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Home > Super Duplex Steel > Super Duplex Steel Boiler Tubing
High-grade Super Duplex Steel Boiler Tubing made for harsh service conditions is available from Vipul Pipes and Tubes, a top manufacturer and supplier in Chennai, India. These tubes are perfect for high-pressure, high-temperature boiler systems because of their strength, resistance to corrosion, and thermal stability. Power plants, petrochemical facilities, and the marine industry all rely on Vipul’s boiler tubing because it is made in accordance with international standards like ASTM A789 and A790. Vipul Pipes and Tubes guarantees dependable and effective tubing solutions for crucial boiler applications throughout India and beyond with its sophisticated production capabilities, stringent quality controls, and prompt delivery.
Grades such as UNS S32750 or S32760, which contain roughly 25% chromium, 7% nickel, 3.5% molybdenum, and nitrogen, are typically used to make super duplex steel boiler tubing. Its dual-phase austenitic-ferritic structure provides exceptional resistance to oxidation, pitting, stress corrosion, and cracking. Even at high temperatures, these tubes exhibit outstanding impact resistance, a yield strength of about 550 MPa, and a tensile strength of 800–1000 MPa. In demanding boiler environments, the tubing’s mechanical integrity is guaranteed by its strong fatigue resistance and weldability. Long-term performance in harsh heat, pressure, and corrosive environments is made possible by this combination of qualities.
| Specifications | ASTM A789 ASME SA789 |
| Dimensions | ASTM, ASME and API |
| Tube Size | 1/2″NB TO 12 “NB IN |
| Specialized in | Large Diameter Size |
| Schedule | SCH20, SCH30, SCH40, STD, SCH80 |
| Type | Fire Boiler Tubing/ Hot Rolled Boiler Tube/ Heat Expansion Boiler Tube/ IBR Seamless Boiler Tubes |
| Material | Super Duplex Steel |
|---|---|
| Carbon (C) Max. | 0.030 |
| Manganese (Mn) Max. | 1.20 |
| Phosphorous (P) Max. | 0.035 |
| Sulphur (S) Max. | 0.020 |
| Silicon (Si) Max. | 0.80 |
| Chromium (Cr) | 24.0–26.0 |
| Nickel (Ni) | 6.0–8.0 |
| Molybdenum (Mo) | 3.0–5.0 |
| Nitrogen (N) | 0.24–0.32 |
| Iron (Fe) | Bal. |
| Copper (Cu) | 0.50 |
| Other Elements | — |
| Tensile Strength | Yield Strength | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Alloy | UNS Designation | Spec. | psi | MPa | ksi | psi | MPa | ksi | Elongation in 2 in. (min.) % | Grain Size Req. | Max. Hardness | Modulus of Elasticity (x106psi) | Mean Coefficient of Thermal Expansion (IN./IN./°F x 10-6) | Thermal Conductivity (BTU-in/ ft2-h-°F) |
| Super Duplex | – | A789, A790 | 100,000 | 690 | 100 | 70,000 | 485 | 70 | 20 | — | 30.5 Rc | — | — | — |
| Super Duplex | – | A789, A790 | 116,000 | 800 | 116 | 80,000 | 550 | 80 | 15 | — | 32 Rc | 27.5 | 7.2 | |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Choosing Super Duplex Steel Boiler Tubing from Vipul 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.
Vipul Pipes and Tubes, one of the largest suppliers of Super Duplex Steel Boiler Tubing in the Chennais, India. 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 Super Duplex steel products in the region, delivering reliable solutions to meet diverse project requirements.
Yes, we provide custom sizes for Super Duplex Steel Boiler Tubing to meet your specific requirements. At Vipul 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@vipulpipesandtubes.co.in.
Super Duplex Steel Boiler Tubing is widely used in petrochemical refineries, thermal and nuclear power plants, and marine boiler systems where high temperatures and high pressures are common. It is perfect for heat recovery steam generators (HRSGs), reheaters, economisers, and superheaters. It is appropriate for use with aggressive media, such as high-chloride and acidic gases, due to its remarkable resistance to corrosion and oxidation. In industries where long-term durability and low maintenance are crucial, such as chemical processing, offshore platforms, and waste-to-energy plants, the tubing is also used. Its reliable operation improves safety and operational efficiency in vital steam generation and heat exchange systems.
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