Duplex Steel Pipes and Tubes Supplier in the UAE
Duplex stainless steel pipes and tubes combine an austenitic-ferritic microstructure that delivers nearly double the strength of standard austenitic stainless steels like SS316, along with superior resistance to chloride stress corrosion cracking and pitting. This makes Duplex the preferred choice for UAE industries dealing with seawater, high chloride content, and aggressive process environments, conditions where SS316 pipes often fail prematurely.
As a trusted duplex steel pipes supplier in the UAE, Riyaarth Overseas manufactures, stocks, and exports high-quality piping solutions for procurement teams, EPC contractors, and importers across Abu Dhabi, Dubai, Sharjah, and the broader GCC region. We supply Duplex 2205 (UNS S31803/S32205) pipes and tubes in both seamless and welded construction, manufactured in accordance with ASTM A790 pipe and ASTM A789 tube specifications, along with Super Duplex 2507 (UNS S32750/S32760) for higher chloride and high-pressure applications.
Our product range includes:
- Seamless Duplex Steel Pipes as per ASTM A790, for high-pressure oil and gas, offshore, and process piping
- Welded Duplex Steel Pipes as per ASTM A790/A928, for larger diameters and structural piping
- Duplex Steel Tubes as per ASTM A789, for heat exchangers, instrumentation, and boiler tubing
- Duplex Steel U-Bend Tubes for heat exchanger bundles.
Common applications include offshore platforms, desalination plants, marine equipment, petrochemical processing, and LNG facilities, sectors where UAE industries need materials that combine high mechanical strength with long-term corrosion resistance in harsh coastal and desert climates.
For the latest Duplex Steel Pipe price in the UAE based on size, grade, wall thickness, and order quantity, you can contact Riyaarth Overseas directly for a quotation tailored to your project.
Specifications of Duplex Steel Pipes and Tubes
| Parameter | Specification |
|---|---|
| Pipe Standard | ASTM A790 / ASME SA790 |
| Tube Standard | ASTM A789 / ASME SA789 |
| Welded Pipe Standard | ASTM A928 |
| Grades | Duplex 2205 (UNS S31803 / S32205), Super Duplex 2507 (UNS S32750 / S32760) |
| Type | Seamless, Welded (ERW/EFW), U-Bend |
| Outer Diameter | 6 mm to 914 mm (1/8" to 36") |
| Wall Thickness | Sch 5s to Sch XXS |
| Length | Single random, double random, or as per drawing |
| Form | Round pipes and tubes, custom fabricated fittings on request |
| End Finish | Plain end, bevelled end, threaded |
| Surface Finish | Pickled and annealed, polished on request |
Duplex Steel Pipe Schedule Chart
| NPS | OD (mm) | Sch 10S (mm) | Sch 40S (mm) | Sch 80S (mm) | Sch XS (mm) |
|---|---|---|---|---|---|
| 1/2" | 21.3 | 2.11 | 2.77 | 3.73 | 4.78 |
| 1" | 33.4 | 2.77 | 3.38 | 4.55 | 6.35 |
| 2" | 60.3 | 2.77 | 3.91 | 5.54 | 7.62 |
| 4" | 114.3 | 3.05 | 6.02 | 8.56 | 11.13 |
| 6" | 168.3 | 3.40 | 7.11 | 10.97 | 14.27 |
| 8" | 219.1 | 3.76 | 8.18 | 12.70 | 15.09 |
| 10" | 273.0 | 4.19 | 9.27 | 12.70 | 18.26 |
| 12" | 323.9 | 4.57 | 9.53 | 14.27 | 17.48 |
Mechanical Properties
| Grade | Tensile Strength (min) | Yield Strength 0.2% (min) | Elongation (min) | Hardness (max) |
|---|---|---|---|---|
| Duplex 2205 (S31803) | 620 MPa | 450 MPa | 25% | 293 HB |
| Duplex 2205 (S32205) | 655 MPa | 450 MPa | 25% | 293 HB |
| Super Duplex 2507 (S32750) | 795 MPa | 550 MPa | 15% | 310 HB |
| Super Duplex 2507 (S32760) | 750 MPa | 550 MPa | 25% | 270 HB |
Chemical Composition
| Element | UNS S31803 | UNS S32205 | UNS S32750 (2507) |
|---|---|---|---|
| Carbon (C) | 0.030 max | 0.030 max | 0.030 max |
| Chromium (Cr) | 21.0–23.0% | 22.0–23.0% | 24.0–26.0% |
| Nickel (Ni) | 4.5–6.5% | 4.5–6.5% | 6.0–8.0% |
| Molybdenum (Mo) | 2.5–3.5% | 3.0–3.5% | 3.0–5.0% |
| Nitrogen (N) | 0.08–0.20% | 0.14–0.20% | 0.24–0.32% |
| Manganese (Mn) | 2.0 max | 2.0 max | 1.2 max |
| Phosphorus (P) | 0.030 max | 0.030 max | 0.035 max |
| Sulphur (S) | 0.020 max | 0.020 max | 0.020 max |
| Silicon (Si) | 1.0 max | 1.0 max | 0.8 max |
Duplex Steel Grades We Supply to the UAE
- Duplex 2205 (UNS S31803 / S32205)
Most widely used Duplex grade in the UAE for oil & gas, marine, and desalination piping. Offers a strong balance of mechanical strength and chloride resistance for coastal and offshore conditions.
- Super Duplex 2507 (UNS S32750 / S32760)
Higher chromium, molybdenum, and nitrogen content for greater pitting and crevice corrosion resistance. Preferred for offshore platforms and high-pressure seawater systems in the UAE.
- Duplex 2304 (UNS S32304)
A lean Duplex grade with lower nickel and molybdenum, suited for structural and moderate corrosion applications. Used where high strength is needed without the cost of higher-alloy Duplex grades.
- Zeron 100 (UNS S32760)
A proprietary Super Duplex grade with excellent resistance to seawater and sour service. Commonly specified for critical offshore and subsea piping systems in the UAE.
Applications of Duplex Steel Pipes in the UAE
UAE’s industrial landscape, spanning offshore oil fields, coastal desalination plants, and petrochemical complexes, demands materials engineered for chloride-heavy environments. Duplex steel pipes and tubes are widely specified across:
- Oil & Gas: Wellhead piping, gathering lines, process piping in onshore and offshore fields
- Offshore Platforms: Structural piping, firewater systems, and process lines exposed to seawater spray
- Marine Engineering: Shipbuilding piping systems, seawater cooling lines, and ballast systems
- Desalination Plants: RO and MSF plant piping, brine handling systems, and seawater intake lines
- Petrochemical & Chemical Processing: Reactor piping, heat exchangers, and acid handling systems
- LNG Facilities: Cryogenic-adjacent piping and process lines requiring high strength and corrosion resistance
- Power Plants: Cooling water systems and flue gas desulfurization piping
- Water Treatment: Municipal and industrial water treatment piping exposed to saline or brackish water
- Industrial Fabrication: Custom fittings, skids, and structural piping assemblies for EPC projects
Given the UAE’s coastal environment and reliance on seawater for cooling and desalination, Duplex 2205 offers a practical balance of strength and corrosion resistance that keeps long-term maintenance costs lower than standard austenitic grades.
Quality Assurance
Every batch of Duplex steel pipes and tubes supplied by Riyaarth Overseas is checked against dimensional, mechanical, and chemical requirements before dispatch. Our quality process includes:
- Raw material traceability and mill test certificates as per EN 10204 3.1
- Dimensional inspection covering OD, wall thickness, and length
- Mechanical testing including tensile, hardness, and impact where specified
- Positive Material Identification (PMI) testing on request
- Hydrostatic and non-destructive testing (UT, RT, PT) as per project specification
- Intergranular corrosion testing where required for chloride service
FAQs
Products
Industry We Serve
- Oil & Gas industries
- Chemical process industries
- Pump and valve in high pressure component
- Food industries
- Pulp and paper industry
- Aerospace industry
- Power plant
- Mechanical component
- Sugar industry
- Cement industry