Nguyen Fittings and Plates is a trusted manufacturer and supplier located in Da Nang, Vietnam, specializing in high-quality Duplex Steel Forged Fittings. These fittings are designed for industries that require exceptional strength, corrosion resistance, and durability in critical piping systems. The company is recognized for its precision manufacturing, commitment to international standards, and a customer-centric approach. They deliver robust, leak-proof, and long-lasting forged fittings tailored for the oil and gas, petrochemical, chemical processing, marine, and power generation sectors. With state-of-the-art forging facilities, rigorous quality control, and thorough testing, Nguyen Fittings and Plates guarantees safe, efficient, and cost-effective piping solutions for demanding industrial environments around the globe.
| Standards | ASTM A182 / ASME SA182 |
| Specifications | ASME B16.11, MSS SP-79, 83, 95, 97, BS 3799 |
| Size Range | NPS 1/8″- 4″ (DN 6~100) |
| Rating Pressure | Threaded End – 2000/3000/6000 LBS. Socket weld End – 3000/6000/9000 LBS. |
| Type | Socket Weld, Screwed, BSP Threaded & NPT Threaded |
Duplex Steel Forged Fittings are made from a combination of austenitic and ferritic stainless steels, typically containing 22-25% chromium, 4.5-6.5% nickel, 3-5% molybdenum, along with small amounts of nitrogen, manganese, and silicon. This unique composition provides superior corrosion resistance, particularly in chloride-rich environments, and enhances strength. Mechanically, these fittings offer a tensile strength of 620-750 MPa, yield strength of 450 MPa, and approximately 25% elongation. They also exhibit excellent fatigue resistance and high toughness, making them ideal for high-pressure and corrosive applications in various industries.
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Fe |
| S31803 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 22.0 – 23.0 | 3.0 – 3.5 | 4.50 – 6.50 | 0.14 – 0.20 | 63.72 min |
| S32205 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 21.0 – 23.0 | 2.50 – 3.50 | 4.50 – 6.50 | 0.8 – 0.20 | 63.54 min |
| Grades | Density (g/cm 3) | Density (lb/in 3) | Melting Point (°C) | Melting Point (°F) |
| S31803 / S32205 | 7.805 | 0.285 | 1420 – 1465 | 2588 – 2669 |
Duplex Steel Forged Fittings are crafted from a balanced microstructure of austenite and ferrite, which provides remarkable tensile and yield strength, improved toughness, and exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking. These fittings boast good weldability, structural integrity, and dependable performance across a wide range of temperatures and pressures, making them perfect for high-stress and corrosive service applications where both strength and corrosion protection are vital.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Choose Duplex Steel Forged Fittings from Teerasil Fittings for superior quality, exceptional corrosion resistance, and reliable performance in extreme conditions. We offer customized solutions backed by expert support and industry experience.
Duplex Steel Forged Fittings offer several advantages, including exceptional corrosion resistance, particularly in chloride environments, making them ideal for industries like oil and gas, marine, and chemical processing. Their unique composition of austenitic and ferritic steels provides high strength, excellent resistance to stress corrosion cracking, and superior fatigue resistance. These fittings also offer excellent weldability and formability, allowing easy installation. With impressive toughness, even at low temperatures, Duplex Steel Forged Fittings are durable, reliable, and capable of withstanding high-pressure and high-temperature conditions, ensuring long-lasting performance and minimal maintenance.
Yes, custom sizes for Duplex Steel Forged Fittings are available at Teerasil Fittings. We offer tailored solutions to meet your specific requirements, ensuring optimal performance for your projects. For more information, please contact us at sales@teerasilfittings.com.
| STANDARD | UNS | |
| Duplex Steel Forged Fittings | S31803 / S32205 |
| DN-NPT | MAJOR DIAMETER MM | TAPPING /DRILL SIZE MM | TPI | PITCH MM |
|---|---|---|---|---|
| 1/16″ | 7.895 | 6.00 | 27 | 0.941 |
| 1/8″ | 10.242 | 8.25 | 27 | 0.941 |
| 1/4″ | 13.616 | 10.70 | 18 | 1.411 |
| 3/8″ | 17.055 | 14.10 | 18 | 1.411 |
| 1/2″ | 21.223 | 17.40 | 14 | 1.814 |
| 3/4″ | 26.568 | 22.60 | 14 | 1.814 |
| 1″ | 33.228 | 28.50 | 11.5 | 2.209 |
| 1¼” | 41.985 | 37.00 | 11.5 | 2.209 |
| 1½” | 48.054 | 43.50 | 11.5 | 2.209 |
| 2″ | 60.092 | 55.00 | 11.5 | 2.209 |
| 2½” | 72.699 | 65.50 | 8 | 3.175 |
| 3″ | 88.608 | 81.50 | 8 | 3.175 |
| 3½” | 101.316 | 94.30 | 8 | 3.175 |
| 4″ | 113.973 | 107.00 | 8 | 3.175 |
| 5″ | 141.300 | 134.384 | 8 | 3.175 |
| 6″ | 168.275 | 161.191 | 8 | 3.175 |
| 8″ | 219.075 | 211.673 | 8 | 3.175 |
| 10″ | 273.050 | 265.311 | 8 | 3.175 |
| 12″ | 323.850 | 315.793 | 8 | 3.175 |
| Description | Class Designation | ||
|---|---|---|---|
| 3000 | 6000 | 9000 | |
| Elbows 45 and 90 degrees, Tees, Crosses, Couplings, Half-Couplings, End or Pipe Caps | 1/2 – 4 | 1/2 – 2 | 1/2 – 2 |
| 1/2 – 4 | 1/2 – 2 | 1/2 – 2 | |
| 1/2 – 4 | 1/2 – 2 | 1/2 – 2 | |
| Pipe Size by Wall Thickness | SCH 80 / XS | SCH 160 | XXS |
You’ll find Duplex Steel Forged Fittings in various applications, including offshore platforms, desalination plants, chemical processing units, heat exchangers, and marine engineering systems. They’re also utilized in pulp and paper mills, wastewater treatment plants, and power generation facilities, where resistance to harsh chemicals and seawater environments is essential. Their unique blend of mechanical strength, corrosion resistance, and operational longevity ensures safe, continuous, and efficient performance in some of the toughest industrial service conditions around the world.
Get in touch with one of our Technical Sales Representatives to request a quote or get answers to any questions you may have.
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