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- Muscat, OMAN
Home > Super Duplex Steel > Super Duplex Steel Boiler Tubing
Laila Pipes and Tubes, located in Muscat, Oman, stands out as a top manufacturer and supplier of premium Super Duplex Steel Boiler Tubing. Renowned for its precision engineering and commitment to international standards, the company provides tubing that boasts remarkable strength, corrosion resistance, and reliability, even in high-temperature and high-pressure situations. Designed to endure tough industrial environments, Super Duplex Steel Boiler Tubing ensures long-lasting performance and safety. Laila Pipes and Tubes caters to various industries throughout Oman and the Gulf region, offering robust solutions for essential boiler and heat transfer applications.
Super duplex steel boiler tubes are generally produced from grades such as UNS S32750 and S32760, with a two-phase microstructure balance of austenite and ferrite. The alloy has high chromium (24–26%), molybdenum (3–5%), and nickel (6–8%) content, which gives it outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking. Mechanically, it has very high tensile and yield strength, excellent fatigue life, and good weldability. The tubing has structural integrity at high temperatures and pressures and is well suited for harsh boiler applications where regular stainless steels will corrode or fail under thermal stress.
| 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.
This Super Duplex Steel Boiler Tubing is crafted from high-alloy duplex steel grades, which typically contain around 25% chromium, 6–7% nickel, 3–4% molybdenum, and nitrogen. This well-balanced austenitic-ferritic microstructure delivers impressive mechanical properties, such as high tensile and yield strength, excellent toughness, and outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking. The tubing maintains its dimensional accuracy and structural integrity, even when faced with extreme thermal and pressure conditions.
Laila Pipes and Tubes, one of the largest suppliers of Super Duplex Steel Boiler Tubing in the Muscats, OMAN. 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.
Super Duplex Steel Boiler Tubing finds extensive use in industries that demand high-performance boiler and heat exchanger systems. Common applications include power generation plants, petrochemical and chemical processing facilities, offshore and marine boilers, and industrial heating systems. Its ability to withstand high temperatures, corrosive environments, and mechanical stress makes Super Duplex Steel Boiler Tubing the perfect choice for critical high-pressure and high-temperature industrial applications.
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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