- sales@blundellpipes.co.nz
- Hamilton, New Zealand
Home > Super Duplex Steel > Super Duplex Steel Boiler Tubing
Blundell Pipes and Tubes, a reputable manufacturer and supplier based in Hamilton, New Zealand, proudly presents its top-notch Super Duplex Steel Boiler Tubing. This tubing is crafted to offer outstanding resistance to corrosion, stability under high pressure, and remarkable mechanical strength, even in the most demanding environments. With a focus on precision and rigorous quality control, this product ensures exceptional performance in boilers, heat transfer systems, and high-temperature applications. Its sturdy design, extended service life, and capability to handle aggressive media make it a dependable choice for industries that prioritize durability, efficiency, and safety.
Constructed from a high-alloy super duplex stainless steel, this tubing features a balanced mix of chromium, nickel, molybdenum, and nitrogen. This unique composition grants it impressive resistance to pitting, crevice corrosion, and stress corrosion cracking, particularly in environments rich in chlorides and high temperatures. On the mechanical side, it boasts very high tensile and yield strength, excellent fatigue resistance, and robust thermal stability. The duplex structure of the alloy enhances its toughness and ensures it maintains its shape under varying pressure and heat conditions.
| 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 Blundell 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.
Blundell Pipes and Tubes, one of the largest suppliers of Super Duplex Steel Boiler Tubing in the Hamiltons, New Zealand. 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 Blundell 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@blundellpipes.co.nz.
Super duplex steel boiler tubes find extensive application in high-temperature and high-pressure applications where corrosion resistance and high strength are a must. In power generation plants, it finds application in boilers, superheaters, and heat recovery steam generators that operate in hostile feedwater and exhaust gases. In petrochemical and offshore sectors, it is used in heat exchangers and pressure vessels that work under extreme chemical and marine conditions. It is also applied in waste-to-energy plants, desalination, and industrial steam systems. The long service life of the material, low maintenance requirements, and superior mechanical properties render it suitable for critical boiler and thermal transfer applications.
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