pipes from Ojas Pipes and Tubes generally consist of 24–26% chromium, 6–8% nickel, 3–5% molybdenum, and nitrogen, all of which enhance their strength and resistance to corrosion. These pipes boast impressive tensile strength (750–900 MPa) and high yield strength (≥550 MPa), nearly twice that of austenitic stainless steels. Their balanced duplex microstructure offers exceptional resistance to chloride-induced corrosion and high mechanical toughness. With outstanding weldability and precise dimensions, these pipes are perfect for high-pressure applications and environments that demand superior durability and corrosion resistance.
Pipe Range : 1 / 2″ NB – 8″ NB
Outer Diameter : 6.0-630mm
Wall Thickness : 0.3mm – 50 mm
Schedules : SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Length : Single Random, Double Random & Required Length
Specifications : ASTM A789 / ASME SA789
Types : Welded / ERW / Fabricated
| Duplex | Welded |
|---|---|
| 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 Welded 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 Welded 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 Welded 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.
Ojas Pipes and Tubes’ Super Duplex Steel Welded Pipes find extensive use in offshore oil and gas platforms, subsea pipelines, chemical processing facilities, desalination plants, and marine settings. Their remarkable resistance to harsh chemicals and chloride-rich environments makes them perfect for heat exchangers, pressure vessels, and structural applications in tough conditions. These pipes are also utilized in the pulp and paper, mining, and power generation industries, where exceptional strength and corrosion resistance are essential.
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